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JS 参考手册

JS 参考手册(字母排序)

JavaScript

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alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundClip backgroundColor backgroundImage backgroundOrigin backgroundPosition backgroundRepeat backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide caretColor clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cssFloat cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex

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HTML 对象


JavaScript 正则表达式捕获组 (x)


示例

let text = "Haha, haha, haha.";
const pattern = /(haha)+/;

let result = text.match(pattern);
亲自试一试 »

解释

  • (haha) 表示一组字符
  • (haha)+ 表示匹配零个或多个该字符组
  • text.match() 返回一个结果数组
  • match.groups() 返回一个匹配项数组

语法

new RegExp("(x)")

或者:

/(x)/

正则表达式方法

正则表达式的搜索替换可以使用不同的方法。

以下是最常用的方法:

字符串方法

方法 描述
match(regex) 返回结果数组
matchAll(regex) 返回结果迭代器
replace(regex) 返回新字符串
replaceAll(regex) 返回一个新的字符串
search(regex) 返回第一个匹配项的索引
split(regex) 返回一个结果数组

正则表达式方法

方法 描述
regex.exec() 返回结果迭代器
regex.test() 返回 true 或 false

浏览器支持

/(x)/ 是 ECMAScript 1(JavaScript 1997)的一项特性。

所有浏览器均支持此功能:

Chrome Edge Firefox Safari Opera

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