hexo-theme-redefine/scripts/filters/link-handle.js

Redefine your writing with Hexo Theme Redefine.

/* main hexo */

"use strict";

hexo.extend.filter.register(
  "after_post_render",
  function (data) {
    const theme = this.theme;
    const config = this.config;
    const url = new URL(config.url);
    const siteHost = url.hostname || config.url;

    // Match 'a' tags that don't contain html children.
    const regPureATag = /<a([^>]*)href="([^"]*)"([^>]*)>([^<]*)<\/a>/gim;

    data.content = data.content.replace(
      regPureATag,
      function (match, attrBegin, href, attrEnd, html) {
        // Exit if the href attribute doesn't exists.
        if (!href) return match;

        let link = "";
        try {
          link = new URL(href);
        } catch (e) {
          // Invalid url, e.g. Anchor link.
          return match;
        }

        // Exit if the url has same host with `config.url`, which means isn't an external link.
        if (!link.protocol || link.hostname === siteHost) return match;

        if (theme.config.articles.style.link_icon == false) {
          return `<a class="link" ${attrBegin} href="${href}" ${attrEnd}>${html}</a>`;
        } else {
          return `<a class="link" ${attrBegin} href="${href}" ${attrEnd}>${html}<i class="fa-solid fa-arrow-up-right ml-[0.2em] font-light align-text-top text-[0.7em] link-icon"></i></a>`;
        }
      },
    );
  },
  0,
);