Function transform

packages/compiler/lib/plugins/code.ts:25–74

(id: string, payload: string, { persistentCache })

      config = _config;
    },
    transform(id: string, payload: string, { persistentCache }) {
      if (lang) {
        if (lang.startsWith("mermaid")) {
          if (config.renderMermaid) {
            mermaidGraphs.push({ code, lang });
            payload = "<GRAPH></GRAPH>";
          }
        } else if (lang.startsWith("katex")) {
          if (config.renderKatex)
            payload = katexRenderer(code, {
              type: lang,
              inlineRender: id === "codespan",
              config,
              persistentCache,
            });
        } else {
          let keyValue: string | string[] = [];
          let options: Record<string, string> = { lang };
          if (lang.includes(" ")) {
            [lang, ...keyValue] = lang.split(" ");
            options = { ...JSON.parse(keyValue.join(" ")) };
          }
          try {
            if (options.include) {
              payload = renderTwoSlash({
                persistentCache,
                code,
                highlighter,
                lang,
                options,
                entryId: options.include,
              });
            } else if (options.name) {
              addMainIncludeTwoSlash(code, options.name);
              payload = "";
            } else {
              payload = renderShiki({
                persistentCache,
                highlighter,
                code,
                lang,
                options,
              });
            }
          } catch {}
        }
        code = lang = "";
        return payload;
      }
    },
    tapArgs(id: string, args: any[]) {
      if (id === "code") {
        code = args[0];