概述
normalize() 方法会按照指定的一种 Unicode 正规形式将当前字符串正规化。(如果该值不是字符串,则首先将其转换为一个字符串)。
语法
str.normalize([form])
;
参数
-
form
-
四种 Unicode 正规形式 "NFC", "NFD", "NFKC", 以及 "NFKD" 其中的一个, 默认值为 "NFC".
- NFC - Normalization Form Canonical Composition.
- NFD - Normalization Form Canonical Decomposition.
- NFKC - Normalization Form Compatibility Composition.
- NFKD - Normalization Form Compatibility Decomposition.
返回值
含有给定字符串的Unicode规范化形式的字符串。
可能出现的异常
-
RangeError
-
如果给
form
传入了非法的参数值, 则会抛出RangeError
异常.
描述
The normalize()
方法返回字符串的指定Unicode规范化形式。它不影响字符串本身的值。
示例
使用 normalize()
// Initial string // U+1E9B: LATIN SMALL LETTER LONG S WITH DOT ABOVE // U+0323: COMBINING DOT BELOW var str = "\u1E9B\u0323"; // Canonically-composed form (NFC) // U+1E9B: LATIN SMALL LETTER LONG S WITH DOT ABOVE // U+0323: COMBINING DOT BELOW str.normalize("NFC"); // "\u1E9B\u0323" str.normalize(); // same as above // Canonically-decomposed form (NFD) // U+017F: LATIN SMALL LETTER LONG S // U+0323: COMBINING DOT BELOW // U+0307: COMBINING DOT ABOVE str.normalize("NFD"); // "\u017F\u0323\u0307" // Compatibly-composed (NFKC) // U+1E69: LATIN SMALL LETTER S WITH DOT BELOW AND DOT ABOVE str.normalize("NFKC"); // "\u1E69" // Compatibly-decomposed (NFKD) // U+0073: LATIN SMALL LETTER S // U+0323: COMBINING DOT BELOW // U+0307: COMBINING DOT ABOVE str.normalize("NFKD"); // "\u0073\u0323\u0307"
规范
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) String.prototype.normalize |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) String.prototype.normalize |
Draft |
浏览器兼容性
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Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 34 | 31 (31) | 未实现 | 未实现 | 未实现 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | 未实现 | 34 | 未实现 bug 864843 |
未实现 | 未实现 | 未实现 |