[html] don't let '/' trigger a suggest in embedded JavaScript

[jplackey]

Issue Type: Bug

Create and save a new .html file. Add a script tag, such as:

<script>
    function main() {
        /**/
    }
</script>

You will notice that after typing the closing slash, IntelliSense pops up (leading to potential unintended insertions if Enter is pressed, for example). If the identical JavaScript code is put into a .js file, the behavior does not occur.

VS Code version: Code 1.45.1 (5763d90, 2020-05-14T08:27:35.169Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 x 2808)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off protected_video_decode: enabled rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled viz_display_compositor: enabled_on viz_hit_test_surface_layer: disabled_off_ok webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.86GB (8.52GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (2)

Extension	Author (truncated)	Version
vscode-eslint	dba	2.1.5
python	ms-	2020.5.78807

[aeschli]

Trigger characters are defined by completion providers and there's one one suggest provider for the whole HTML.
We would have to split them up in 3.

[jplackey]

After playing with this a bit more, I do see what you mean in regards to the shared suggestion provider, as I was able to find a few other instances of it being triggered in specific cases.

/**/                <!-- does not trigger suggest -->
<script>
    function main() {
        <           // triggers suggest
        /**/        // triggers suggest
        a = b /     // triggers suggest (with fewer suggestions)
	a = b *     // does not trigger suggest
    }
</script>

That said, since there are cases where "/" doesn't trigger a suggestion (including /**/ outside of the script block), I wonder if this could somehow be addressed without splitting up the suggestion provider.