Extract some modules
This commit is contained in:
Ingvar Stepanyan
435
ui.js
435
ui.js
@@ -1,435 +0,0 @@
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import { h, render, Component, createRef, Fragment } from 'preact';
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import initModule from './libapi.mjs';
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/** @typedef {InstanceType<import('./libapi.mjs').Module['Context']>} Context */
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/** @typedef {import('./libapi.mjs').Config} Config */
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let isDebug = new URLSearchParams(location.search).has('debug');
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if (isDebug) {
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// @ts-ignore
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await import('preact/debug');
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}
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/** This function should be called once user has selected the camera and other operations can begin. */
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let start;
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let started = new Promise(resolve => {
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start = resolve;
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});
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/** Schedules an exclusive async operation on the global context. */
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const scheduleOp = (() => {
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let queue = (async () => {
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let { Context } = await initModule();
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await started;
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let ctx = await new Context();
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addEventListener('beforeunload', e => {
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ctx.delete();
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});
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return ctx;
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})();
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/**
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* @template T
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* @param {(ctx: Context) => Promise<T>} op
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* @returns {Promise<T>}
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*/
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return function scheduleOp(op) {
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let caughtRes = queue.then(async ctx => {
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let resultPromise = op(ctx);
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try {
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await resultPromise;
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} catch {}
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return {
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ctx,
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resultPromise
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};
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});
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// Queue should ignore result values as well as errors from singular ops.
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queue = caughtRes.then(res => res.ctx);
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// Result should contain the unwrapped value or error.
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return caughtRes.then(res => res.resultPromise);
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};
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})();
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/**
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*
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* @extends Component<{ config: Config }>
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*/
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class Widget extends Component {
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state = { inProgress: false };
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shouldComponentUpdate(
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/** @type {Widget['props']} */ nextProps,
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/** @type {Widget['state']} */ nextState
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) {
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return !(this.state.inProgress && nextState.inProgress);
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}
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getValueProp(out = false) {
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switch (this.props.config.type) {
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case 'toggle':
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return 'checked';
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case 'datetime':
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return 'valueAsNumber';
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case 'range':
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// Apparently can't render with `valueAsNumber` as preact property,
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// but can retrieve it back.
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return out ? 'valueAsNumber' : 'value';
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default:
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return 'value';
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}
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}
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handleChange = async e => {
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this.setState({ inProgress: true });
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let value = e.target[this.getValueProp(true)];
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try {
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/** @type {Promise<void>} */
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let uiTimeout;
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await scheduleOp(context => {
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// This is terrible, yes... but some configs return too quickly before they're actually updated.
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// We want to wait some time before updating the UI in that case, but not block subsequent ops.
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uiTimeout = new Promise(resolve => setTimeout(resolve, 800));
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return context.setConfigValue(this.props.config.name, value);
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});
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await uiTimeout;
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} catch (e) {
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console.error(e);
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}
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this.setState({ inProgress: false });
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};
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render(
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/** @type {Widget['props']} */ { config },
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/** @type {Widget['state']} */ { inProgress }
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) {
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let { label, name } = config;
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let id = `config-${name}`;
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if (config.type === 'window' || config.type === 'section') {
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return h(
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'fieldset',
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{ id },
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h('legend', {}, label),
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Object.values(config.children).map(config =>
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h(Widget, { key: config.name, config })
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)
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);
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}
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let { value, readonly } = config;
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let valueProp = this.getValueProp();
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let attrs = {
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id,
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[valueProp]: value,
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readonly: readonly || inProgress,
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onChange: this.handleChange
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};
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let inputElem;
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switch (config.type) {
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case 'range': {
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let { min, max, step } = config;
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inputElem = h(EditableInput, {
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type: 'number',
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min,
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max,
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step,
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...attrs
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});
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break;
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}
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case 'text':
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inputElem = readonly ? value : h(EditableInput, attrs);
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break;
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case 'toggle': {
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inputElem = h('input', {
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type: 'checkbox',
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...attrs
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});
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break;
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}
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case 'menu':
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case 'radio': {
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let { choices } = config;
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inputElem = h(
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'select',
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attrs,
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choices.map(choice =>
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h(Option, {
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key: choice,
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value: choice,
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disabled: attrs.readonly && value !== choice
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})
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)
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);
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break;
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}
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case 'datetime': {
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inputElem = h(EditableInput, {
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type: 'datetime-local',
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...attrs
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});
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break;
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}
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default: {
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inputElem = '(unimplemented)';
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break;
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}
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}
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return h(
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'div',
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{ class: 'pure-control-group' },
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h('label', { for: id }, (inProgress ? '⌛ ' : '') + label),
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inputElem
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);
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}
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}
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/**
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* Special memoized option to work around https://github.com/preactjs/preact/issues/3171.
