.. -*- coding: utf-8; -*-
=============
JavaScript.
=============
.. contents::
:local:
About JS
========
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Language_Resources
Links to ECMA 262 specs.
HTML.
=====
``<noscript>`` tag used to render HTML if JavaScript disabled in browser.
Including JavaScript in HTML page.
==================================
In ``head``::
<html>
<head>
<script type="text/javascript" src="abc.js"></script>
</head>
...
<html>
or alternatively just before closing ``body``::
<script src="abc.js"></script>
</body>
<html>
.. note:: HTML 5 makes ``type="text/javascript"`` unnecessary.
Inlining JavaScript in HTML code.
=================================
::
<html>
<h1>Hello!<h1/>
<script language="javascript">
<!--
alert("Hello!")
document.write("sin(10) = " + Math.sin(10))
//-->
</script>
</html>
Reduce js code size.
====================
http://crockford.com/javascript/jsmin
The JavaScript Minifier
http://developer.yahoo.com/yui/compressor/
YUI Compressor
JavaScript standards.
=====================
http://www.ecma-international.org/publications/standards/Ecma-262.htm
ECMAScript Language Specification.
http://www.ecma-international.org/publications/standards/Ecma-262-arch.htm
ECMAScript Language Specification.
http://www.ecma-international.org/publications/standards/Ecma-327.htm
ECMAScript 3rd Edition Compact Profile
http://www.ecma-international.org/publications/standards/Ecma-357.htm
ECMAScript for XML (E4X) Specification.
http://www.ecma-international.org/publications/standards/Ecma-290.htm
ECMAScript Components Specification.
JavaScript versions.
====================
JavaScript 1.5 was introduced back in 1999.
https://developer.mozilla.org/en-US/docs/JavaScript/Reference#JavaScript.2FBrowser_support_history
List of versions with CHANGES.
http://en.wikipedia.org/wiki/Javascript#Versions
List of versions per browser.
http://en.wikipedia.org/wiki/ECMAScript#Version_correspondence
List of versions.
http://kangax.github.io/compat-table/es5/
ECMAScript 5 compatibility table.
http://kangax.github.io/compat-table/es6/
ECMAScript 6 compatibility table.
http://kangax.github.io/compat-table/es7/
ECMAScript 7 compatibility table.
http://caniuse.com/use-strict
Can I use ECMAScript 5 Strict Mode?
Level of feature support in JS engines
======================================
https://kangax.github.io/compat-table/es6/
ES6 compatibility table.
http://node.green/
Node.js features.
https://fhinkel.rocks/six-speed/
Performance of ES6 features relative to the ES5 baseline operations.
Pretty print from JavaScript.
=============================
::
console.debug("%o", obj);
Logging in JS.
==============
To Web Developer console (Firefox/Chrome)::
console.log("str");
console.info("str is %s", "str");
console.warn("this is %o", this);
console.error("int: %i, float: %f, string: %s, object: %o", 2, .333, "str", this);
To see stack-trace use::
console.trace();
console.log(new Error().stack); // only FF
XML from JavaScript.
====================
Powerful, standards-compliant JavaScript XML parser that is designed to help web application
designers implement cross platform applications that take advantage of client-side manipulation of
XML data. XML for <SCRIPT> provides a full suite of tools, including:
* A standards-compliant W3C DOM Level 2 processor
* An XPath processor
* A standards-compliant SAX processor
* A simple (classic) DOM processor
* Proxies for XML retrieval from any domain
* Utilities for XML and application development
http://xmljs.sourceforge.net/
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