blog/themes/chameleon/scripts/heading-link.js

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'use strict'
/* global hexo */
/*
* Add Link button next to a heading
* based on https://github.com/hexojs/hexo-renderer-marked/blob/master/lib/renderer.js
*/
const { slugize, stripHTML, unescapeHTML: unescape } = require('hexo-util')
const anchorId = (str, transformOption) => {
return slugize(stripHTML(unescape(str.replace('.', ''))).trim(), { transform: transformOption })
}
hexo.extend.filter.register('marked:renderer', function (renderer) {
const { config } = this
const headingId = {}
renderer.heading = function (text, level) {
const { modifyAnchors } = config.marked
const transformOption = modifyAnchors
let id = anchorId(text, transformOption)
// Add a number after id if repeated
if (headingId[id]) {
id += `-${headingId[id]++}`
} else {
headingId[id] = 1
}
// add headerlink
return `<h${level} id="${id}">${text} <a href="#${id}" class="headerlink" title="${stripHTML(text)}">§</a></h${level}>`
}
})