<!DOCTYPE html>html
<html>前端
<head>web
<meta charset="utf-8">數組
<title></title>ui
</head>htm
<body>blog
<p id="demo">點擊按鈕截取數組下標 1 到 2 的元素。</p>ip
<button onclick="myFunction()">點我</button>utf-8
<script>ci
function myFunction(){
var fruits = ["語文", "數學", "英文", "地理", "歷史"];
var citrus = fruits.slice(1,3);
var x=document.getElementById("demo");
x.innerHTML=citrus;
}
</script>
</body>
</html>
2 splice 從數組中添加或刪除元素
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<p id="demo">點擊按鈕向數組添加元素。</p>
<button onclick="myFunction()">點我</button>
<script>
function myFunction(){
var fruits = ["語文", "數學", "英文", "地理", "歷史"];
fruits.splice(2,0,"美術","體育");
var x=document.getElementById("demo");
x.innerHTML=fruits;
}
</script>
</body>
</html>
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