Using JavaScript to Implement Conditional Statements for Adjusting CSS Height

Check out my code snippet below:

<!doctype html>

<html lang="en">
<head>
    <meta charset="utf-8">
    <script src="js/jquery-1.7.2.min.js"></script>
<style>
div {
    border: 2px solid black;
    width: 200px;
    min-height: 300px;
}
</style>
</head>
<body>
<div>
    <p id="demo">This will change</p>
    <input type="button" value="OK" onclick="myFunction()"/>
</div>
<script>
$(document).ready(function()
{
    $("input").click(function()
    {
        if($("div").height() === 300){
            document.getElementById("demo").innerHTML = "HELLO WORLD!";
        }
    });
});
</script>
</body>
</html>

I am trying to achieve the functionality where clicking a button will change the text in the paragraph within a div element, based on its height. This is my first attempt at using JavaScript for this purpose. Any help or suggestions are appreciated.

Answer №2

Upon initial observation, a couple of things stand out. Firstly, the .height function returns the numerical value without "px". Secondly, you are passing a value into the .height function, essentially setting its value to "300px". Lastly, the usage of the === operator only results in true if both type and value match exactly. A suggestion would be to try the following:

if($("div").height() == 300)

Additionally, it's advisable to assign IDs to your input and div elements for future reference, particularly in situations where there may be multiple instances of each element in your markup.

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