What is the meaning of the `return` keyword in the `forEach` function?

Question

$('button').click(function(){[1,2,3,4,5].forEach(function(n){if(n==3){//It should break here and not pop up anything returnfalse}alert(n)})})&lt;scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.j

P粉245003607 · Answer

The return statement return will exit the current function, but the loop will continue, so you will get the "next" skipped if statement and pop 4 Item...

If you need to stop the loop, you should use a normal for loop like this:

$('button').click(function () {
   var arr = [1, 2, 3, 4, 5];
   for(var i = 0; i < arr.length; i++) {
     var n = arr[i]; 
     if (n == 3) {
         break;
      }
      alert(n);
   })
})

You can read more about break and continue in js here: http://www.w3schools.com/js/js_break.asp

P粉461599845 · Answer

From Mozilla Developer Network: