Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <p>单击该按钮可检查字符串是否以指定值开头。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <p><strong>注意：</strong> IE 11（及更早版本）不支持 startsWith() 方法。</p> <script> function myFunction() { var str = "Hello world, welcome to the universe."; var n = str.startsWith("Hello"); document.getElementById("demo").innerHTML = n; } </script> </body> </html>