mirror of
https://github.com/JonnyBro/JaBa.git
synced 2024-11-23 13:44:59 +05:00
434 lines
12 KiB
Markdown
434 lines
12 KiB
Markdown
|
|
||
|
|
|
||
|
|
|
||
|
|
# <zero-md>
|
||
|
|
|
||
|
|
> Ridiculously simple zero-config markdown displayer
|
||
|
|
|
||
|
|
A native markdown-to-html web component based on [Custom Elements V1 specs](https://www.w3.org/TR/custom-elements/)
|
||
|
|
to load and display an external MD file. Under the hood, it uses [Marked](https://github.com/markedjs/marked) for
|
||
|
|
super-fast markdown transformation, and [Prism](https://github.com/PrismJS/prism) for feature-packed syntax
|
||
|
|
highlighting - automagically rendering into its own self-contained shadow DOM container, while encapsulating
|
||
|
|
implementation details into one embarassingly easy-to-use package.
|
||
|
|
|
||
|
|
**NOTE: This is the V2 branch. If you're looking for the older version, see the [V1 branch](https://github.com/zerodevx/zero-md/tree/v1).**
|
||
|
|
|
||
|
|
Featuring:
|
||
|
|
|
||
|
|
- [x] Automated hash-link scrolls
|
||
|
|
- [x] Built-in FOUC prevention
|
||
|
|
- [x] Automatically rewrite URLs relative to `src`
|
||
|
|
- [x] Automatically re-render when `src` changes
|
||
|
|
- [x] Automatically re-render when inline markdown or style template changes
|
||
|
|
- [x] Support for >200 code languages with detection for unhinted code blocks
|
||
|
|
- [x] Easy styling mechanism
|
||
|
|
- [x] Highly extensible
|
||
|
|
|
||
|
|
Documentation: https://zerodevx.github.io/zero-md/
|
||
|
|
|
||
|
|
**NOTE: Your markdown file(s) needs to be hosted! Browsers don't generally allow javascript to access files on
|
||
|
|
the local hard drive because of security concerns. Standard
|
||
|
|
[CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) rules apply.**
|
||
|
|
|
||
|
|
## Installation
|
||
|
|
|
||
|
|
### Load via CDN (recommended)
|
||
|
|
|
||
|
|
`zero-md` is designed to be zero-config with good defaults. For most use-cases, just importing the script from CDN
|
||
|
|
and consuming the component directly should suffice.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<head>
|
||
|
|
...
|
||
|
|
<!-- Import element definition -->
|
||
|
|
<script type="module" src="https://cdn.jsdelivr.net/gh/zerodevx/zero-md@2/dist/zero-md.min.js"></script>
|
||
|
|
...
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
...
|
||
|
|
<!-- Profit! -->
|
||
|
|
<zero-md src="/example.md"></zero-md>
|
||
|
|
...
|
||
|
|
</body>
|
||
|
|
```
|
||
|
|
|
||
|
|
Latest stable: `https://cdn.jsdelivr.net/gh/zerodevx/zero-md@2/dist/zero-md.min.js`
|
||
|
|
|
||
|
|
Latest beta: `https://cdn.jsdelivr.net/npm/zero-md@next/dist/zero-md.min.js`
|
||
|
|
|
||
|
|
### Install in web projects
|
||
|
|
|
||
|
|
Install package with `npm` or `yarn`. Note that you'll need [Node.js](https://nodejs.org/) installed.
|
||
|
|
|
||
|
|
```
|
||
|
|
$ npm install --save zero-md
|
||
|
|
```
|
||
|
|
|
||
|
|
Import the class, register the element, and use anywhere.
|
||
|
|
|
||
|
|
```js
|
||
|
|
// Import the element definition
|
||
|
|
import ZeroMd from 'zero-md'
|
||
|
|
|
||
|
|
// Register the custom element
|
||
|
|
customElements.define('zero-md', ZeroMd)
|
||
|
|
|
||
|
|
// Render anywhere
|
||
|
|
app.render(`<zero-md src=${src}></zero-md>`, target)
|
||
|
|
```
|
||
|
|
|
||
|
|
Or load the distribution directly in HTML.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<script type="module" src="/node_modules/zero-md/dist/zero-md.min.js"></script>
|
||
|
|
...
