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I'm going to test inserted character if it is rtl or ltr and I used this code:
function checkRTL(s) {
var ltrChars = 'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02B8\u0300-\u0590\u0800-
\u1FFF' + '\u2C00-\uFB1C\uFDFE-\uFE6F\uFEFD-\uFFFF',
rtlChars = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC',
rtlDirCheck = new RegExp('^[^' + ltrChars + ']*[' + rtlChars + ']');
return rtlDirCheck.test(s);
}
;
function checkSpecialChars(s) {
var sChars = '0-9`~!@#$%^&*()_+\\-=\\|\\[\\]{};\'":,.<>/',
checkChar = new RegExp('^[' + sChars + ']+');
return checkChar.test(s);
}
var input = $('#password').on('keypress', keypress);
function keypress(e) {
setTimeout(function () {
var isRTL = checkRTL(String.fromCharCode(e.charCode));
var isSpecial = checkSpecialChars(String.fromCharCode(e.charCode));
var dir = isRTL ? 'RTL' : 'LTR';
if(dir=='RTL'){
document.getElementById("langDir").innerHTML="<img src='../img
/signup_images/att.png'>Hello!";
$("#langDir").css("display","block");
}
else
{
document.getElementById("langDir").innerHTML="";
$("#langDir").css("display","none");
}
}, 100);
}
This Code is working perfectly in IE 9, 10, Chrome and Firefox. But It's not working in IE8 After some debugging I've found out that this line:
rtlDirCheck = new RegExp('^[^' + ltrChars + ']*[' + rtlChars + ']');
return rtlDirCheck.test(s);
always returns False. What is wrong with that?
732
First of all I can detect nothing wrong with your regex. Also with the following html IE 7 to 10 always tells me the result equals true (I am using IE 10.0 in backwards compatibility modes).
<html>
<body>
<script>
var ltrChars = 'A-Za-z\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF' + '\u2C00-\uFB1C\uFDFE-\uFE6F\uFEFD-\uFFFF',
rtlChars = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC',
rtlDirCheck = new RegExp('^[^' + ltrChars + ']*[' + rtlChars + ']');
alert("result = "+ rtlDirCheck.test('\u0591') );
</script>
</body>
</html>
The problem is thus not this function. It most likely is its input:
String.fromCharCode(e.charCode)
IE doesn't set e.charCode, but used e.keyCode. Actually e.charCode is only used by webkit browsers. Have a look at chapter 3 of this excellent breakdown of all the differences between keyboard events in different browser. I would suggest using:
String.fromCharCode(e.which || e.keyCode)
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