js 檔案大小單位換算
阿新 • • 發佈:2019-01-22
js 根據檔案大小換算合適單位,並保留兩位小數
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 = "檔案超過1TB";
return fileSizeMsg;
}
解釋
.toFixed(2) 表示數值保留兩位小數點