constparagraphRegex=/[^.!?]+[.!?]/g; 30.匹配JavaScript注释: constjsCommentRegex=/\/\/.*|\/\*[\s\S]*\*\//g; 31.全是空白行的段落: constemptyLinesRegex=/^\s*$/gm; 32.HTML注释: consthtmlCommentRegex=/<!--[\s\S]*?-->/g; 33.包含n
1^// Start at the beginning2[_a-zA-Z0-9-]// Define a group3+// One or more times4(// Group 15\.// a "real" dot6[_a-zA-Z0-9-]// Another group7+// One or more times8)// /* End group 1 */9*// Group optional or multiple times10@// The @ character11[a-zA-Z0-...
// Remove whitespace from the text, and convert to upper case text = text.replace(/\s/g, "").toUpperCase(); // Now loop through the characters of the text for(let character of text) { let count = this.letterCounts.get(character); // Get old count this.letterCounts.set(character, ...
In JavaScript, you can use regular expressions (regex) to work with space characters. The space character itself can be represented in regex using the\smetacharacter. Here’s the syntax for using the space character in regex: Using theRegExpconstructor: const regex = new RegExp("\\s"); No...
The funcions include test, match, matchAll, search, and replace. The following table shows some regular expressions: RegexMeaning . Matches any single character. ? Matches the preceding element once or not at all. + Matches the preceding element once or more times. * Matches the preceding ...
\s JavaScript RegEx 1 match JavaScriptRegEx No match \S - Matches where a string contains any non-whitespace character. Equivalent to [^ \t\n\r\f\v]. ExpressionStringMatched? \S a b 2 matches (at a b) No match \w - Matches any alphanumeric character (digits and alphabets). Equivale...
如果您还在使用更老一点的 Babel 7.x 版本,需要用`babel`转译插件@babel/plugin-proposal-unicode-property-regex的底层将带有属性转义的正则表达式转为 Unicode 码点正则表达式或者 ES 5 的正则表达式。转译结果的在线演示可以在这里查看,用户可以自己在上面转译其他的 Unicode 属性转义正则表达式。我们在这里列举`/\p...
Lint 规则 no-control-regex 已打开。 字符串中的表达式未正确转义,因此包含控制字符。请参见以下代码: // This prints: ^[0-9a-zA-Z]+$ // Notice that the space character and \b is missing console.log("^[0-9a-zA-Z \b]+$") 修复错误的正确方法是正确转义字符串。 let regex = new Reg...
if (input.match(regex)) { return true; } else { return false; } }, //验证只包含数字和英文字母 IsIntegerAndEnglishCharacter: function (input) { var regex = /^[0-9A-Za-z]+$/; if (input.match(regex)) { return true; } else { ...
正则表达式是一种文本模式,包括普通字符(例如,a 到 z 之间的字母)和特殊字符(称为“元字符”)。模式描述在搜索文本时要匹配的一个或多个字符串。