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