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interface Action<T> {
  payload?: T;
  type: string;
}

class EffectModule {
  count = 1;
  message = "hello!";

  delay(input: Promise<number>) {

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<form id='myContactForm' action='https://cohan.me/that-needs-js/'
      data-action='https://cohan.me/your/actual/form/submit/url'>

<script>
    function updateContactFormDestination() {
        var contactForm = document.getElementById("myContactForm");
        var realSubmitUrl = contactForm.getAttribute('data-action');

 contactForm.setAttribute('action', realSubmitUrl);

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1. windows

set GIT_SSL_NO_VERIFY=true git clone

2. linux

env GIT_SSL_NO_VERIFY=true git push

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image: node:4.2.2

cache:
  paths:
  - node_modules/

stages:
  - test

test_async:

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lsof -i :端口 
kill -9 进程ID

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link: https://apple.stackexchange.com/questions/262355/xxx-cant-be-opened-you-should-move-it-to-trash-for-flash-projector-applica

solution:

This is actually a macOS Gatekeeper issue try these steps:

To resolute Gatekeeper issues on macOS Sierra you might have to partially or completely disable Gatekeeper checks.

• Option I, For a certain application run in Terminal:

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支持esm的浏览器我们可以不polyfill，反之我们才需要polyfill。 我们构建的时候需要打两份，如果将来规则更加细化，我们可以做到更加细致。当然这个东西可以做成服务化，类似polyfill.io

• build 两次，而且只在 build 阶段做，可以用 webpack 的多配置，也可以多 webpack 实例
• mjs 格式配 babel-preset-env 的 targets.esmodules 为 true
• HTML部分

<script type="module" src="bundle.mjs"></script>

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window.addEventListener('pointermove', event => {
    const events = event.getCoalescedEvents();
    for (let event of events) {
        const x = event.pageX;
        const y = event.pageY;
        // draw a line using x and y coordinates.
    }
});

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React是如何做到更新DOM，（focus）光标保持不变的？

• 更新之前 - getSelectionInformation
• 更新之后 - restoreSelection

代码： https://github.com/facebook/react/blob/f887d1aa27336baa0bc292158793a5a244c712b6/packages/react-dom/src/client/ReactInputSelection.js

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function check_webp_feature(feature, callback) {
    var kTestImages = {
        lossy: "UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA",
        lossless: "UklGRhoAAABXRUJQVlA4TA0AAAAvAAAAEAcQERGIiP4HAA==",
        alpha: "UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAARBxAR/Q9ERP8DAABWUDggGAAAABQBAJ0BKgEAAQAAAP4AAA3AAP7mtQAAAA==",
        animation: "UklGRlIAAABXRUJQVlA4WAoAAAASAAAAAAAAAAAAQU5JTQYAAAD/////AABBTk1GJgAAAAAAAAAAAAAAAAAAAGQAAABWUDhMDQAAAC8AAAAQBxAREYiI/gcA"
    };
    var img = new Image();
    img.onload = function () {
        var result = (img.width > 0) && (img.height > 0);