string.normalize
string.normalize
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.
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
包含给定字符串的Unicode规范化表单的字符串。
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
该normalize()方法返回字符串的指定Unicode规范化表单。它不会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)The definition of 'String.prototype.normalize' in that specification. | Standard | Initial definition. |
| ECMAScript Latest Draft (ECMA-262)The definition of 'String.prototype.normalize' in that specification. | Draft | |
浏览器兼容性
| Feature | Chrome | Firefox | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | 34 | 31 | (Yes) | (No) | (Yes) | 10 |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | (No) | 34 | (Yes) | (No) | (No) | (Yes) | 10 |
