FAQ: CSS Display and Positioning - Position: Sticky

This community-built FAQ covers the “Position: Sticky” exercise from the lesson “CSS Display and Positioning”.

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FAQs on the exercise Position: Sticky

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The sticky value is another position value that keeps an element in the document flow as the user scrolls, but sticks to a specified position as the page is scrolled further.

I understand what position: sticky do in css.
But I didn’t understand what is the usage of sticky in real-world websites. Can anyone please demonstrate it with example?
Thanks

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Right here on this blog, on the left you have that sticky page progress. That is a good example.

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This is done by using the sticky value along with the familiar offset properties, as well as one new one.

Anyone know what the new offset property is? I don’t seem to see any new offset properties in the lesson material nor in the examples.

EDIT: It’s the next lesson, the z-index (https://developer.mozilla.org/en-US/docs/Web/CSS/z-index). Maybe should add a note about this fact to this lesson: “…, as well as one new one (z-index) which we will talk about in the next part.”

I was wandering why the <h4>Question 5</h4> element didn’t “stick” at 40px from the top, like all the prevoius questions did. Same class, so they all correspond to the same style in css.

I have the exact same question.

From the lesson:

Blockquote “And since ‘fixed’ and ‘absolute’ positioned elements are removed from the document flow, when a user scrolls, these elements will stay at their specified offset position.”

I’m confused here, because in the Fixed section, it says

Blockquote “When an element’s position is set to ‘absolute’, as in the last exercise, the element will scroll with the rest of the document when a user scrolls.”

And then, it says that with ‘fixed’

Blockquote “We can fix an element to a specific position on the page (regardless of user scrolling)”

My question is - will ‘absolute’ and ‘fixed’ both stay on the page when scrolling? The first quote from the “Sticky” section makes it sound like both absolute and fixed will stay positioned regardless of scrolling. But if that’s the case, then what is the difference between the two?

Wha’s the difference between fixed and sticky?

Maybe I’m missing something, but when I set the rule position:sticky for the question class and Run the code, I get an error:

And even though I’m getting an error, the change is reflected in the in-course browser:

EDIT
Annnnd I just figured out why… position was already set a few lines up, I just didn’t see it. I might try the same in a text editor/local IDE to see if this sort of thing would be picked up in the real-world

Happened to me too :sweat_smile:

haha, glad it’s not just me!

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It’s still not working for me, even when I remove the earlier position declaration. Any suggestions? Also, why won’t sticky show up in purple like the other position keywords?