What's the use of JavaScript's concat function?

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Concat function of JavaScript

Concat (arr1, arr2,....)

Returns a new array. The array is generated by adding all arrayX parameters to the arrayObject. If the argument to concat () is an array, then the elements in the array are added, not the array.

Use an example

Var arr1 = ["1", "2", "3"]; var arr2 = arr1.concat (); arr2 [1] = "9"; console.log ("original value of the array:" + arr1); console.log ("new value of the array:" + arr2); above is all the content of the article "what is the use of the concat function of 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!