JavaScript 中拼接数组是什么意思?举例说明

javascriptweb developmentobject oriented programming

拼接数组是指使用 Array.splice() 方法在数组中添加或删除项。删除的项将作为数组返回。

以下是 JavaScript 中拼接数组的代码 −

示例

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .sample,.result {
      font-size: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>Splicing an array in JavaScript</h1>
<div class="sample"></div>
<div style="color: green;" class="result"></div>
<button class="btn">点击此处</button>
<h3>
Click on the above button to add items after second element
</h3>
<script>
   let fillEle = document.querySelector(".sample");
   let resEle = document.querySelector(".result");
   let arr = [1, 3, 5, 7, 9, 11];
   fillEle.innerHTML = arr;
   document.querySelector(".Btn").addEventListener("click", () => {
      arr.splice(2, 0, "A", "B", "C", "D", "E");
      resEle.innerHTML = "Spliced array = " + arr;
   });
</script>
</body>
</html>