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<!DOCTYPE html> <html> <body> <h2>JavaScript 字符串方法</h2> <p>concat() 方法连接两个或多个字符串：</p> <p id="demo"></p> <script> var text1 = "Hello"; var text2 = "World!"; var text3 = text1.concat(" ",text2); document.getElementById("demo").innerHTML = text3; </script> </body> </html>