Bootstrap v and h isn't working


Why bootstrap width and height isn’t working in this code?

<div class="container">
    <div class="row">
        <div class="col mx-auto" >
            <div class="container w-50 h-50 bg-warning">






Hey there,

nice to meet you! :wave:

It would be awesome to see a (working) example of your project on codepen, so that we can fiddle around with it.

Looking forward to seeing it!

I don’t know too,I did not find any error in your codes,just keep searching.