FCC Project 5: Height of the welcome section should be equal to the height of the viewport

I am having an issue calculating the viewport height : https://codepen.io/melanie_almeida/pen/gObEEwZ

I will kindly appreciate your help

I also have read the documentation about viewport but still don’t get what is it and how to calculate it.

PS: I have posted my help request in a similar post but got no answer, probably because the latest reply on the thread was old.

Hey @Melanie12, there is CSS value vh equal to 1% of viewport height. 100vh would be height of the viewport.

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but when I do
#welcome-section {
I don’t pass the test :confused:

if we take a look at the message just below the failed user story, it says:

The height of #welcome-section is not equal to the height of the viewport : expected 225 to be close to 223 +/- 0

so I used the developer tools to inspect the page, and voilà:

You have a 2px border…

Thank you both for your explanations. It worked

But I could have never found the solution by myself :frowning:
if you have good ressources about viewport so that I can understand next time what to do, I would be curious to learn!