在數組的開頭添加新元素 - unshift()
源代碼:
<!DOCTYPE html> <html> <body> <p id="demo">Click the button to add elements to the array.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.unshift("Lemon","Pineapple"); var x=document.getElementById("demo"); x.innerHTML=fruits; } </script> <p><b>Note:</b> The unshift() method does not work properly in Internet Explorer 8 and earlier, the values will be inserted, but the return value will be <em>undefined</em>.</p> </body> </html>
測試結果:
Lemon,Pineapple,Banana,Orange,Apple,Mango
在數組的第2位置添加一個元素 - splice()
源代碼:
<!DOCTYPE html> <html> <body> <p id="demo">Click the button to add elements to the array.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.splice(2,0,"Lemon","Kiwi"); var x=document.getElementById("demo"); x.innerHTML=fruits; } </script> </body> </html>
測試結果:
Banana,Orange,Lemon,Kiwi,Apple,Mango
數組的末尾添加新的元素 - push()
源代碼:
<!DOCTYPE html> <html> <body> <p id="demo">Click the button to add a new element to the array.</p> <button onclick="myFunction()">Try it</button> <script> var fruits = ["Banana", "Orange", "Apple", "Mango"]; function myFunction() { fruits.push("Kiwi") var x=document.getElementById("demo"); x.innerHTML=fruits; } </script> </body> </html>
測試結果:
Banana,Orange,Apple,Mango,Kiwi