How to use flat () to achieve array flattening in JavaScript

Editor to share with you how to use flat () to achieve array flattening in JavaScript, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Array flattening refers to changing a multi-dimensional array into an one-dimensional array.

Const arr = [1, [2, [3, [4, 5]], 6]; / / = > [1, 2, 3, 4, 5, 6] use flat () const res1 = arr.flat (Infinity); what is the role 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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