Encoding in javascript
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This document discusses JavaScript encoding and how: 1) ECMAScript source text uses UTF-16 encoding and is normalized to Unicode Normal Form C. Implementations are not required to perform normalization. 2) JavaScript programs can use the full Unicode character set according to ECMAScript v3, though older versions only allowed Unicode in comments and strings. 3) Code uses code points, not bytes, and examples show using Unicode characters in variable and method names and alerts.
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Encoding in javascript
- 2. Encoding in JavaScriptfahai [at] TaobaoUED
- 3. ECMA 262 - §6ECMAScript source text is represented as a sequence of characters in the Unicode character encoding, version 2.1 or later, using the UTF-16 transformation format. The text is expected to have been normalised to Unicode Normalised Form C (canonical composition), as described in Unicode Technical Report #15.Conforming ECMAScript implementations are not required to perform any normalisation of text, or behave as though they were performing normalisation of text, themselves.
- 4. SourceCharacter :: any Unicode character
- 5. Rhino Book - §3.2JavaScript programs are written using the Unicode character set.Although the ECMAScript v3 standard allows Unicode characters anywhere in a JavaScript program, versions 1 and 2 of the standard allow Unicode characters only in comments and quoted string literals; all elements are restricted to the ASCII character set. Versions of JavaScript that predate ECMAScript standardization typically do not support Unicode at all.
- 7. Examplevar草泥马 = function() {this.constructor.prototype.咆哮 = function(叫声) { alert(叫声); };};new 草泥马().咆哮("除尽天下河蟹日，家祭无忘告乃翁！");
- 8. Examplealert(String.fromCharCode(35201, 21644, 35856, 65292, 35201, 26377, 29233));
- 10. ReferenceECMAScript Specification - 3rd EditionJavaScript - The Definition Guide - 5th Edition
- 11. Thanks