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This article mainly introduces the shorthand method of JavaScript extension operator, which is very detailed and has certain reference value. Friends who are interested must finish it!

Extension operator abbreviation

The extension operator has several use cases that make JavaScript code more efficient and can be used instead of an array function.

Abbreviation:

Unlike the concat () function, you can use the extension operator to insert an array anywhere in an array.

You can also use extension operators to deconstruct:

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