What is a JavaScript array concat?

JavaScript Array concat () Method 1 Definition and Usage. The concat () method is used to join two or more arrays. … 2 Browser Support. The numbers in the table specify the first browser version that fully supports the method. 3 Syntax 4 Parameter Values 5 Technical Details 6 More Examples
For More Information Please Refer:
https://www.w3schools.com/jsref/jsref_concat_array.asp
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