An extension for showdown that enables custom classes from your markdown.
npm install showdown-custom-class
const customClassExt = require('showdown-custom-class')
...
var converter = new showdown.Converter({
extensions: [customClassExt],
})#[.header]Header
[.pTag line]Just a line of text.<h1 id="headercontenttitle" class="header">Header</h1>
<p class="pTag line">Just a line of text.</p>