I know this question is asked more often here on Stack, but I can't seem to get a straight answer out of the questions already posted.
I need to check if all special characters (except -) are in a string, if so, then give the user an alert.
What I have so far is this:
if($('#Search').val().indexOf('@') == -1 || $('#Search').val().indexOf('#') == -1 || $('#Search').val().indexOf('$') == -1 || $('#Search').val().indexOf('%') == -1 || $('#Search').val().indexOf('^') == -1 || $('#Search').val().indexOf('&') == -1 || $('#Search').val().indexOf('*') == -1 || $('#Search').val().indexOf('(') == -1 || $('#Search').val().indexOf(')') == -1 || $('#Search').val().indexOf('_') == -1 || $('#Search').val().indexOf('\'') == -1 || $('#Search').val().indexOf('\"') == -1 || $('#Search').val().indexOf('\\') == -1 || $('#Search').val().indexOf('|') == -1 || $('#Search').val().indexOf('?') == -1 || $('#Search').val().indexOf('/') == -1 || $('#Search').val().indexOf(':') == -1 || $('#Search').val().indexOf(';') == -1 || $('#Search').val().indexOf('!') == -1 || $('#Search').val().indexOf('~') == -1 || $('#Search').val().indexOf('`') == -1 || $('#Search').val().indexOf(',') == -1 || $('#Search').val().indexOf('.') == -1 || $('#Search').val().indexOf('<') == -1 || $('#Search').val().indexOf('>') == -1 || $('#Search').val().indexOf('{') == -1 || $('#Search').val().indexOf('}') == -1 || $('#Search').val().indexOf('[') == -1 || $('#Search').val().indexOf(']') == -1 || $('#Search').val().indexOf('+') == -1 || $('#Search').val().indexOf('=') == -1)
{
// Code that needs to execute when none of the above is in the string
}
else
{
alert('Your search string contains illegal characters.');
}
But this doesn't seem to work... Can anyone help me on this matter?
Thanks in advance!
Guido
This question is related to
javascript
jquery
special-characters
You are checking whether the string contains all illegal characters. Change the ||
s to &&
s.
You could also use the whitelist method -
var str = $('#Search').val();
var regex = /[^\w\s]/gi;
if(regex.test(str) == true) {
alert('Your search string contains illegal characters.');
}
The regex in this example is digits, word characters, underscores (\w) and whitespace (\s). The caret (^) indicates that we are to look for everything that is not in our regex, so look for things that are not word characters, underscores, digits and whitespace.
var specialChars = "<>@!#$%^&*()_+[]{}?:;|'\"\\,./~`-="
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.');
}
Source: Stackoverflow.com