jQuery: Check if special characters exists in string
If you really want to check for all those special characters, it's easier to use a regular expression:
var str = $('#Search').val();
if(/^[a-zA-Z0-9- ]*$/.test(str) == false) {
alert('Your search string contains illegal characters.');
}
The above will only allow strings consisting entirely of characters on the ranges a-z
, A-Z
, 0-9
, plus the hyphen an space characters. A string containing any other character will cause the alert
.
var specialChars = "<>@!#$%^&*()_+[]{}?:;|'\"\\,./~`-="
var check = function(string){
for(i = 0; i < specialChars.length;i++){
if(string.indexOf(specialChars[i]) > -1){
return true
}
}
return false;
}
if(check($('#Search').val()) == false){
// Code that needs to execute when none of the above is in the string
}else{
alert('Your search string contains illegal characters.');
}