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

Use the instanceof operator

The instanceof operator checks whether the constructor is found in the prototype chain of the object.

Like the typeof operator, it returns a Boolean value. To determine whether a variable is an array, you can use instanceof, as follows:

Let result = {subject: "Science", marks: 97}; let numbers = [1,2,3,4,5]; let name = "Mark"; let names = new Array ("Xiao Zhi", "Xiao Li", "Xiao Wu"); console.log (result instanceof Array); / / falseconsole.log (numbers instanceof Array); / / trueconsole.log (name instanceof Array); / / falseconsole.log (names instanceof Array) / / true above is all the content of the article "how JavaScript uses the instanceof operator". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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