js 根据文件大小换算合适单位，并保留两位小数
function getFileSize(fileByte) {var fileSizeByte = fileByte;var fileSizeMsg = "";if (fileSizeByte < 1048576) fileSizeMsg = (fileSizeByte / 1024).toFixed(2) + "KB";else if (fileSizeByte == 1048576) fileSizeMsg = "1MB";else if (fileSizeByte > 1048576 && fileSizeByte < 1073741824) fileSizeMsg = (fileSizeByte / (1024 * 1024)).toFixed(2) + "MB";else if (fileSizeByte > 1048576 && fileSizeByte == 1073741824) fileSizeMsg = "1GB";else if (fileSizeByte > 1073741824 && fileSizeByte < 1099511627776) fileSizeMsg = (fileSizeByte / (1024 * 1024 * 1024)).toFixed(2) + "GB";else fileSizeMsg = "文件超过1TB";return fileSizeMsg;}
解释
.toFixed(2) 表示数值保留两位小数点
