Dot Notation ใช้สำหรับเข้าถึงคุณสมบัติ (Properties) ของออบเจ็กต์ใน JavaScript ตัวอย่างโค้ดด้านล่างแสดงการใช้งาน Dot Notation
ตัวอย่าง
<!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">CLICK HERE</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>ผลลัพธ์
เมื่อคลิกปุ่ม ‘CLICK HERE’ −
