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90 lines
2.9 KiB
Markdown
90 lines
2.9 KiB
Markdown
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## Advanced Usage
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### Supporting legacy browsers (or IE11)
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`<zero-md>` is based on [Custom Elements V1 specs](https://www.w3.org/TR/custom-elements/) which
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is [natively](https://caniuse.com/custom-elementsv1) [supported](https://caniuse.com/shadowdomv1)
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in all modern browsers - since at least **three** major versions ago across all vendors. Correspondingly,
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there is therefore less need for [web component polyfills](https://github.com/webcomponents/polyfills/tree/master/packages/webcomponentsjs).
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However, while *not* recommended, if there is a strong case to support legacy browsers, you can
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do so like this:
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```html
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<head>
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<!-- Lightweight client-side loader that feature-detects and load polyfills only when necessary -->
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<script src="https://cdn.jsdelivr.net/npm/@webcomponents/webcomponentsjs@2/webcomponents-loader.min.js"></script>
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<!-- Load the legacy (transpiled) build of <zero-md> -->
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<script defer src="https://cdn.jsdelivr.net/gh/zerodevx/zero-md@2/dist/zero-md.legacy.min.js"></script>
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</head>
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```
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### Specify your own URLs for Marked or Prism
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By default, `<zero-md>` automatically loads the [Markedjs](https://cdn.jsdelivr.net/gh/markedjs/marked@1/marked.min.js)
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and [Prismjs](https://cdn.jsdelivr.net/gh/PrismJS/prism@1/prism.min.js) libraries from CDN. To use your own
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URLs, do so like this:
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```html
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<head>
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<!-- Optionally load marked from your own URL first -->
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<script defer src="/node_modules/marked/marked.min.js"></script>
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<!-- Or prismjs from your own URL -->
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<script defer src="/node_modules/prismjs/prism.js"></script>
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<!-- Then load <zero-md> -->
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<script type="module" src="/node_modules/zero-md/dist/zero-md.min.js"></script>
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</head>
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```
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### Append (or prepend) additional styles
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You can *merge* any additional style templates into an instance of `<zero-md>` like this:
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```html
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<zero-md src="example.md">
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<!-- Style template prepended before default styles -->
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<template data-merge="prepend">
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<link rel="stylesheet" href="/normalize.css">
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</template>
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<!-- Style template appended after default styles -->
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<template data-merge="append">
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<style>
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h1 {
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color: red;
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}
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</style>
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</template>
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</zero-md>
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```
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### Dedent inline markdown
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You can *opt-in* to apply a dedent function onto the inline markdown. The function *tries* to remove the
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leading whitespace that would otherwise be incorrectly interpreted as a code block by the markdown
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parser.
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```html
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<zero-md>
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<!-- Set `data-dedent` to remove indentation -->
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<script type="text/markdown" data-dedent>
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# Opt in to apply dedent function
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If **indentation** is important to you.
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</script>
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</zero-md>
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```
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### Apply marked options during render
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```html
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<!-- Set manual-render to disable auto render -->
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<zero-md id="app" src="example.md" manual-render></zero-md>
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<script>
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// Pass marked opts into render() function
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app.render({
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gfm: false,
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...
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})
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</script>
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```
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