Function walkFetchEmbed

src/core/render/embed.js:7–92

({ embedTokens, compile, fetch }, cb)

const cached = {};

function walkFetchEmbed({ embedTokens, compile, fetch }, cb) {
  let token;
  let step = 0;
  let count = 1;

  if (!embedTokens.length) {
    return cb({});
  }

  while ((token = embedTokens[step++])) {
    // eslint-disable-next-line no-shadow
    const next = (function (token) {
      return text => {
        let embedToken;
        if (text) {
          if (token.embed.type === 'markdown') {
            let path = token.embed.url.split('/');
            path.pop();
            path = path.join('/');
            // Resolves relative links to absolute
            text = text.replace(/\[([^[\]]+)\]\(([^)]+)\)/g, x => {
              const linkBeginIndex = x.indexOf('(');
              if (x.slice(linkBeginIndex, linkBeginIndex + 2) === '(.') {
                return (
                  x.substring(0, linkBeginIndex) +
                  `(${window.location.protocol}//${window.location.host}${path}/` +
                  x.substring(linkBeginIndex + 1, x.length - 1) +
                  ')'
                );
              }
              return x;
            });

            // This may contain YAML front matter and will need to be stripped.
            const frontMatterInstalled =
              ($docsify.frontMatter || {}).installed || false;
            if (frontMatterInstalled === true) {
              text = $docsify.frontMatter.parseMarkdown(text);
            }

            embedToken = compile.lexer(text);
          } else if (token.embed.type === 'code') {
            if (token.embed.fragment) {
              const fragment = token.embed.fragment;
              const pattern = new RegExp(
                `(?:###|\\/\\/\\/)\\s*\\[${fragment}\\]([\\s\\S]*)(?:###|\\/\\/\\/)\\s*\\[${fragment}\\]`
              );
              text = stripIndent((text.match(pattern) || [])[1] || '').trim();
            }

            embedToken = compile.lexer(
              '```' +
                token.embed.lang +
                '\n' +
                text.replace(/`/g, '@DOCSIFY_QM@') +
                '\n```\n'
            );
          } else if (token.embed.type === 'mermaid') {