how to pass a string into a nested function in jquery

Question

I am trying to figure out why I cant pass a string into a function that contains another function. I get undefined when I alert.

$.fn.downCount = function (current_time) {
    function countdown(current_time) {
        alert(current_time)
    }
})

var current_time = "01:00";
downCount(current_time);

But that code doesn't alert anything. Anyways, remove current_time as an argument of countdown if you want to use the current_time from downCount. — Andrew Li
– Andrew Li, Commented Sep 1, 2017 at 20:19

Matthew Johnson · Accepted Answer · 2017-09-01 20:29:28Z

1

You never actually call the inner function. Call the function and pass in the current_time.

$.fn.downCount = function (current_time) {
    function countdown() {
        alert(current_time)
    }
    countdown();
}


var current_time = "01:00";
$.fn.downCount(current_time);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
...

Also, as Andrew mentioned, you don't need to pass in the current_time into the countdown function. It can be simplified to:

$.fn.downCount = function (current_time) {
    function countdown() {
        alert(current_time)
    }
    countdown();
}

edited Sep 1, 2017 at 20:29

answered Sep 1, 2017 at 20:24

Matthew Johnson

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1 Comment

Robert Wade Over a year ago

Beat me to it. I'd also like to add that in OP's original code there's an unnecessary ")" after the closing curly brace on initial plugin definition. Looks like you caught that as well. Cheers.

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