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JavaScript

Posted by Reza Sorasti
Reza Sorasti
491 Points

Why the text does not show up in the browser

Hello, I have the below code:

code

<!DOCTYPE html>
<html>
<head>

</head>
<body>

    <h1 id="hello">Hommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmme</h1>
    <p>This is the home page.</p>

    <script>
        document.getElementById('hello').innerHTML = 'Hello';
    </script>

</body>
</html>

I was expecting that when the page loads to see the text 'Hommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmme' first, than seeing the text 'Hello' being replaced by it. Why is it that when I load the page, I see the text 'Hello', but I don't see the text 'Hommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmme' prior to it which gets replaced by the text 'Hello'? Doesn't html elements get loaded first and get displayed first, and then Javascript runs and manipulates the elements that already are being displayed by the html code?

1 Answer

stjarnan
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
stjarnan
Front End Web Development Techdegree Graduate 56,488 Points
stjarnan
.a{fill-rule:evenodd;}techdegree seal-36
stjarnan
Front End Web Development Techdegree Graduate 56,488 Points

Hi Reza,

You're correct, the html loads first and then when it reaches the script tag your JavaScript runs. The thing is that this happens really fast, which is why you can't see your first text.

I hope this helps :)

Jonas