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<!DOCTYPE html> <html> <body> <p>单击该按钮可比较当前语言环境中的两个字符串。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var str1 = "cd"; var str2 = "ab"; var n = str1.localeCompare(str2); document.getElementById("demo").innerHTML = n; } </script> </body> </html>