.. -*- 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 Minifierhttp://developer.yahoo.com/yui/compressor/ YUI CompressorJavaScript 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 Profilehttp://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 FFXML from JavaScript.====================Powerful, standards-compliant JavaScript XML parser that is designed to help web applicationdesigners implement cross platform applications that take advantage of client-side manipulation ofXML 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 developmenthttp://xmljs.sourceforge.net/ home page