web-utils-super/formatFileSize.js

前端函数库

/**
 * @desc: 格式化文件大小
 * @param {Number} fileSize
 * @return {String}
 */
function formatFileSize(fileSize) {
  if (fileSize < 1024) {
    return `${fileSize}B`;
  }
  if (fileSize < 1024 * 1024) {
    let temp = fileSize / 1024;
    temp = temp.toFixed(2);
    return `${temp}KB`;
  }
  if (fileSize < 1024 * 1024 * 1024) {
    let temp = fileSize / (1024 * 1024);
    temp = temp.toFixed(2);
    return `${temp}MB`;
  }
  let temp = fileSize / (1024 * 1024 * 1024);
  temp = temp.toFixed(2);
  return `${temp}GB`;
}

module.exports = formatFileSize;