JavaScript 中的 Object.fromEntries() 方法。

javascriptweb developmentobject oriented programming更新于 2025/8/21 7:40:17

JavaScript 中的 Object.fromEntries() 方法用于将可迭代对象(如数组、具有键值对的映射)转换为对象。

以下是 Object.fromEntries() 方法的代码 −

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;
   }
   .result,.sample {
      font-size: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>Object.fromEntries() method </h1>
<div
class="sample"><pre>[[firstName,Rohan],[lastName,Sharma],[age,22]]</pre></div>
<div style="color: green;" class="result">Object = <br></div>
<button class="btn">点击此处</button>
<h3>Click on the above button to convert the above array into object</h3>
<script>
   let resEle = document.querySelector(".result");
   let sampleEle = document.querySelector(".sample");
   let arr = [['firstName','Rohan'],['lastName','Sharma'],['age',22]];
   document.querySelector(".Btn").addEventListener("click", () => {
      let obj = Object.fromEntries(arr);
      for(i in obj){
         resEle.innerHTML += 'Key = '+i+' : Value = '+obj[i]+ '<br>';
      }
   });
</script>
</body>
</html>