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* @extends Component<{ value: string, disabled?: boolean }>
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*/
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class Option extends Component {
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shouldComponentUpdate(/** @type {Option['props']} */ nextProps) {
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return nextProps.value !== this.props.value;
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}
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render() {
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return h('option', this.props, this.props.value);
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}
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}
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/**
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* Wrapper around <input /> that doesn't update it while it's in focus to allow editing.
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*/
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class EditableInput extends Component {
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ref = createRef();
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shouldComponentUpdate() {
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return document.activeElement !== this.ref.current;
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}
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render(props) {
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return h('input', Object.assign(props, { ref: this.ref }));
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}
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}
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/** @extends Component<null, { inProgress: boolean }> */
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class CaptureButton extends Component {
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state = { inProgress: false };
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handleCapture = async () => {
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this.setState({ inProgress: true });
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let file = await scheduleOp(context => context.captureImageAsFile());
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let url = URL.createObjectURL(file);
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Object.assign(document.createElement('a'), {
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download: file.name,
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href: url
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}).click();
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URL.revokeObjectURL(url);
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this.setState({ inProgress: false });
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};
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render() {
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return h(
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Fragment,
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null,
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h('input', {
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type: 'button',
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id: 'capture',
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class:
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'pure-button' + (this.state.inProgress ? ' pure-button-active' : ''),
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onclick: this.handleCapture,
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value: `${this.state.inProgress ? '⌛' : '📷'} Capture image`
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})
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);
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}
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}
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/** @typedef {{ type: 'CameraPicker' } | { type: 'Status', message: string } | { type: 'Config', config: Config }} AppState */
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const INTERFACE_CLASS = 6; // PTP
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const INTERFACE_SUBCLASS = 1; // MTP
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/** @extends Component<null, AppState> */
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class App extends Component {
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state = /** @type {AppState} */ ({
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type: 'Status',
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message: 'Looking for cameras...'
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});
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constructor(...args) {
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super(...args);
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// @ts-ignore
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navigator.usb.getDevices().then(devices => {
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for (let dev of devices) {
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for (let conf of dev.configurations) {
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for (let intf of conf.interfaces) {
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for (let alt of intf.alternates) {
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if (
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alt.interfaceClass === INTERFACE_CLASS &&
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alt.interfaceSubclass === INTERFACE_SUBCLASS
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) {
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return this.connectToCamera();
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}
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}
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}
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}
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}
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this.setState({ type: 'CameraPicker' });
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});
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addEventListener('error', ({ message }) => {
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this.setState({
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type: 'Status',
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message: `⚠ ${message}`
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});
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});
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}
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selectDevice = async () => {
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// @ts-ignore
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await navigator.usb.requestDevice({
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filters: [
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{
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classCode: INTERFACE_CLASS,
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subclassCode: INTERFACE_SUBCLASS
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}
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]
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});
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this.connectToCamera();
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};
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connectToCamera() {
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start();
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this.setState({ type: 'Status', message: 'Connecting...' });
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(async () => {
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while (true) {
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await this.refreshConfig();
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await new Promise(resolve => setTimeout(resolve, 100));
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}
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})();
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}
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async refreshConfig() {
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let config = await scheduleOp(context => context.configToJS());
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if (!isDebug) {
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delete config.children.other;
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}
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this.setState({
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type: 'Config',
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config
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});
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}
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render(/** @type {App['props']} */ props, /** @type {App['state']} */ state) {
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switch (state.type) {
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case 'CameraPicker':
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return h(
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'div',
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{ class: 'center-parent' },
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h('input', {
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class: 'center',
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type: 'button',
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onclick: this.selectDevice,
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value: '🔍 Select camera'
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})
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);
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case 'Status':
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return h(
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'div',
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{ class: 'center-parent' },
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h('div', { class: 'center' }, state.message)
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);
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case 'Config':
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return h(
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'div',
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{ class: 'pure-g' },
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h(
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'div',
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{ class: 'pure-u-2-3 center-parent', id: 'canvas-holder' },
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h(PreviewCanvas, {
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id: 'preview-canvas',
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class: 'center'
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})
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),
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h(
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'div',
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{ id: 'config', class: 'pure-u-1-3' },
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h(
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'form',
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{ class: 'pure-form pure-form-aligned' },
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h(CaptureButton, null),
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h(Widget, { config: state.config })
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)
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)
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);
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}
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}
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}
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render(h(App, null), document.body);
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class PreviewCanvas extends Component {
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ref = createRef();
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render(props) {
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return h('canvas', { ...props, ref: this.ref });
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}
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async componentDidMount() {
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let canvas = /** @type {HTMLCanvasElement} */ (this.ref.current);
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let canvasHolder = canvas.parentElement;
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let canvasCtx = canvas.getContext('bitmaprenderer');
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let ratio = 0;
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function updateCanvasSize() {
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let width = canvasHolder.offsetWidth - 10;
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let height = canvasHolder.offsetHeight;
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if (height * ratio > width) {
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height = width / ratio;
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} else {
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width = height * ratio;
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}
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Object.assign(canvas, { width, height });
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}
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new ResizeObserver(updateCanvasSize).observe(canvasHolder);
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// I have no idea why, but if we connect too soon, it just hangs...
