Get duration of video or audio in react browser

media.js

export const getVideoDuration = async (file) =>
  new Promise((resolve, reject) => {
    const mediaType = file.type.split("/")[0];
    if (mediaType === "video" || mediaType === "audio") {
      var video = document.createElement(mediaType);
      video.preload = "metadata";
      video.onloadedmetadata = function() {
        window.URL.revokeObjectURL(video.src);
        resolve(video.duration);
      };
      video.onerror = reject;
      video.src = URL.createObjectURL(file);
    } else {
      resolve();
    }
  });