I use this javascript code
<input id="text" value="漢字">
var text_val = document.getElementById("text").value.length; // result will be 2 //
for as same as php code
$text_val = mb_strlen('漢字', 'utf-8'); // result will be 2 //
And then i want to know what javascript as same as this php code ?
$text_val = strlen("漢字"); // result will be 6 //