paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

naholyr

Install

Clone the repo and drop the folder into "chrome://extensions" page.

Use

Open any web page ("about:blank" will work too) and a console, then inspect and play with MY_API global variable.

akaramires

// getCookie(), setCookie(), deleteCookie()


// возвращает cookie если есть или undefined
function getCookie(name) {

    var matches = document.cookie.match(new RegExp(
      "(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"
    ))
    return matches ? decodeURIComponent(matches[1]) : undefined

6174

 //http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
 Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);

SunboX

function worker() {
  setInterval(function() {
    postMessage({foo: "bar"});
  }, 1000);
}

var code = worker.toString();
code = code.substring(code.indexOf("{")+1, code.lastIndexOf("}"));

var blob = new Blob([code], {type: "application/javascript"});

andrusha

var nodes = document.querySelectorAll(".audio_remove"), i = 0, inter = setInterval( function() { if (i == nodes.length) { clearInterval(inter);}; var evt = document.createEvent("MouseEvents"); evt.initMouseEvent("click", true, true, nodes[i],  0, 0, 0, 0, 0, false, false, false, false, 0, null); nodes[i].dispatchEvent(evt); i++; }, 350);

demonixis

var MathHelper = {
    // Get a value between two values
    clamp: function (value, min, max) {

        if (value < min) {
            return min;
        }
        else if (value > max) {
            return max;
        }