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This article mainly shows you "how to use the Array.unshift method and expand the operator copy array in JavaScript", the content is easy to understand, clear, hope to help you solve the doubt, the following let the editor lead you to study and learn "how to use the Array.unshift method and expand the operator copy array in JavaScript" this article.

Use the Array.unshift method and the expansion operator const numbers = [1, 2, 3, 4, 5]; let copy = []; copy.unshift (.. array); copy.push (6); / / add a new entry to prove that the original array console.log (copy); console.log (numbers) will not be modified / / output / / [1, 2, 3, 4, 5, 6] / / [1, 2, 3, 4, 5] are all the contents of the article "how to use Array.unshift methods and unfold operators to copy arrays in JavaScript". 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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