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This article mainly introduces how JavaScript uses Object.keys() to judge empty, which has certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let Xiaobian take you to understand it together.

Object.keys() is null

Use arrays as a basis for judgment

let stuArray = Object.getOwnPropertyNames(obj) console.log (stuArray.length === 0) What JavaScript does 1. Ability to embed dynamic text in HTML pages. Responding to browser events. Read and write HTML elements. Verify data before it is submitted to the server. 5. Detect the browser information of visitors. Control cookies, including creation and modification. 7. Server-side programming based on Node.js technology.

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