VSCode Autocomplete Not Displaying

I am currently running Visual Studio Code in WSL, and for some reason autocomplete doesn’t work. I’m not sure why autocomplete isn’t working. Any solution would be greatly appreciated. It doesn’t even work when I’m not in WSL. So i’m not sure what the issue is.
clearBtn. only shows variables within the scope of the class

I have tried checking my settings to make sure that built in typescript and javascript features are enabled, which they are. In this case, when I want innerHTML to appear for clearBtn. I have to type everything in manually.