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This article mainly shows you "JavaScript how to use extend function", the content is easy to understand, clear, hope to help you solve doubts, the following let Xiaobian lead you to study and learn "JavaScript how to use extend function" this article.

Extend: blending attributes into the target object

Function extend (to, _ form) {for (let key in _ form) {to [key] = _ form [key];} return to} what is the function of JavaScript 1, can embed dynamic text in HTML pages. 2. Respond to browser events. 3. Read and write HTML elements. 4. Verify the data before it is submitted to the server. 5. Detect the browser information of visitors. 6. Control cookies, including creation and modification, etc. 7. Server-side programming based on Node.js technology.

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