js.rst
author Oleksandr Gavenko <gavenkoa@gmail.com>
Fri, 05 Sep 2014 00:55:32 +0300
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child 1906 6f6d48f88341
permissions -rw-r--r--
ECMAScript 6/7 compatibility table.
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.. -*- coding: utf-8; -*-
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.. include:: HEADER.rst
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=============
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 JavaScript.
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=============
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.. contents ::
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HTML.
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=====
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``<noscript>`` tag used to render HTML if JavaScript disabled in browser.
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Including JavaScript in HTML page.
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==================================
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In ``head``::
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  <html>
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    <head>
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      <script type="text/javascript" src="abc.js"></script>
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    </head>
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   ...
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  <html>
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or alternatively just before closing ``body``::
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    <script src="abc.js"></script>
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  </body>
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  <html>
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**NOTE** ``type="text/javascript"`` no longer necessary.
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Inlining JavaScript in HTML code.
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=================================
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::
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  <html>
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    <h1>Hello!<h1/>
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    <script language="javascript">
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      <!--
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      alert("Hello!")
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      document.write("sin(10) = " + Math.sin(10))
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      //-->
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    </script>
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  </html>
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Reduce js code size.
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====================
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  http://crockford.com/javascript/jsmin
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                The JavaScript Minifier
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  http://developer.yahoo.com/yui/compressor/
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                YUI Compressor
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JavaScript standards.
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=====================
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  http://www.ecma-international.org/publications/standards/Ecma-262.htm
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                ECMAScript Language Specification.
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  http://www.ecma-international.org/publications/standards/Ecma-262-arch.htm
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                ECMAScript Language Specification.
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  http://www.ecma-international.org/publications/standards/Ecma-327.htm
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                ECMAScript 3rd Edition Compact Profile
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  http://www.ecma-international.org/publications/standards/Ecma-357.htm
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                ECMAScript for XML (E4X) Specification.
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  http://www.ecma-international.org/publications/standards/Ecma-290.htm
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                ECMAScript Components Specification.
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JavaScript versions.
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====================
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JavaScript 1.5 was introduced back in 1999.
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  https://developer.mozilla.org/en-US/docs/JavaScript/Reference#JavaScript.2FBrowser_support_history
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                List of versions with CHANGES.
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  http://en.wikipedia.org/wiki/Javascript#Versions
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                List of versions per browser.
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  http://en.wikipedia.org/wiki/ECMAScript#Version_correspondence
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                List of versions.
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  http://kangax.github.io/compat-table/es5/
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                ECMAScript 5 compatibility table.
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  http://kangax.github.io/compat-table/es6/
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                ECMAScript 6 compatibility table.
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  http://kangax.github.io/compat-table/es7/
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                ECMAScript 7 compatibility table.
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  http://caniuse.com/use-strict
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                Can I use ECMAScript 5 Strict Mode?
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Pretty print from JavaScript.
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=============================
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::
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  console.debug("%o", obj);
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Logging in JS.
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==============
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To Web Developer console (Firefox/Chrome)::
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  console.log("str");
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  console.info("str is %s", "str");
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  console.warn("this is %o", this);
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  console.error("int: %i, float: %f, string: %s, object: %o", 2, .333, "str", this);
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To see stack-trace use::
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  console.trace();
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  console.log(new Error().stack); // only FF
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XML from JavaScript.
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====================
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Powerful, standards-compliant JavaScript XML parser that is designed to help web application
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designers implement cross platform applications that take advantage of client-side manipulation of
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XML data. XML for <SCRIPT> provides a full suite of tools, including:
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 * A standards-compliant W3C DOM Level 2 processor
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 * An XPath processor
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 * A standards-compliant SAX processor
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 * A simple (classic) DOM processor
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 * Proxies for XML retrieval from any domain
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 * Utilities for XML and application development
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  http://xmljs.sourceforge.net/
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                home page
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