postcss-font-family-fangsong/dist/index.bundle.cjs

Use the fangsong font family in CSS

'use strict';

// plugin
function creator(opts) {
  const {
    family,
    preserve = true
  } = Object(opts);
  let fangsongFamily = family;

  if (typeof family === "string") {
    fangsongFamily = family.trim().split(/\s*,\s*/);
  } else if (!family) {
    fangsongFamily = ["STFangsong", // macOS, Office
    "FangSong", // Windows NT 6.0+
    "FangSong_GB2312" // Windows 95/98 4.0 - 5.2
    ];

    if (preserve) {
      fangsongFamily.unshift("fangsong");
    }
  } // fangsong and fallbacks match


  const whitespace = "[\\f\\n\\r\\x09\\x20]";
  const fangsongMatch = new RegExp(`(^|,|${whitespace}+)(?:fangsong${whitespace}*)(?:,${whitespace}*(?:${fangsongFamily.join("|")})${whitespace}*)?(,|$)`, "i"); // system-ui fallback replacement

  const fangsongReplace = `$1${fangsongFamily.join(", ")}$2`;
  const visited = new WeakSet();
  return {
    postcssPlugin: "postcss-font-family-fangsong",

    Declaration(decl) {
      // update font declarations to polyfill fangsong usage
      if (decl.prop.match(fontPropertyMatch) && !visited.has(decl)) {
        decl.value = decl.value.replace(fangsongMatch, fangsongReplace);
        visited.add(decl);
      }
    }

  };
}
creator.postcss = true;
/* match the following properties:
 * - font
 * - font-family
 * - custom properties (see https://www.w3.org/TR/css-variables-1/#custom-property)
 */

const fontPropertyMatch = /(?:^(?:-|\\002d){2})|(?:^font(?:-family)?$)/i;

module.exports = creator;