How to run HTML code?

Hello. The page displays the HTML code, meaning that it executes the code shown in plain text.
Here's what happens:
April 4th 20 at 00:44
3 answers
April 4th 20 at 00:46
As a variant of the angle bracket is replaced by the entity. You can check in the developer console.
April 4th 20 at 00:48
Select with the mouse and "view source code of this fragment".
April 4th 20 at 00:50
And the source can be seen?

Find more questions by tags HTML