<!DOCTYPE html> <html> <body> <h1>JavaScript 字符串</h1> <h2>replaceAll() 方法</h2> <p>ES2021 引入了字符串方法 replaceAll():</p> <p id="demo"></p> <script> let text = "I love cats. Cats are very easy to love. Cats are very popular"; text = text.replaceAll(/Cats/g,"Dogs"); text = text.replaceAll(/cats/g,"dogs"); document.getElementById("demo").innerHTML = text; </script> </body> </html>