Troubleshooting issues with adding child elements in JavaScript

Styling with CSS:

ul #allposts li{
    height: 50px;
    width: 50px;
    background-color: yellow;
    border: 1px solid yellow;
}

Creating HTML structure:

<ul id = "allposts"></ul>

Adding JavaScript functionality:

var container = document.getElementById('allposts');
var newPost = document.createElement('li');
container.appendChild(newPost);

Despite the code being implemented, the new post does not appear as expected. It was supposed to display a small yellow rectangle, right?

Any suggestions on what might be causing this issue?

javascripthtmlcssappendchild

Answer №1

http://codepen.io/abcd1234/

#allitems{  //changed the id to allitems and adjusted the height and width
    height: 60px;
    width: 60px;
    background-color: green;
    border: 2px solid green;
}

Answer №2

The issue lies within your CSS code. The correct selector should be:

ul#allitems li

It is worth noting that IDs are meant to be unique, so specifying the tag name may not be necessary:

#allitems li

Your current selector implies:

Select all li elements that are children of elements with the ID of allitems, which are descendants of all ul elements. This might not be the intended behavior.

Answer №3

Try removing the space between ul and #allposts. That should solve the issue.

(Remember: you can actually omit ul#allposts since IDs are unique, as noted by other contributors.)

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