Pass a button element into callback function?

Question

I'm trying to pass a button element to the second function upon completion of first function. I've stepped through it with the debugger tool and the ele button being passed into the callback function is being passed correctly. However, the button element being passed in runThisSecond is returning undefined. Any ideas as to why that might be?

HTML file:


<button type="button" class="btn fruitbtn" data-fruitname= "@item.FruitName">   Add Fruit </button>

JavaScript:


$("$table#Results").on('click', '.fruitbtn', function() {
  runThisSecond(runThisFirst($(this)));
})
    
function runThisFirst (ele, callback) {
        swal({ 
            html:true,
            title: "Fruits"
        },
            function(isConfirm) {
                callback(ele);    //button element is correctly passed in here
            }
        )
    }
    
    function runThisSecond(ele) {
        var button = ele;    //This is returning undefined
    }

Do you mean to be passing runThisSecond as the callback to runThisFirst? If so, I think it should be like this: runThisFirst($(this), runThisSecond) — Nick
– Nick, Commented Dec 29, 2020 at 2:11

Nick · Accepted Answer · 2020-12-29 02:15:44Z

1

The only thing you're currently passing to runThisSecond is the value returned from runThisFirst, which is nothing (undefined). If you want runThisSecond to act as the callback parameter in runThisFirst, you'll need to pass it as the second argument:

runThisFirst($(this), runThisSecond)

answered Dec 29, 2020 at 2:15

Nick

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1 Comment

Nick Over a year ago

No problem, callbacks are magical until you realize you're just passing a function to another function as an argument!

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