執行 ❯
建立您
自己的
網站
×
改變方向
儲存程式碼
改變主題，暗/亮
前往 Spaces
<!DOCTYPE html> <html> <body> <h1>JavaScript Arrays</h1> <h2>The indexOf() Method</h2> <p>indexOf() returns the position of a specified value in an array.</p> <p>Search for "Apple", starting at the end:</p> <p id="demo"></p> <script> const fruits = ["Banana", "Orange", "Apple", "Mango", "Apple"]; let index = fruits.indexOf("Apple", -1); document.getElementById("demo").innerHTML = index; </script> </body> </html>
