JavaScript 中的 RegExp 对象。
RegExp 对象用于通过搜索和提取文本部分来对文本进行模式匹配。RegExp 对象可以通过 regexp 构造函数或文字语法创建。
以下是 JavaScript 中 RegExp 对象的代码 −
示例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> <style> body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result, .sample { font-size: 20px; font-weight: 500; } </style> </head> <body> <h1>RegExp object</h1> <div class="sample"></div> <div style="color: green;" class="result"></div> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to test the regex expression</h3> <script> let sampleEle = document.querySelector(".sample"); let resEle = document.querySelector(".result"); let str = "Hello world. This is a beautiful world"; sampleEle.innerHTML = str; let pattern = new RegExp("world"); document.querySelector(".Btn").addEventListener("click", () => { resEle.innerHTML += "pattern.test(str) = " + pattern.test(str) + "<br>"; resEle.innerHTML += "pattern.exec(str) = " + pattern.exec(str) + "<br>"; }); </script> </body> </html>
输出
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