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await new Promise(resolve => setTimeout(resolve, 1000));
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while (true) {
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try {
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let blob = await scheduleOp(context => context.capturePreviewAsBlob());
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// If ratio is known; decode resized image right away - it's a bit faster.
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// If it isn't known, retrieve entire image to calculate ratio from its dimensions.
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let img = await createImageBitmap(
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blob,
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ratio
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? {
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resizeWidth: canvas.width,
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resizeHeight: canvas.height
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}
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: {}
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);
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if (!ratio) {
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ratio = img.width / img.height;
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updateCanvasSize();
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}
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canvasCtx.transferFromImageBitmap(img);
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} catch (e) {
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console.warn(e);
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}
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await new Promise(resolve => requestAnimationFrame(resolve));
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}
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}
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}
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@@ -42,6 +42,6 @@
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}
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}
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</script>
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<script type="module" src="ui.js"></script>
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<script type="module" src="index.js"></script>
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</head>
|
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</html>
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234
ui/index.js
Normal file
234
ui/index.js
Normal file
@@ -0,0 +1,234 @@
|
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import { h, render, Component, createRef, Fragment } from 'preact';
|
||||
import { scheduleOp, start } from './ops.js';
|
||||
import { Widget } from './widget.js';
|
||||
|
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/** @typedef {import('../libapi.mjs').Context} Context */
|
||||
/** @typedef {import('../libapi.mjs').Config} Config */
|
||||
|
||||
let isDebug = new URLSearchParams(location.search).has('debug');
|
||||
|
||||
if (isDebug) {
|
||||
// @ts-ignore
|
||||
await import('preact/debug');
|
||||
}
|
||||
|
||||
/** @extends Component<null, { inProgress: boolean }> */
|
||||
class CaptureButton extends Component {
|
||||
state = { inProgress: false };
|
||||
|
||||
handleCapture = async () => {
|
||||
this.setState({ inProgress: true });
|
||||
let file = await scheduleOp(context => context.captureImageAsFile());
|
||||
let url = URL.createObjectURL(file);
|
||||
Object.assign(document.createElement('a'), {
|
||||
download: file.name,
|
||||
href: url
|
||||
}).click();
|
||||
URL.revokeObjectURL(url);
|
||||
this.setState({ inProgress: false });
|
||||
};
|
||||
|
||||
render() {
|
||||
return h(
|
||||
Fragment,
|
||||
null,
|
||||
h('input', {
|
||||
type: 'button',
|
||||
id: 'capture',
|
||||
class:
|
||||
'pure-button' + (this.state.inProgress ? ' pure-button-active' : ''),
|
||||
onclick: this.handleCapture,
|
||||
value: `${this.state.inProgress ? '⌛' : '📷'} Capture image`
|
||||
})
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
/** @typedef {{ type: 'CameraPicker' } | { type: 'Status', message: string } | { type: 'Config', config: Config }} AppState */
|
||||
|
||||
const INTERFACE_CLASS = 6; // PTP
|
||||
const INTERFACE_SUBCLASS = 1; // MTP
|
||||
|
||||
/** @extends Component<null, AppState> */
|
||||
class App extends Component {
|
||||
state = /** @type {AppState} */ ({
|
||||
type: 'Status',
|
||||
message: 'Looking for cameras...'
