Emmet expand abbreviation doesn't work in Visual Studio Code with the attributes

After few days, investigating in the Emmet in Visual Studio Code webpage I found the solution.

You need to add next line to the User Settings file for expanding the Emmet abbreviations with Tab key:

"emmet.triggerExpansionOnTab": true

This is because by default is disabled on Visual Studio Code.

In Visual Studio Code: File > Preferences > Settings > Extensions > Emmet > Edit in settings.json file

Add the below code which worked for me.

"emmet.triggerExpansionOnTab": true,
"files.associations": {"*html":"html"},

I hope it helps someone.