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• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

dotAll property indicates whether or not the " s " flag is used with the regular expression. dotAll is a read-only property of an individual regular expression instance.

特性属性在 RegExp.prototype.dotAll
可写	no
可枚举	no
可配置	yes

描述

值 dotAll 是 布尔 and true if the " s " flag was used; otherwise, false . The " s " flag indicates that the dot special character (" . ") should additionally match the following line terminator ("newline") characters in a string, which it would not match otherwise:

• U+000A LINE FEED (LF) (" \n ")
• U+000D CARRIAGE RETURN (CR) (" \r ")
• U+2028 LINE SEPARATOR
• U+2029 PARAGRAPH SEPARATOR

This effectively means the dot will match any character on the Unicode Basic Multilingual Plane (BMP). To allow it to match astral characters, the " u " (unicode) flag should be used. Using both flags in conjunction allows the dot to match any Unicode character, without exceptions.

You cannot change this property directly.

范例

使用 dotAll

var str1 = 'bar\nexample foo example';
var regex1 = new RegExp('bar.example','s');
console.log(regex1.dotAll); // Output: true
console.log(str1.replace(regex1,'')); // Output: foo example
var str2 = 'bar\nexample foo example';
var regex2 = new RegExp('bar.example');
console.log(regex2.dotAll); // Output: false
console.log(str2.replace(regex2,'')); // Output: bar
                                      //         example foo example
					

规范

规范
ECMAScript (ECMA-262) The definition of 'RegExp.prototype.dotAll' in that specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
dotAll	Chrome 62	Edge 79	Firefox 78	IE No	Opera 49	Safari 12	WebView Android 62	Chrome Android 62	Firefox Android No	Opera Android 46	Safari iOS 12	Samsung Internet Android 8.0	nodejs 8.10.0 8.10.0 8.3.0 Disabled Disabled From version 8.3.0: this feature is behind the --harmony runtime flag.

图例

完整支持

完整支持

不支持

不支持

用户必须明确启用此特征。

用户必须明确启用此特征。

另请参阅

• RegExp.lastIndex
• RegExp.prototype.global
• RegExp.prototype.ignoreCase
• RegExp.prototype.multiline
• RegExp.prototype.source
• RegExp.prototype.sticky
• RegExp.prototype.unicode

元数据

• 最后修改： Apr 27, 2020

相关话题

1. 标准内置对象
2. RegExp
3. 特性
   1. RegExp.$1-$9
   2. RegExp.input ($_)
   3. RegExp.lastMatch ($&)
   4. RegExp.lastParen ($+)
   5. RegExp.leftContext ($`)
   6. RegExp.prototype.dotAll
   7. RegExp.prototype.flags
   8. RegExp.prototype.global
   9. RegExp.prototype.ignoreCase
   10. RegExp.prototype.multiline
   11. RegExp.prototype.source
   12. RegExp.prototype.sticky
   13. RegExp.prototype.unicode
   14. RegExp.rightContext ($')
   15. RegExpInstance.lastIndex
   16. get RegExp[@@species]
4. 方法
   1. RegExp.prototype.compile()
   2. RegExp.prototype.exec()
   3. RegExp.prototype.test()
   4. RegExp.prototype.toSource()
   5. RegExp.prototype.toString()
   6. RegExp.prototype[@@matchAll]()
   7. RegExp.prototype[@@match]()
   8. RegExp.prototype[@@replace]()
   9. RegExp.prototype[@@search]()
   10. RegExp.prototype[@@split]()
5. 继承：
6. Function
7. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
8. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
9. Object
10. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
11. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()