|
||||
});
|
||||
|
||||
constructor(...args) {
|
||||
super(...args);
|
||||
// @ts-ignore
|
||||
navigator.usb.getDevices().then(devices => {
|
||||
for (let dev of devices) {
|
||||
for (let conf of dev.configurations) {
|
||||
for (let intf of conf.interfaces) {
|
||||
for (let alt of intf.alternates) {
|
||||
if (
|
||||
alt.interfaceClass === INTERFACE_CLASS &&
|
||||
alt.interfaceSubclass === INTERFACE_SUBCLASS
|
||||
) {
|
||||
return this.connectToCamera();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
this.setState({ type: 'CameraPicker' });
|
||||
});
|
||||
addEventListener('error', ({ message }) => {
|
||||
this.setState({
|
||||
type: 'Status',
|
||||
message: `⚠ ${message}`
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
selectDevice = async () => {
|
||||
// @ts-ignore
|
||||
await navigator.usb.requestDevice({
|
||||
filters: [
|
||||
{
|
||||
classCode: INTERFACE_CLASS,
|
||||
subclassCode: INTERFACE_SUBCLASS
|
||||
}
|
||||
]
|
||||
});
|
||||
this.connectToCamera();
|
||||
};
|
||||
|
||||
connectToCamera() {
|
||||
start();
|
||||
this.setState({ type: 'Status', message: 'Connecting...' });
|
||||
(async () => {
|
||||
while (true) {
|
||||
await this.refreshConfig();
|
||||
await new Promise(resolve => setTimeout(resolve, 100));
|
||||
}
|
||||
})();
|
||||
}
|
||||
|
||||
async refreshConfig() {
|
||||
let config = await scheduleOp(context => context.configToJS());
|
||||
if (!isDebug) {
|
||||
delete config.children.other;
|
||||
}
|
||||
this.setState({
|
||||
type: 'Config',
|
||||
config
|
||||
});
|
||||
}
|
||||
|
||||
render(/** @type {App['props']} */ props, /** @type {App['state']} */ state) {
|
||||
switch (state.type) {
|
||||
case 'CameraPicker':
|
||||
return h(
|
||||
'div',
|
||||
{ class: 'center-parent' },
|
||||
h('input', {
|
||||
class: 'center',
|
||||
type: 'button',
|
||||
onclick: this.selectDevice,
|
||||
value: '🔍 Select camera'
|
||||
})
|
||||
);
|
||||
case 'Status':
|
||||
return h(
|
||||
'div',
|
||||
{ class: 'center-parent' },
|
||||
h('div', { class: 'center' }, state.message)
|
||||
);
|
||||
case 'Config':
|
||||
return h(
|
||||
'div',
|
||||
{ class: 'pure-g' },
|
||||
h('div', { class: 'pure-u-2-3' }, h(PreviewCanvas, null)),
|
||||
h(
|
||||
'div',
|
||||
{ id: 'config', class: 'pure-u-1-3' },
|
||||
h(
|
||||
'form',
|
||||
{ class: 'pure-form pure-form-aligned' },
|
||||
h(CaptureButton, null),
|
||||
h(Widget, { config: state.config })
|
||||
)
|
||||
)
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
render(h(App, null), document.body);
|
||||
|
||||
class PreviewCanvas extends Component {
|
||||
canvasHolderRef = createRef();
|
||||
canvasRef = createRef();
|
||||
|
||||
render(props) {
|
||||
return h(
|
||||
'div',
|
||||
{ class: 'center-parent', ref: this.canvasHolderRef },
|
||||
h('canvas', { class: 'center', ref: this.canvasRef })
|
||||
);
|
||||
}
|
||||
|
||||
async componentDidMount() {
|
||||
let canvas = /** @type {HTMLCanvasElement} */ (this.canvasRef.current);
|
||||
let canvasHolder = this.canvasHolderRef.current;
|
||||
|
||||
let canvasCtx = canvas.getContext('bitmaprenderer');
|
||||
|
||||
let ratio = 0;
|
||||
|
||||
let throttled = 0;
|
||||
function updateCanvasSize() {
|
||||
if (throttled) {
|
||||
cancelAnimationFrame(throttled);
|
||||
}
|
||||
throttled = requestAnimationFrame(() => {
|
||||
throttled = 0;
|
||||
|
||||
let width = canvasHolder.offsetWidth - 10;
|
||||
let height = canvasHolder.offsetHeight;
|
||||
|
||||
if (height * ratio > width) {
|
||||
height = width / ratio;
|
||||
} else {
|
||||
width = height * ratio;
|
||||
}
|
||||
|
||||
Object.assign(canvas, { width, height });
|
||||
});
|
||||
}
|
||||
new ResizeObserver(updateCanvasSize).observe(canvasHolder);
|
||||
|
||||
// I have no idea why, but if we connect too soon, it just hangs...
