How to use the mime.load function in mime

opts.root = dir;
  if (defaultExt && /^\./.test(defaultExt)) {
    defaultExt = defaultExt.replace(/^\./, '');
  }

  // Support hashes and .types files in mimeTypes @since 0.8
  if (opts.mimeTypes) {
    try {
      // You can pass a JSON blob here---useful for CLI use
      opts.mimeTypes = JSON.parse(opts.mimeTypes);
    } catch (e) {
      // swallow parse errors, treat this as a string mimetype input
    }
    if (typeof opts.mimeTypes === 'string') {
      mime.load(opts.mimeTypes);
    } else if (typeof opts.mimeTypes === 'object') {
      mime.define(opts.mimeTypes);
    }
  }

  function shouldReturn304(req, serverLastModified, serverEtag) {
    if (!req || !req.headers) {
      return false;
    }

    const clientModifiedSince = req.headers['if-modified-since'];
    const clientEtag = req.headers['if-none-match'];
    let clientModifiedDate;

    if (!clientModifiedSince && !clientEtag) {
      // Client did not provide any conditional caching headers

headers = opts.headers,
      serverHeader = opts.serverHeader,
      weakEtags = opts.weakEtags,
      handleOptionsMethod = opts.handleOptionsMethod;

  opts.root = dir;
  if (defaultExt && /^\./.test(defaultExt)) defaultExt = defaultExt.replace(/^\./, '');

  // Support hashes and .types files in mimeTypes @since 0.8
  if (opts.mimeTypes) {
    try {
      // You can pass a JSON blob here---useful for CLI use
      opts.mimeTypes = JSON.parse(opts.mimeTypes);
    } catch (e) {}
    if (typeof opts.mimeTypes === 'string') {
      mime.load(opts.mimeTypes);
    }
    else if (typeof opts.mimeTypes === 'object') {
      mime.define(opts.mimeTypes);
    }
  }


  return function middleware (req, res, next) {

    // Strip any null bytes from the url
    // This was at one point necessary because of an old bug in url.parse
    //
    // See: https://github.com/jfhbrook/node-ecstatic/issues/16#issuecomment-3039914
    // See: https://github.com/jfhbrook/node-ecstatic/commit/43f7e72a31524f88f47e367c3cc3af710e67c9f4
    //
    // But this opens up a regex dos attack vector! D:

opts.root = dir;
  if (defaultExt && /^\./.test(defaultExt)) {
    defaultExt = defaultExt.replace(/^\./, '');
  }

  // Support hashes and .types files in mimeTypes @since 0.8
  if (opts.mimeTypes) {
    try {
      // You can pass a JSON blob here---useful for CLI use
      opts.mimeTypes = JSON.parse(opts.mimeTypes);
    } catch (e) {
      // swallow parse errors, treat this as a string mimetype input
    }
    if (typeof opts.mimeTypes === 'string') {
      mime.load(opts.mimeTypes);
    } else if (typeof opts.mimeTypes === 'object') {
      mime.define(opts.mimeTypes);
    }
  }

  function shouldReturn304(req, serverLastModified, serverEtag) {
    if (!req || !req.headers) {
      return false;
    }

    const clientModifiedSince = req.headers['if-modified-since'];
    const clientEtag = req.headers['if-none-match'];
    let clientModifiedDate;

    if (!clientModifiedSince && !clientEtag) {
      // Client did not provide any conditional caching headers

opts.root = dir;
  if (defaultExt && /^\./.test(defaultExt)) {
    defaultExt = defaultExt.replace(/^\./, '');
  }

  // Support hashes and .types files in mimeTypes @since 0.8
  if (opts.mimeTypes) {
    try {
      // You can pass a JSON blob here---useful for CLI use
      opts.mimeTypes = JSON.parse(opts.mimeTypes);
    } catch (e) {
      // swallow parse errors, treat this as a string mimetype input
    }
    if (typeof opts.mimeTypes === 'string') {
      mime.load(opts.mimeTypes);
    } else if (typeof opts.mimeTypes === 'object') {
      mime.define(opts.mimeTypes);
    }
  }

  function shouldReturn304(req, serverLastModified, serverEtag) {
    if (!req || !req.headers) {
      return false;
    }

    const clientModifiedSince = req.headers['if-modified-since'];
    const clientEtag = req.headers['if-none-match'];
    let clientModifiedDate;

    if (!clientModifiedSince && !clientEtag) {
      // Client did not provide any conditional caching headers

opts.root = dir;
  if (defaultExt && /^\./.test(defaultExt)) {
    defaultExt = defaultExt.replace(/^\./, '');
  }

  // Support hashes and .types files in mimeTypes @since 0.8
  if (opts.mimeTypes) {
    try {
      // You can pass a JSON blob here---useful for CLI use
      opts.mimeTypes = JSON.parse(opts.mimeTypes);
    } catch (e) {
      // swallow parse errors, treat this as a string mimetype input
    }
    if (typeof opts.mimeTypes === 'string') {
      mime.load(opts.mimeTypes);
    } else if (typeof opts.mimeTypes === 'object') {
      mime.define(opts.mimeTypes);
    }
  }

  function shouldReturn304(req, serverLastModified, serverEtag) {
    if (!req || !req.headers) {
      return false;
    }

    const clientModifiedSince = req.headers['if-modified-since'];
    const clientEtag = req.headers['if-none-match'];
    let clientModifiedDate;

    if (!clientModifiedSince && !clientEtag) {
      // Client did not provide any conditional caching headers

import * as mime from "mime";

let str: string;
const obj: {} = {};
const fallback: string = '';

str = mime.lookup(str, fallback);
str = mime.extension(str);
mime.load(str);
mime.define(obj);

str = mime.charsets.lookup(str);