@thi.ng/mime/index.js

650+ file extension to MIME type mappings, based on mime-db

import { DB } from "./generated.js";
const __ext = (val) => val.substring(~~(val[0] === "1")).split(",");
const __group = (mime) => {
  const [prefix, suffix] = mime.split("/");
  const group = DB[prefix];
  return group ? group[suffix] : void 0;
};
const MIME_TYPES = ((defs) => {
  const res = {};
  for (let groupID in defs) {
    const group = defs[groupID];
    for (let type in group) {
      const mime = groupID + "/" + type;
      for (let e of __ext(group[type])) {
        const isLowPri = e[0] === "*";
        const ext = isLowPri ? e.substring(1) : e;
        let coll = res[ext];
        !coll && (coll = res[ext] = []);
        isLowPri ? coll.push(mime) : coll.unshift(mime);
      }
    }
  }
  return res;
})(DB);
const preferredType = (ext, fallback = MIME_TYPES.bin[0]) => {
  ext = ext.toLowerCase();
  const type = MIME_TYPES[ext[0] === "." ? ext.substring(1) : ext];
  return type ? type[0] : fallback;
};
const preferredTypeForPath = (path, fallback) => preferredType(path.substring(path.lastIndexOf(".")), fallback);
const preferredExtension = (mime, fallback = "bin") => {
  const group = __group(mime);
  const ext = group ? __ext(group) : void 0;
  return ext ? ext.find((x) => x[0] !== "*") || ext[0].substring(1) : fallback;
};
const extensionsForType = (mime) => {
  const group = __group(mime);
  const ext = group ? __ext(group) : void 0;
  return ext ? ext.map((x) => x[0] === "*" ? x.substring(1) : x) : void 0;
};
const isCompressible = (mime) => !!(__group(mime)?.[0] === "1");
export * from "./presets.js";
export {
  MIME_TYPES,
  extensionsForType,
  isCompressible,
  preferredExtension,
  preferredType,
  preferredTypeForPath
};