???//获得输入框中字符长度 ???function getLength(val) { ?????????var str = new String(val); ?????????var bytesCount = 0; ?????????for (var i = 0 ,n = str.length; i < n; i++) { ?????????????var c = str.charCodeAt(i); ?????????????if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) { ?????????????????bytesCount += 1; ?????????????} else { ?????????????????bytesCount += 2; ?????????????} ?????????} ?????????return bytesCount; ?????} ?var str="你好"
getLength(str)
输出：4
js获取字符串的字节长度
原文地址：https://www.cnblogs.com/Web-Architecture/p/9405635.html