I am checking out the "Promises/A+" Specification, but could not understand the following things:  On Section 1. Terminology,  1.1. "promise” is an object or function with a then method whose behavior conforms to this specification....
I've recently been playing with the Javascript Fetch API. As far as I understand, by default all redirects are handled transparently and in the end I get a response from the last call in the redirect chain.  However, I could invoke fetch with {re...
Using prompt() I am generating some html to and need to know the maximum length that I can put in the popup.  I can't find anything in the spec about this, wondering if someone can help...
Today I tested what happens when you use getBoundingClientRect() on an SVG element that has been rotated.   Test: http://phrogz.net/svg/getBoundingClientRect-on-rotated-elements.html  The result is that:   Chrome, Safari, Opera, and IE appear to calc...
I'm wondering if there is any build-in support for the HTML5 Notification feature in Gecko browsers so far? Maybe some hidden developer thingy ?  I'm aware of WebKits window.webkitNotifications which works great, so, is there a Firefox implem...
I received an issue on GitHub about my ES2015 module import/export validating plugin for ESLint not recognizing the default export in the following syntax:  export {      foo as default,     bar }   where my plugin will lint the following (equivalent...
I am wondering about this topic for quite a while. The methods in question are the following:   getElementsByTagName getElementsByClassName getElementsByName querySelectorAll   As far as I know, those DOM methods are the only methods which are able t...
Quick question out of curiosity:  code below works in Firefox and Chrome but not in Safari. Is this Javascript spec circumvented by Firefox and Chrome or is this a quirk in Safari?    var a = {};  a.var = "test";   in all (firefox, safari and...
MDN has the following to say about fullscreenEnabled:     The fullscreenEnabled attribute tells you whether or not the document is currently in a state that would allow fullscreen mode to be requested.   I take this to mean: the property holds whenev...

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