js gets the number of bytes of the submitted string_javascript skills

Method 1:

Copy code The code is as follows:

function getBytesCount(str)
{
var bytesCount = 0;
if (str != null)
{
for (var i = 0; i < str.length; i )
{
var c = str.charAt(i);
if (/^[u0000-u00ff]$/.test(c))
{
bytesCount = 1;
}
else
{
bytesCount = 2;
}
}
}
return bytesCount;
}

Method 2:

Copy code The code is as follows:

function getBytesCount2(str)
{
if (str == null)
{
return 0;
}
else
{
return (str.length str.replace(/[u0000-u00ff]/g, "").length);
}
}