Allow use of comment instead of tag

[trevorhreed]

Sometimes using a tag to trigger the benefits of this plugin on a template string isn't feasible, and it would be nice to be able to substitute a comment instead. For example, instead of doing this:

var template = html`
  <h1>Hello World!</h1>
`

...it would be nice to be able to do this:

var template = /*html*/`
  <h1>Hello World</h1>
`

[aubricus]

For VS Code this exact syntax is available and doesn't require any additional imports: https://marketplace.visualstudio.com/items?itemName=Tobermory.es6-string-html

This may also be applicable to #4 as well.

[felipecrs]

This would solve mjbvz/vscode-lit-html#14. Any tips for the implementation? It would be good if we could expose the regex as a configuration.

[chase-moskal]

but i want to understand why a comment be desirable over of using a dummy-noop html tag function?

using a noop has the advantages of (a) already working, and (b) making for a good point of refactorability, ie, validation or santization

what motivates you to prefer a comment for this purpose?

[rdmurphy]

Just wanted to throw a +1 on this — I've been using that es6-string-html plugin and it works fine visually, but it doesn't implement the wonderful IntelliSense support and other things that this plugin has. Sometimes I'm just throwing some stringified HTML into a <template> via JS and would love to have this stuff come along with it!