다음은 JavaScript에서 객체가 클래스의 인스턴스인지 확인하는 코드입니다 -
예시
<!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>Check if an object is an instance of a Class</h1> <div class="result"></div> <button class="Btn">CLICK HERE</button> <h3>Click on the above button to check if student1 object is an instance of Student</h3> <script> let resEle = document.querySelector(".result"); function Student(name, age, standard) { this.name = name; this.age = age; this.standard = standard; } let student1 = new Student("Rohan", 18, 12); document.querySelector(".Btn").addEventListener("click", () => { if (student1 instanceof Student) { resEle.innerHTML = "student1 is instance of Student"; } else { resEle.innerHTML = "student1 is not an instance of Student"; } }); </script> </body> </html>
출력
'여기를 클릭' 버튼을 클릭하면 -