ต่อไปนี้เป็นโค้ดสำหรับลบคุณสมบัติอ็อบเจกต์ใน JavaScript
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,.sample { font-size: 20px; font-weight: 500; } </style> </head> <body> <h1>Delete object properties in JavaScript</h1> <div class="sample">Before Deleting <br /></div> <div style="color: green;" class="result">After deleting<br /></div> <button class="btn">CLICK HERE</button> <h3> Click on the above button to delete object properties </h3> <script> let btnEle = document.querySelector(".btn"); let resEle = document.querySelector(".result"); let sampleEle = document.querySelector(".sample"); let obj = { firstName: "Rohan", lastName: "Sharma", welcome() { return "Welcome " + this.firstName + " " + this.lastName; }, }; function beforeDelete() { sampleEle.innerHTML += "obj.firstName = " + obj.firstName + "<br>"; sampleEle.innerHTML += "obj.lastName = " + obj.lastName + "<br>"; sampleEle.innerHTML += "obj.welcome() = " + obj.welcome() + "<br>"; } beforeDelete(); btnEle.addEventListener("click", () => { delete obj.firstName; delete obj.lastName; delete obj.welcome; resEle.innerHTML += "obj.firstName = " + obj.firstName + "<br>"; resEle.innerHTML += "obj.lastName = " + obj.lastName + "<br>"; try { resEle.innerHTML += "obj.welcome() = " + obj.welcome() + "<br>"; } catch (err) { resEle.innerHTML += err; } }); </script> </body> </html>ผลลัพธ์
โค้ดข้างต้นจะสร้างผลลัพธ์ดังนี้ -
เมื่อคลิกปุ่ม 'CLICK HERE' -
