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copy_paste.html
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copy_paste.html
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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Copy/Paste Test</title>
<style>
/* css reset */
html {
box-sizing: border-box;
font-size: 16px;
}
*, *:before, *:after {
box-sizing: inherit;
}
body, h1, h2, h3, h4, h5, h6, p, ol, ul {
margin: 0;
padding: 0;
font-weight: normal;
}
ol, ul {
list-style: none;
}
img {
max-width: 100%;
height: auto;
}
/* grid */
pre {
margin: 0;
}
body {
height: calc(100svh - 1rem);
display: grid;
gap: 0.5rem;
margin: 0.5rem;
grid-template-rows: repeat(3, min-content) 1fr;
}
div#counts, div#log {
background-color: #eee;
font-size: 10px;
}
body > div:last-of-type {
overflow: scroll;
}
</style>
</head>
<body>
<div>
<img src="https://web-dev.imgix.net/image/admin/urYfROhm806fvOPRMsRg.jpg?auto=format&h=100"></img>
<input type="button" value="Clicky"></input>
<input id="checky" type="checkbox">Enable JS Handlers</input>
<input id="loggy" type="checkbox">Enable Logging</input>
<div>
Use the Image above to drag, or long press for contextmenu.
Or, highlight this text and longpress to drag.
</div>
</div>
<input type=text placeholder="Typey" autofocus></input>
<div id="counts"></div>
<div id="log"></div>
<script type=module>
import { measureResponsiveness, estimateInteractionCountsByEventCounts } from './responsiveness.js';
import { getLCP, getFID, getINP, getCLS } from './web-vitals.js';
getCLS(console.log);
getFID(console.log);
getINP(console.log, true);
getLCP(console.log);
const EVENTS = [
"keydown",
"keyup",
"keypress",
"pointerdown",
"pointerup",
"pointercancel",
// "touchstart",
// "touchend",
// "touchcancel",
"mousedown",
"mouseup",
// "gotpointercapture",
// "lostpointercapture",
"click",
"dblclick",
"auxclick",
"contextmenu",
// "pointerleave",
// "pointerout",
// "pointerover",
// "pointerenter",
// "mouseout",
// "mouseover",
// "mouseleave",
// "mouseenter",
// "lostpointercapture",
"dragstart",
"dragend",
// "dragenter",
// "dragleave",
// "dragover",
"drop",
// "beforeinput",
// "input",
"compositionstart",
"compositionupdate",
"compositionend",
];
let enableLog = true;
function replaceConsole() {
var log = console.log.bind(console);
var group = console.group.bind(console);
console.log = function (...args) {
log(...args);
let el = document.getElementById('log');
if (enableLog) {
el.innerHTML += `<pre>${args.join(' ')}<pre>`;
el.scrollTop = el.scrollHeight;
}
}
console.group = function (...args) {
group(...args);
let el = document.getElementById('log');
// el.innerHTML += `<hr/>`;
}
}
function reportEvents() {
const observer = new PerformanceObserver(list => {
const entries = list.getEntries().filter(entry => EVENTS.includes(entry.name));
if (entries.length == 0) return;
console.group();
for (let entry of entries) {
const renderTime = Math.round((entry.startTime + entry.duration) / 8) * 8;
console.log(`renderTime:${renderTime} ${entry.name} id:${entry.interactionId}`);
}
console.groupEnd();
});
observer.observe({
type: "event",
durationThreshold: 0, // 16 minumum by spec
buffered: true
});
}
replaceConsole();
reportEvents();
let currentINP;
getINP((metric) => {
currentINP = metric;
}, true);
setInterval(() => {
const counts = {
inp: currentINP?.value,
count: currentINP?.entries.length,
...estimateInteractionCountsByEventCounts(),
};
document.getElementById('counts').innerHTML = `<div><pre>${JSON.stringify(counts,null,2)}<pre></div>`;
}, 100);
const HANDLER_BLOCK_TIME = 20; // ms
const RAF_BLOCK_TIME = 20; // ms
function randomColor() {
return `#${Math.floor(Math.random()*16777215).toString(16)}`;
}
function block(ms) {
// console.log(`Starting to sync block for ${ms}ms`);
const end = performance.now() + ms;
while (performance.now() < end);
}
function blockingRaf(ms) {
requestAnimationFrame((time) => {
// console.log('Starting rAF handler');
block(ms);
});
}
function keepBusy(event) {
block(HANDLER_BLOCK_TIME);
blockingRaf(RAF_BLOCK_TIME);
document.body.style['background-color'] = randomColor();
}
// function addPreventDefault(handler) {
// return (...args) => {
// handler(...args);
// event.preventDefault();
// };
// }
const handler = (event) => {
console.log(`timeStamp:${event.timeStamp.toFixed(2)} ${event.type}`);
keepBusy();
}
function addHandlers() {
for (let event of EVENTS) {
document.addEventListener(event, handler);
}
}
function removeHandlers() {
for (let event of EVENTS) {
document.removeEventListener(event, handler);
}
}
const checky = document.getElementById('checky');
checky.addEventListener('change', (event) => {
if (event.target.checked) {
addHandlers();
} else {
removeHandlers();
}
});
checky.click();
const loggy = document.getElementById('loggy');
loggy.addEventListener('change', (event) => {
enableLog = event.target.checked;
event.stopPropagation();
event.preventDefault();
});
loggy.click();
</script>
</body>
</head>