markdown-it-directive-webcomponents
v1.2.0
Published
Convert a markdown directive to a web component.
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markdown-it-directive-webcomponents
This plugin can convert a markdown directive (Generic directives/plugins syntax spec) to a web component (WebComponents). It needs markdown-it-directive and markdown-it as dependencies.
Install
npm i markdown-it-directive-webcomponents
API
const md = require('markdown-it')()
.use(require('markdown-it-directive-webcomponents'), {
components: [
{
present: 'both',
name: 'directive-name',
tag: 'tag-name',
allowedAttrs: [ 'inline', 'src', 'title', /^prefix/ ],
destLinkName: 'my-link-name',
destStringName: 'my-string-name',
parseInner: true
},
]
});
components
: Write conversion rules in this arraypresent
: Which type of directive to parse. Values:inline
,block
,both
.name
: The name of the directivetag
: The tag name of the converted componentallowedAttrs
: Allowed attribute names. If set as an array, elements in the array can be a String or a RegEx. If not set, allow any name. (has security issues, not recommended)destLinkName
: Attribute name when converting link-type data in link destinations (ie. the content in()
) to attributes.src
by defaultdestStringName
: Attribute name when converting string-type data in link destinations to attributes.title
by defaultparseInner
: Whether to continue to parse the content as Markdown or not. Bool type. if it isfalse
, the content will be unescaped and written in the output (html< >
etc. will still be escaped).
DOMPurify is recommended as a security backup.
Here are three directive formats that can be recognized:
text before :directive-name[content](/link "destination" /another "one"){.class #id name=value name="string!"} text after
:: directive-name [inline content] (/link "destination" /another "one") {.class #id name=value name="string!"} content title ::
::: directive-name [inline content] (/link "destination" /another "one") {.class #id name=value name="string!"} content title ::
content
:::
Will be converted to:
<p>text before <tag-name class="class" id="id" name="value" src="/link" title="destination" inline="">content</tag-name> text after</p>
<tag-name class="class" id="id" name="value" src="/link" title="destination">inline content</tag-name>
<tag-name class="class" id="id" name="value" src="/link" title="destination">
<p>content</p>
</tag-name>
In the conversion process, link-type value which in ()
will add to src
attribute, and string-type value will add to title
attribute. class
's values will be merged together and other attributes will pick the first value.
Block-level directive, if it is the third case, it will ignore the inline content and content title, and parse the content as block; if the second case, if there is, then use inline content otherwise use content title as content and parse the content as inline.
Example
const md = require('markdown-it')()
.use(require('markdown-it-directive-webcomponents'), {
components: [
{
present: 'both',
name: 'directive-name',
tag: 'tag-name',
allowedAttrs: [ 'inline', 'src', 'title', /^prefix/ ],
parseInner: true
},
{
present: 'both',
name: 'another-directive',
tag: 'another-tag',
allowedAttrs: [ 'inline', 'src', 'title', /^prefix/ ],
parseInner: false
},
]
});
console.dir(md.render(`
text before :directive-name[content](/link "destination" /another "one"){.class #id name=value name="string!"} text after
:: directive-name [inline content] (/link "destination" /another "one") {.class #id name=value name="string!"} content title ::
::: directive-name [inline content] (/link "destination" /another "one") {.class #id name=value name="string!"} content title ::
content
:::
::: another-directive
content
\\:::
:::`));
/* output
<p>text before <tag-name class="class" id="id" name="value" src="/link" title="destination" inline="">content</tag-name> text after</p>
<tag-name class="class" id="id" name="value" src="/link" title="destination">inline content</tag-name>
<tag-name class="class" id="id" name="value" src="/link" title="destination">
<p>content</p>
</tag-name>
<another-tag>
content
:::
</another-tag>
*/
More examples can be found in test.js
.
License
Copyright (c) 2020, lookas