|
||
|
|
<zero-md src="example.md"></zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
## Basic Usage
|
||
|
|
|
||
|
|
### Display an external markdown file
|
||
|
|
|
||
|
|
```html
|
||
|
|
<!-- Simply set the `src` attribute and win -->
|
||
|
|
<zero-md src="https://example.com/markdown.md"></zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
At its most basic, `<zero-md>` loads and displays an external MD file with **default stylesheets** - a Github-themed
|
||
|
|
stylesheet paired with a light-themed one for code blocks, just like what you see in these docs. So internally,
|
||
|
|
the above code block is semantically equivalent to the one below:
|
||
|
|
|
||
|
|
```html
|
||
|
|
<zero-md src="https://example.com/markdown.md">
|
||
|
|
<!-- By default, this style template gets loaded -->
|
||
|
|
<template>
|
||
|
|
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/sindresorhus/github-markdown-css@4/github-markdown.min.css">
|
||
|
|
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/PrismJS/prism@1/themes/prism.min.css">
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
### Using your own styles
|
||
|
|
|
||
|
|
To override the default theme, supply your own style template.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<zero-md src="https://example.com/markdown.md">
|
||
|
|
<!-- Wrap with a <template> tag -->
|
||
|
|
<template>
|
||
|
|
<!-- Define your own styles inside a `<style>` tag -->
|
||
|
|
<style>
|
||
|
|
h1 {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
...
|
||
|
|
</style>
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
### Or your own stylesheets
|
||
|
|
|
||
|
|
```html
|
||
|
|
<zero-md src="https://example.com/markdown.md">
|
||
|
|
<!-- Wrap with a <template> tag -->
|
||
|
|
<template>
|
||
|
|
<!-- Load external stylesheets with a `<link rel="stylesheet">` tag -->
|
||
|
|
<link rel="stylesheet" href="markdown-styles.css">
|
||
|
|
<link rel="stylesheet" href="highlight-styles.css">
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
### Or both
|
||
|
|
|
||
|
|
```html
|
||
|
|
<zero-md src="https://example.com/markdown.md">
|
||
|
|
<template>
|
||
|
|
<!-- The CSS load order is respected -->
|
||
|
|
<link rel="stylesheet" href="markdown-styles.css">
|
||
|
|
<style>
|
||
|
|
h1 {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
<link rel="stylesheet" href="highlight-styles.css">
|
||
|
|
<style>
|
||
|
|
code {
|
||
|
|
background: yellow;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
### Write markdown inline
|
||
|
|
|
||
|
|
You can pass in your markdown inline too.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<!-- Do not set the `src` attribute -->
|
||
|
|
<zero-md>
|
||
|
|
<!-- Write your markdown inside a `<script type="text/markdown">` tag -->
|
||
|
|
<script type="text/markdown">
|
||
|
|
# **This** is my [markdown](https://example.com)
|
||
|
|
</script>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
By default, `<zero-md>` first tries to render `src`. If `src` is falsy (undefined, file not found, empty file etc),
|
||
|
|
it **falls-back** to the contents inside the `<script type="text/markdown">` tag.
|
||
|
|
|
||
|
|
### Put it all together
|
||
|
|
|
||
|
|
```html
|
||
|
|
<zero-md src="https://example.com/markdown.md">
|
||
|
|
<template>
|
||
|
|
<link rel="stylesheet" href="markdown-styles.css">
|
||
|
|
<style>
|
||
|
|
h1 {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
<link rel="stylesheet" href="highlight-styles.css">
|
||
|
|
<style>
|
||
|
|
code {
|
||
|
|
background: yellow;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</template>
|
||
|
|
<script type="text/markdown">
|
||
|
|
This is the fall-back markdown that will **only show** when `src` is falsy.
|
||
|
|
</script>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
## API
|
||
|
|
|
||
|
|
Advanced usage: https://zerodevx.github.io/zero-md/advanced-usage/
|
||
|
|
|
||
|
|
Attributes and helpers: https://zerodevx.github.io/zero-md/attributes-and-helpers/
|
||
|
|
|
||
|
|
Configuration: https://zerodevx.github.io/zero-md/configuration/
|
||
|
|
|
||
|
|
## Migrating from V1 to V2
|
||
|
|
|
||
|
|
1. Support for `<xmp>` tag is removed; use `<script type="text/markdown">` instead.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<!-- Previous -->
|
||
|
|
<zero-md>
|
||
|
|
<template>
|
||
|
|
<xmp>
|
||
|
|
# `This` is my [markdown](example.md)
|
||
|
|
</xmp>
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
|
||
|
|
<!-- Now -->
|
||
|
|
<zero-md>
|
||
|
|
<!-- No need to wrap with <template> tag -->
|
||
|
|
<script type="text/markdown">
|
||
|
|
# `This` is my [markdown](example.md)
|
||
|
|
</script>
|
||
|
|
</zero-md>
|
||
|
|
|
||
|
|
<!-- If you need your code to be pretty, -->
|
||
|
|
<zero-md>
|
||
|
|
<!-- Set `data-dedent` to opt-in to dedent the text during render -->
|
||
|
|
<script type="text/markdown" data-dedent>
|
||
|
|
# It is important to be pretty
|
||
|
|
So having spacing makes me happy.
