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JQuery获取字符串字节长度

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function getByteLen(val) {
    var len = 0;
    for (var i = 0; i < val.length; i++) {
        var code = val.charCodeAt(i);
        if (code >= 0 && code <= 128) {
            len += 1;
        } else {
            len += 2;
        }
    }
    return len;
}
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