|
||||
await new Promise(resolve => setTimeout(resolve, 1000));
|
||||
|
||||
while (true) {
|
||||
try {
|
||||
let blob = await scheduleOp(context => context.capturePreviewAsBlob());
|
||||
|
||||
// If ratio is known; decode resized image right away - it's a bit faster.
|
||||
// If it isn't known, retrieve entire image to calculate ratio from its dimensions.
|
||||
let img = await createImageBitmap(
|
||||
blob,
|
||||
ratio
|
||||
? {
|
||||
resizeWidth: canvas.width,
|
||||
resizeHeight: canvas.height
|
||||
}
|
||||
: {}
|
||||
);
|
||||
if (!ratio) {
|
||||
ratio = img.width / img.height;
|
||||
updateCanvasSize();
|
||||
}
|
||||
canvasCtx.transferFromImageBitmap(img);
|
||||
} catch (e) {
|
||||
console.warn(e);
|
||||
}
|
||||
await new Promise(resolve => requestAnimationFrame(resolve));
|
||||
}
|
||||
}
|
||||
}
|
||||
44
ui/ops.js
Normal file
44
ui/ops.js
Normal file
@@ -0,0 +1,44 @@
|
||||
import initModule from '../libapi.mjs';
|
||||
|
||||
/** @typedef {import('../libapi.mjs').Context} Context */
|
||||
|
||||
/** This function should be called once user has selected the camera and other operations can begin. */
|
||||
export let start;
|
||||
|
||||
let started = new Promise(resolve => {
|
||||
start = resolve;
|
||||
});
|
||||
|
||||
let queue = (async () => {
|
||||
let { Context } = await initModule();
|
||||
await started;
|
||||
let ctx = await new Context();
|
||||
addEventListener('beforeunload', e => {
|
||||
ctx.delete();
|
||||
});
|
||||
return ctx;
|
||||
})();
|
||||
|
||||
/** Schedules an exclusive async operation on the global context.
|
||||
* @template T
|
||||
* @param {(ctx: Context) => Promise<T>} op
|
||||
* @returns {Promise<T>}
|
||||
*/
|
||||
export function scheduleOp(op) {
|
||||
let caughtRes = queue.then(async ctx => {
|
||||
let resultPromise = op(ctx);
|
||||
try {
|
||||
await resultPromise;
|
||||
} catch {}
|
||||
return {
|
||||
ctx,
|
||||
resultPromise
|
||||
};
|
||||
});
|
||||
|
||||
// Queue should ignore result values as well as errors from singular ops.
|
||||
queue = caughtRes.then(res => res.ctx);
|
||||
|
||||
// Result should contain the unwrapped value or error.
|
||||
return caughtRes.then(res => res.resultPromise);
|
||||
}
|
||||
168
ui/widget.js
Normal file
168
ui/widget.js
Normal file
@@ -0,0 +1,168 @@
|
||||
import { h, Component, createRef } from 'preact';
|
||||
import { scheduleOp } from './ops.js';
|
||||
|
||||
/** @typedef {import('../libapi.mjs').Config} Config */
|
||||
|
||||
/**
|
||||
*
|
||||
* @extends Component<{ config: Config }>
|
||||
*/
|
||||
export class Widget extends Component {
|
||||
state = { inProgress: false };
|
||||
|
||||
shouldComponentUpdate(
|
||||
/** @type {Widget['props']} */ nextProps,
|
||||
/** @type {Widget['state']} */ nextState
|
||||
) {
|
||||
return !(this.state.inProgress && nextState.inProgress);
|
||||
}
|
||||
|
||||
getValueProp(out = false) {
|
||||
switch (this.props.config.type) {
|
||||
case 'toggle':
|
||||
return 'checked';
|
||||
case 'datetime':
|
||||
return 'valueAsNumber';
|
||||
case 'range':
|
||||
// Apparently can't render with `valueAsNumber` as preact property,
|
||||
// but can retrieve it back.
