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Next Section： Dynamically add, modify, and delete properties and methods of JS objects
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JavaScript in-depth video tutorial
Chapter1 JavaScript in depth
1-1 Define classes by defining functions
1-2 Use the new operator to obtain an instance of a class
1-3 Dynamically add, modify, and delete properties and methods of JS objects
1-4 Use square brackets ([ ]) to refer to object properties and methods
1-5 Create untyped objects using brace ({ }) syntax
1-6 prototype prototype object
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notes
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![Front-end project-Shangyou [HTML/CSS/JS technology comprehensive practice]](https://img.php.cn/upload/course/000/000/068/63bfcb2974f91471.jpg)
![Zero-based front-end course [Vue advanced learning and practical application]](https://img.php.cn/upload/course/000/000/068/63bbd15353895588.jpg)
![WEB front-end tutorial [HTML5+CSS3+JS]](https://img.php.cn/upload/course/000/000/068/63ba60c8da520536.jpg)
![Apipost practical application [api, interface, automated testing, mock]](https://img.php.cn/upload/course/000/000/068/63b3c967a20f4861.jpg)
