Feature request: simple code completion


I can't find how can I enable this in WebStorm. This is simple code completion in the current file.
We just parse all words in the current file and suggests them.
I think this is cool feature and can be quickly developed (not four years and still open, like this: https://youtrack.jetbrains.com/issue/WEB-18816)
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Did you try 'hippie completion' (cyclic expand word) - it's
Alt+Slashin default keymap? See https://www.jetbrains.com/help/webstorm/2020.1/auto-completing-code.html#hippie_completionI tried. But I don't understand, why I should tap alt+slash multiple times instead of nice and neat popup window.
I don't understand what is a problem to add support like this.
It can be an option and not enabled by default.
Any updates?