function bytesToSize(bytes) {if (bytes === 0) return '0 b';var k = 1024, // or 1024 or 1000sizes = ['b', 'Kb', 'Mb', 'Gb', 'Tb', 'Pb', 'Eb', 'Zb', 'Yb'],i = Math.floor(Math.log(bytes) / Math.log(k));//Math.floor返回小于等于x的最大整数:,Math.log返回k的自然对数:return (bytes / Math.pow(k, i)).toPrecision(3) + ' ' + sizes[i];//Math.pow(k, i),返回 k 的 i 次幂 (k*k*k):,toPrecision() 方法可在对象的值超出指定位数时将其转换为指数计数法。
}console.log(bytesToSize(1059691306))

var byteConvert = function(bytes) {if (isNaN(bytes)) {return '';}var symbols = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];var exp = Math.floor(Math.log(bytes)/Math.log(2));if (exp < 1) {exp = 0;}var i = Math.floor(exp / 10);bytes = bytes / Math.pow(2, 10 * i);if (bytes.toString().length > bytes.toFixed(2).toString().length) {bytes = bytes.toFixed(2);}return bytes + ' ' + symbols[i];
};console.log(byteConvert(1059691306))

byteChange = byte => {let size = ''if (byte < 0.1 * 1024) { // 小于0.1KB 则转化成Bsize = byte.toFixed(2) + 'B'}else if (byte < 0.1 * 1024 * 1024) { // 小于0.1MB 则转换成KBsize = (byte / 1024).toFixed(2) + 'KB'}else if (byte < 0.1 * 1024 * 1024 * 1024) { // 小于0.1GB 则转换成MBsize = (byte / (1024 * 1024)).toFixed(2) + 'MB'}else if (byte < 0.1 * 1024 * 1024 * 1024 * 1024) { // 小于0.1TB 则转换成GBsize = (byte / (1024 * 1024 * 1024)).toFixed(2) + 'GB'}else if (byte < 0.1 * 1024 * 1024 * 1024 * 1024 * 1024) { // 小于0.1PB 则转换成TBsize = (byte / (1024 * 1024 * 1024 * 1024)).toFixed(2) + 'TB'}else if (byte < 0.1 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024) { // 小于0.1EB 则转换成PBsize = (byte / (1024 * 1024 * 1024 * 1024 * 1024)).toFixed(2) + 'PB'}else if (byte < 0.1 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024) { // 小于0.1ZB 则转换成EBsize = (byte / (1024 * 1024 * 1024 * 1024 * 1024 * 1024)).toFixed(2) + 'EB'}else if (byte < 0.1 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024) { // 小于0.1YB 则转换成ZBsize = (byte / (1024 * 1024 * 1024 * 1024 * 1024 * 1024 * 1024)).toFixed(2) + 'ZB'}return size}console.log(byteChange(1059691306))