How do I merge arrays in JavaScript?

To merge arrays in JavaScript, you can use the array.concat(), array.push() methods, and the spread operator ("..."). The concat() method is used to concatenate two or more arrays into one The concat() method does not change existing arrays but returns a new array that has the result of the merge. The push() method allows you to add one or more elements to the end of an array; the method changes the original array. You can also use the spread ("...") operator to merge arrays by writing two or more variables inside the array, and JavaScript will merge them into one new array. In this JavaScript arrays merge example, we use the array.concat() method. Below you can see more examples of JavaScript array merging with a detailed description of each method. Click Execute to run the JavaScript Merge Array Example online and see the result.
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