JavaScript獲取文件大小

JavaScript獲取文件大小

var fileSize = Math.round(file.size / 1024);
var suffix   = 'KB';
if (fileSize > 1000) {
   fileSize = Math.round(fileSize / 1000);
   suffix   = 'MB';
}
var fileSizeParts = fileSize.toString().split('.');
fileSize = fileSizeParts[0];
if (fileSizeParts.length > 1) {
   fileSize += '.' + fileSizeParts[1].substr(0,2);
}
fileSize += suffix;