JavaScript 中的点符号

javascriptweb developmentobject oriented programming更新于 2025/9/2 9:48:17

JavaScript 中使用点符号来访问对象属性。以下是实现点符号的代码 −

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 {
      font-size: 20px;
      font-weight: 500;
      color: blueviolet;
   }
</style>
</head>
<body>
<h1>Dot notation in JavaScript.</h1>
<div class="result"></div>
<button class="btn">点击此处</button>
<h3>Click on the above button to access the student1 object properties using dot notation</h3>
<script>
   let resEle = document.querySelector(".result");
   let BtnEle = document.querySelector(".Btn");
   function Student(name, age, standard) {
      this.name = name;
      this.age = age;
      this.standard = standard;
   }
   let student = new Student("Rohan", 18, 12);
   BtnEle.addEventListener("click", () => {
      resEle.innerHTML = "student1.name = " + student1.name + "<br>";
      resEle.innerHTML += "student1.age = " + student1.age + "<br>";
      resEle.innerHTML += "student1.standard = " + student1.standard + "<br>";
   });
</script>
</body>
</html>