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Ryan Rassoli3,365 Points
Can someone explain how if you set the min-height of a footer to 100vh, why doesn't the footer take up the space of the entire page? And what is the purpose of saying min-height: calc (100vh-89px);?
Jacob JacksonUX Design Techdegree Student 7,833 Points
So the vh units refer to setting the placement of the selected element on the page, relative to the viewport (saying 100vh means you want to set it in the vertical position of 100% of the height of the page. I know this can come across confusing because it's a "height" property, but try to think of it the way described above for this particular styling.
min-height: calc (100vh-89px);
The thing to remember when you're using this method to accomplish your goal with the footer is that any content you put into that footer will actually push the footer out of the site (think of the 100vh as meaning the top of your footer div). To combat this, you would manually have to make up for it by subtracting the height of the content you add to the div.
To avoid this altogether, I would recommend using flexbox which has a built-in way to do this automatically. Here's the lesson below
I hope this helps! Good luck!