How to get the length of the Chinese and English mixed string in JavaScript

Some colleagues posted a post on the company's OA to introduce how to get the length of the Chinese -English mixed string in JavaScript.

The regular expression is used.

Copy code code as follows:

Var Str = "The tank is the transliteration of Tank";

var len = str.match (/[^ -]/g) == null? Str.Length: str.Length + Str.match (/[^ -]/g) .Length;

I checked the book and understood a bit:

The commonly used characters in Western text consist of the space "(0x20) to" ~ "(0x7e). Essence

Copy code code as follows:

String.match (reGex) will return a string of regular expression regex in the form of a string in the form of an array, so

Str.match (/[^ -~]/g) will return Chinese characters in the form of an array. For example

var str = "DD Brother";

// Show "Big, Brother", return two Chinese characters in the array, and the array length is 2

alert (str.match (/[^ -]/g);

In this way, var len = str.match (/[^ -]/g) == NULL? Str.Length: Str.Length + Str.Match (/[^ -]/g). LENGTH; The correct length is.

In JavaScript, the length of a Chinese character is also calculated as 1. It is often errors that cause excessive length in the database. Now this method can be detected before submitting.

Note: There are some problems with the above code. After the correction, it is changed to the following functions.

Copy code code as follows:

Function get_strlenth (str)

{{

var len = 0;

if (Str.Match (/[^ -]/G) == NULL)

{{

len = str.Length;

}

else

{{

len = str.length + str.match (/[^ -]/g) .length;

}

Return len;

}