How to show button if textbox is not empty ?

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I want to show a button if the text box is not empty.

What I have tried:

Otherwise empty the textbox value, then hide button like toggle in jQuery. How can I do this? here is fiddle...
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Posted 23-Apr-17 0:23am

Member 12955507

Updated 23-Apr-17 2:06am

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Afzaal Ahmad Zeeshan · Accepted Answer · 2017-04-23T02:06:00

Perhaps the following function would work,

JavaScript

$("#txtBoxClientId").change(function () { // Your keyup function was also correct
    if($(this).val() == "") {
        // If text is empty, 
        $("#btnId").hide();
    } else {
        // Text found
        $("#btnId").show();
    }
});

This would also let you make a condition to only show button when there are a few characters in the textbox.

The problem at that location can be answered in different ways,

1. The jQuery may not be loaded. If you open the External libraries tab, you will see you did not include anything.
2. JSFiddle writes all of the content in a nested HTML document, thus you cannot easily map the functions in there. Write a sample HTML document in your notepad, and then write the code as well. Run that file in any browser to get a good demo.