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mrenty / coverage.js
Created February 27, 2018 08:04 — forked from ebidel/coverage.js
CSS/JS code coverage during lifecycle of page load
/**
* @author ebidel@ (Eric Bidelman)
* License Apache-2.0
*
* Shows how to use Puppeeteer's code coverage API to measure CSS/JS coverage across
* different points of time during loading. Great for determining if a lazy loading strategy
* is paying off or working correctly.
*
* Install:
* npm i puppeteer chalk cli-table
if (typeof window!=='undefined' && navigator.serviceWorker && navigator.serviceWorker.controller) {
let reloadOnNext = false;
let pushState = history.pushState;
history.pushState = function(state, title, url) {
if (reloadOnNext===true) location.href = url;
else pushState.call(this, state, title, url);
};
navigator.serviceWorker.controller.addEventListener('statechange', e => {
// Detect if AirPlay is available
// Mac OS Safari 9+ only
if (window.WebKitPlaybackTargetAvailabilityEvent) {
video.addEventListener('webkitplaybacktargetavailabilitychanged', function(event) {
switch (event.availability) {
case "available":
airPlay.style.display = 'block';
break;
default:
const combine = (...arrays)
=> [].concat(...arrays);
const compact = arr
=> arr.filter(el => el);
const contains = (() => Array.prototype.includes
? (arr, value) => arr.includes(value)
: (arr, value) => arr.some(el => el === value)
)();