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js substr supports Chinese interception of function codes (Chinese is double bytes)_javascript skills

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WBOYOriginal
2016-05-16 17:36:381406browse

Copy code The code is as follows:


Copy code The code is as follows:

function mb_strlen(str) {
var len = 0;
for(var i = 0; i < str.length; i ) {
len = str.charCodeAt(i) < 0 || str.charCodeAt(i) > 255 ? (charset == 'utf-8' ? 3 : 2) : 1;
}
return len;
}

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