|
||
|
|
</script>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
2. Markdown source behaviour has changed. Think of `<script type="text/markdown">` as a "fallback".
|
||
|
|
|
||
|
|
```html
|
||
|
|
<!-- Previous -->
|
||
|
|
<zero-md src="will-not-render.md">
|
||
|
|
<template>
|
||
|
|
<xmp>
|
||
|
|
# This has first priority and will be rendered instead of `will-not-render.md`
|
||
|
|
</xmp>
|
||
|
|
</template>
|
||
|
|
<zero-md>
|
||
|
|
|
||
|
|
<!-- Now -->
|
||
|
|
<zero-md src="will-render-unless-falsy.md">
|
||
|
|
<script type="text/markdown">
|
||
|
|
# This will NOT be rendered *unless* `src` resolves to falsy
|
||
|
|
</script>
|
||
|
|
<zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
3. The `css-urls` attribute is deprecated. Use `<link rel="stylesheet">` instead.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<!-- Previous -->
|
||
|
|
<zero-md src="example.md" css-urls='["/style1.css", "/style2.css"]'><zero-md>
|
||
|
|
|
||
|
|
<!-- Now, this... -->
|
||
|
|
<zero-md src="example.md"></zero-md>
|
||
|
|
|
||
|
|
<!-- ...is actually equivalent to this -->
|
||
|
|
<zero-md src="example.md">
|
||
|
|
<template>
|
||
|
|
<!-- These are the default stylesheets -->
|
||
|
|
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/sindresorhus/github-markdown-css@4/github-markdown.min.css">
|
||
|
|
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/PrismJS/prism@1/themes/prism.min.css">
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
|
||
|
|
<!-- So, to apply your own external stylesheets... -->
|
||
|
|
<zero-md src="example.md">
|
||
|
|
<!-- ...you overwrite the default template -->
|
||
|
|
<template>
|
||
|
|
<!-- Use <link> tags to reference your own stylesheets -->
|
||
|
|
<link rel="stylesheet" href="/style1.css">
|
||
|
|
<link rel="stylesheet" href="/style2.css">
|
||
|
|
<!-- You can even apply additional styles -->
|
||
|
|
<style>
|
||
|
|
p {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
|
||
|
|
<!-- If you like the default stylesheets but wish to apply some overrides -->
|
||
|
|
<zero-md src="example.md">
|
||
|
|
<!-- Set `data-merge` to "append" to apply this template AFTER the default template -->
|
||
|
|
<!-- Or "prepend" to apply this template BEFORE -->
|
||
|
|
<template data-merge="append">
|
||
|
|
<style>
|
||
|
|
p {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</template>
|
||
|
|
</zero-md>
|
||
|
|
```
|
||
|
|
|
||
|
|
4. The attributes `marked-url` and `prism-url` are deprecated. To load `marked` or `prism` from another
|
||
|
|
location, simply load their scripts *before* importing `zero-md`.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<head>
|
||
|
|
...
