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https://github.com/jonsmithers/vim-html-template-literals

Syntax highlighting for html template literals in javascript (as in lit-html and polymer 3)
https://github.com/jonsmithers/vim-html-template-literals

javascript js lit-element lit-html litelement polymer-3 syntax-highlighting tagged-template-literals template-literals vim

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Syntax highlighting for html template literals in javascript (as in lit-html and polymer 3)

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# HTML Template Literals

Syntax highlighting and indentation for html inside of tagged template
literals, as seen in [lit-html] and [Polymer 3].

[lit-html]: https://lit-html.polymer-project.org
[Polymer 3]: https://polymer-library.polymer-project.org/3.0/docs/about_30

## Supported Syntaxes inside ``html`...` ``
- HTML (including CSS embedded in `` tags)
- JavaScript string interpolation (`${...}`)
- nested templates (``` html`${html`${}`}` ```)

See [Configuration](#configuration) for support for css tagged literals (``css`...` ``).

## Installation

This plugin requires [vim-javascript] (or [typescript-vim] if you're using
typescript). If you use [vim-plug] for package management, installation looks
like this:

[vim-javascript]: https://github.com/pangloss/vim-javascript
[typescript-vim]: https://github.com/leafgarland/typescript-vim
[vim-plug]: https://github.com/junegunn/vim-plug

```vim
Plug 'jonsmithers/vim-html-template-literals'
Plug 'pangloss/vim-javascript'
```

_NOTE_: it's generally a good idea to have `let g:html_indent_style1 = "inc"`
in your vimrc for reasonable indentation of `<style>` tags. See `:help
html-indenting`.

## Configuration

| Flag | Description |
| -------------------- | -------------------------------------------------------------------------------------------------------------------------- |
| `g:htl_css_templates` | Enable css syntax inside css-tagged template literals (`` css`...` ``). Indentation behavior is currently not implemented. |
| `g:htl_all_templates` | (Experimental) Enable html syntax inside _all_ template literals (`` `...` ``). |

## Known Issues

- Indentation in general still has some kinks. If you see an issue, please
report it.
- This plugin conflicts a bit with vim-jsx. Having both installed
simultaneously may result in undesired indentation behaviors.
- A patch in vim 8.1 introduced native typescript support in Vim. However, its
region definitions are less precise and it's not easy to translate
vim-html-template-literals indentation behavior to work with Vim's native
typescript region definitions.

## Tips

- You can configure the [vim-closetag] plugin to work inside html template
literals:

```vim
let g:closetag_filetypes = 'html,xhtml,phtml,javascript,typescript'
let g:closetag_regions = {
\ 'typescript.tsx': 'jsxRegion,tsxRegion,litHtmlRegion',
\ 'javascript.jsx': 'jsxRegion,litHtmlRegion',
\ 'javascript': 'litHtmlRegion',
\ 'typescript': 'litHtmlRegion',
\ }
```

[vim-closetag]: https://github.com/alvan/vim-closetag