How to remove item from array by value? [duplicate]

You can use the indexOf method like this:

var index = array.indexOf(item);
if (index !== -1) {
  array.splice(index, 1);
}

Note: You’ll need to shim it for IE8 and below

var array = [1,2,3,4]
var item = 3

var index = array.indexOf(item);
array.splice(index, 1);

console.log(array)