|
||||
return out ? 'valueAsNumber' : 'value';
|
||||
default:
|
||||
return 'value';
|
||||
}
|
||||
}
|
||||
|
||||
handleChange = async e => {
|
||||
this.setState({ inProgress: true });
|
||||
|
||||
let value = e.target[this.getValueProp(true)];
|
||||
|
||||
try {
|
||||
/** @type {Promise<void>} */
|
||||
let uiTimeout;
|
||||
await scheduleOp(context => {
|
||||
// This is terrible, yes... but some configs return too quickly before they're actually updated.
|
||||
// We want to wait some time before updating the UI in that case, but not block subsequent ops.
|
||||
uiTimeout = new Promise(resolve => setTimeout(resolve, 800));
|
||||
return context.setConfigValue(this.props.config.name, value);
|
||||
});
|
||||
await uiTimeout;
|
||||
} catch (e) {
|
||||
console.error(e);
|
||||
}
|
||||
|
||||
this.setState({ inProgress: false });
|
||||
};
|
||||
|
||||
render(
|
||||
/** @type {Widget['props']} */ { config },
|
||||
/** @type {Widget['state']} */ { inProgress }
|
||||
) {
|
||||
let { label, name } = config;
|
||||
let id = `config-${name}`;
|
||||
if (config.type === 'window' || config.type === 'section') {
|
||||
return h(
|
||||
'fieldset',
|
||||
{ id },
|
||||
h('legend', {}, label),
|
||||
Object.values(config.children).map(config =>
|
||||
h(Widget, { key: config.name, config })
|
||||
)
|
||||
);
|
||||
}
|
||||
let { value, readonly } = config;
|
||||
let valueProp = this.getValueProp();
|
||||
let attrs = {
|
||||
id,
|
||||
[valueProp]: value,
|
||||
readonly: readonly || inProgress,
|
||||
onChange: this.handleChange
|
||||
};
|
||||
let inputElem;
|
||||
switch (config.type) {
|
||||
case 'range': {
|
||||
let { min, max, step } = config;
|
||||
inputElem = h(EditableInput, {
|
||||
type: 'number',
|
||||
min,
|
||||
max,
|
||||
step,
|
||||
...attrs
|
||||
});
|
||||
break;
|
||||
}
|
||||
case 'text':
|
||||
inputElem = readonly ? value : h(EditableInput, attrs);
|
||||
break;
|
||||
case 'toggle': {
|
||||
inputElem = h('input', {
|
||||
type: 'checkbox',
|
||||
...attrs
|
||||
});
|
||||
break;
|
||||
}
|
||||
case 'menu':
|
||||
case 'radio': {
|
||||
let { choices } = config;
|
||||
inputElem = h(
|
||||
'select',
|
||||
attrs,
|
||||
choices.map(choice =>
|
||||
h(Option, {
|
||||
key: choice,
|
||||
value: choice,
|
||||
disabled: attrs.readonly && value !== choice
|
||||
})
|
||||
)
|
||||
);
|
||||
break;
|
||||
}
|
||||
case 'datetime': {
|
||||
inputElem = h(EditableInput, {
|
||||
type: 'datetime-local',
|
||||
...attrs
|
||||
});
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
inputElem = '(unimplemented)';
|
||||
break;
|
||||
}
|
||||
}
|
||||
return h(
|
||||
'div',
|
||||
{ class: 'pure-control-group' },
|
||||
h('label', { for: id }, (inProgress ? '⌛ ' : '') + label),
|
||||
inputElem
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Special memoized option to work around https://github.com/preactjs/preact/issues/3171.
|
||||
* @extends Component<{ value: string, disabled?: boolean }>
|
||||
*/
|
||||
class Option extends Component {
|
||||
shouldComponentUpdate(/** @type {Option['props']} */ nextProps) {
|
||||
return nextProps.value !== this.props.value;
|
||||
}
|
||||
|
||||
render() {
|
||||
return h('option', this.props, this.props.value);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Wrapper around <input /> that doesn't update it while it's in focus to allow editing.
|
||||
*/
|
||||
class EditableInput extends Component {
|
||||
ref = createRef();
|
||||
|
||||
shouldComponentUpdate() {
|
||||
return document.activeElement !== this.ref.current;
|
||||
}
|
||||
|
||||
render(props) {
|
||||
return h('input', Object.assign(props, { ref: this.ref }));
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user