Why this after pesudo element doesn't appear

Question

https://code.sololearn.com/WzA9mEVBG3Ro/?ref=app

Answer 1

Try this :

h1
{
position: relative;
}
h1::after
{
content: "";
border: 3em solid transparent;
border-color: transparent #777 transparent transparent;
position: absolute;
}

Hope this is the effect that you needed..

Your Mistakes :

you were selecting h which isnt any valid html tag .. i believe you ment h1 !
and closing brace } was missing

Answer 2

Prashanth Kumar thanks it's work now