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Frequently Asked Questions

How does foreach () work in JavaScript?

JavaScript's forEach () function executes a function on every element in an array. However, since forEach () is a function rather than a loop, JavaScript errors out if you try to use continue:

What is the difference between map and foreach in JavaScript?

forEach () executes the callback function once for each array element; unlike map () or reduce () it always returns the value undefined and is not chainable. The typical use case is to execute side effects at the end of a chain. forEach () does not mutate the array on which it is called.

How do you use foreach in an array?

The forEach () method calls a function once for each element in an array, in order. Note: the function is not executed for array elements without values. The numbers in the table specify the first browser version that fully supports the method. Required.

How to skip to the next iteration of foreach () in JavaScript?

However, since forEach () is a function rather than a loop, JavaScript errors out if you try to use continue: We recommend using for/of loops to iterate through an array unless you have a good reason not to. However, if you find yourself stuck with a forEach () and need to skip to the next iteration, here's two workarounds. 1. Use return


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