JavaScript 大小转化B KB MB GB等的转化

当我们知道B字节时，转化成KB MB GB 等等

function conver(limit){var size = "";if( limit < 0.1 * 1024 ){ //如果小于0.1KB转化成Bsize = limit.toFixed(2) + "B"; }else if(limit < 0.1 * 1024 * 1024 ){//如果小于0.1MB转化成KBsize = (limit / 1024).toFixed(2) + "KB";}else if(limit < 0.1 * 1024 * 1024 * 1024){ //如果小于0.1GB转化成MBsize = (limit / (1024 * 1024)).toFixed(2) + "MB";}else{ //其他转化成GBsize = (limit / (1024 * 1024 * 1024)).toFixed(2) + "GB";}var sizestr = size + ""; var len = sizestr.indexOf("\.");var dec = sizestr.substr(len + 1, 2);if(dec == "00"){//当小数点后为00时 去掉小数部分return sizestr.substring(0,len) + sizestr.substr(len + 3,2);}return sizestr;}