js, intercept the length of the string, string, length js intercept the length of the string (Chinese and English)

js intercepts the length of the string. When intercepting, the Chinese is calculated as 2 bytes.

function worldLimit(className, factLength){

$('.'+className).each(function(){
var content = $(this ).text();
var allLength = 0;
for (var i = 0; i < content.length; i++) {
var c = content.charCodeAt(i);
//Single byte plus 1
if ((c >= 0x0001 && c <= 0x007e) || (0xff60 <= c && c <= 0xff9f)) {
                                                                                                         1
                                                                                                                                                                                                                                    0; i < content.length; i++) {
        var c = content.charCodeAt(i);
                                                                                                                                                                            subLength++ ;
                                                                                                                                          ;
                                                                                                                                                                                 
             }
}
                $(this).text(subContent);                                                                                                         $(this).