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This article mainly explains "how to use JavaScript array iterative method to operate each array item", the content of the article is simple and clear, easy to learn and understand, now please follow Xiaobian's train of thought slowly in depth, together to study and learn "how to use JavaScript array iterative method to operate each array item"!

Array.forEach ()

The forEach () method calls the function (callback function) once for each array element.

Example

Var txt = ""

Var numbers = [45, 4, 9, 16, 25]

Numbers.forEach (myFunction)

Function myFunction (value, index, array) {

Txt = txt + value + "

"

}

Note: this function takes three parameters:

Project value

Project index

The array itself

The above example uses only the value parameter. This example can be rewritten as:

Example

Var txt = ""

Var numbers = [45, 4, 9, 16, 25]

Numbers.forEach (myFunction)

Function myFunction (value) {

Txt = txt + value + "

"

}

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