|
||
|
|
<script defer src="/lib/marked.js"></script>
|
||
|
|
<script defer src="/lib/prism.js"></script>
|
||
|
|
<script type="module" src="/lib/zero-md.min.js"></script>
|
||
|
|
</head>
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
5. The global config object has been renamed from `ZeroMd.config` to `ZeroMdConfig`.
|
||
|
|
|
||
|
|
```html
|
||
|
|
<!-- Previous -->
|
||
|
|
<script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>
|
||
|
|
<script>
|
||
|
|
window.ZeroMd = {
|
||
|
|
config: {
|
||
|
|
cssUrls: [
|
||
|
|
'/styles/my-markdown-theme.css',
|
||
|
|
'/styles/my-highlight-theme.css'
|
||
|
|
]
|
||
|
|
}
|
||
|
|
};
|
||
|
|
</script>
|
||
|
|
<script type="module" src="https://cdn.jsdelivr.net/gh/zerodevx/zero-md@1/src/zero-md.min.js"></script>
|
||
|
|
|
||
|
|
<!-- Now -->
|
||
|
|
<script>
|
||
|
|
window.ZeroMdConfig = {
|
||
|
|
cssUrls: [
|
||
|
|
'/styles/my-markdown-theme.css',
|
||
|
|
'/styles/my-highlight-theme.css'
|
||
|
|
]
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
<script type="module" src="https://cdn.jsdelivr.net/gh/zerodevx/zero-md@2/dist/zero-md.min.js"></script>
|
||
|
|
```
|
||
|
|
|
||
|
|
6. The convenience events `zero-md-marked-ready` and `zero-md-prism-ready` are removed and **will no longer fire**.
|
||
|
|
Instead, the `zero-md-ready` event guarantees that everything is ready, and that render can begin.
|
||
|
|
|
||
|
|
## Contributing
|
||
|
|
|
||
|
|
### Noticed a bug? Have a feature request?
|
||
|
|
|
||
|
|
Open a new [issue](https://github.com/zerodevx/zero-md/issues) in the Github repo, or raise a
|
||
|
|
[PR](https://github.com/zerodevx/zero-md/pulls)! I'd be stoked to accept any contributions!
|
||
|
|
|
||
|
|
### Develop locally
|
||
|
|
|
||
|
|
#### Install
|
||
|
|
|
||
|
|
Fork and clone the project, then install dependencies.
|
||
|
|
|
||
|
|
```bash
|
||
|
|
$ cd zero-md
|
||
|
|
$ npm install
|
||
|
|
```
|
||
|
|
|
||
|
|
#### Run the dev server
|
||
|
|
|
||
|
|
```bash
|
||
|
|
$ npm run dev
|
||
|
|
```
|
||
|
|
|
||
|
|
Open your browser to `http://localhost:5000`. You should see the test suite running.
|
||
|
|
|
||
|
|
#### Testing
|
||
|
|
|
||
|
|
Tests are browser-based and run on [Mocha](https://mochajs.org/) with [Chai](https://www.chaijs.com/)
|
||
|
|
asserts. If you're adding a new feature or bugfixing, please add the corresponding regression test
|
||
|
|
into `test/index.spec.js` accordingly.
|
||
|
|
|
||
|
|
Tests can be run by pointing your browser to `http://localhost:5000`.
|
||
|
|
|
||
|
|
#### Linting
|
||
|
|
|
||
|
|
Code should be in [Standardjs](https://standardjs.com/) format. Run the linter with:
|
||
|
|
|
||
|
|
```bash
|
||
|
|
$ npm run lint
|
||
|
|
```
|
||
|
|
|
||
|
|
#### Making changes to source
|
||
|
|
|
||
|
|
If you're adding a new feature or bugfixing, please commit your changes into a new branch and raise
|
||
|
|
a pull-request into the `main` branch upstream, and reference the related issues.
|
||
|
|
|
||
|
|
#### Running the docs
|
||
|
|
|
||
|
|
The docs (as seen in `https://zerodevx.github.io/zero-md/`) can be accessed by pointing your browser
|
||
|
|
to `http://localhost:5000/docs/` (note the trailing slash).
|
||
|
|
|
||
|
|
#### Making changes to docs
|
||
|
|
|
||
|
|
Documentation is stored in the `/docs` folder, published with [Github Pages](https://pages.github.com/)
|
||
|
|
and based on [`zero-md-docs`](https://github.com/zerodevx/zero-md-docs). The markdown for each
|
||
|
|
section is located in `readme.md` in its corresponding pretty URL.
|
||
|
|
|
||
|
|
In general, just raising a PR on `readme.md` files should suffice.
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
ISC
|
||
|
|
|
||
|
|
## Acknowledgements
|
||
|
|
|
||
|
|
Big thank you to contributors
|
||
|
|
[@EmilePerron](https://github.com/EmilePerron),
|
||
|
|
[@bennypowers](https://github.com/bennypowers),
|
||
|
|
[@TheUnlocked](https://github.com/TheUnlocked),
|
||
|
|
[@ernsheong](https://github.com/ernsheong)
|
||
|
|
for your code commits. :thumbsup:
|
||
|
|
|
||
|
|
## Version History
|
||
|
|
|
||
|
|
Check out the [releases](https://github.com/zerodevx/zero-md/releases) page.
|