hexo-renderer-multi-markdown-it/lib/renderer/markdown-it-chart/index.js

A Markdown parser for Hexo and auto Minify HTML, CSS, JS.

function guid() {
    return 'xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
        var r = Math.random() * 16 | 0,
            v = c == 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });
}

module.exports = (md, options) => {

    const defaultRenderer = md.renderer.rules.fence.bind(md.renderer.rules)

    md.renderer.rules.fence = (tokens, idx, options, env, self) => {
        const token = tokens[idx]
        const code = token.content.trim()

        if (token.info === 'chart') {
            var r = guid();

            return `<div id="chart${r}"></div>
            <script type="text/javascript">
                var chart${r} = new frappe.Chart(document.getElementById('chart${r}'), ${code});
                window.addEventListener('pjax:send', function() {
                    chart${r}.destroy()
                });
            </script>`
        }
        
        return defaultRenderer(tokens, idx, options, env, self)
    }
}