javascript regex for special characters

Question

I\'m trying to create a validation for a password field which allows only the a-zA-Z0-9 characters and .!@#$%^&*()_+-=

I can\'t seem to

Answer 1

a sleaker way to match special chars:

/\W|_/g

\W Matches any character that is not a word character (alphanumeric & underscore).

Underscore is considered a special character so add boolean to either match a special character or _

Answer 2

Complete set of special characters:

/[\!\@\#\$\%\^\&\*\)\(\+\=\.\<\>\{\}\[\]\:\;\'\"\|\~\`\_\-]/g

To answer your question:

var regular_expression = /^[A-Za-z0-9\!\@\#\$\%\^\&\*\)\(+\=\._-]+$/g

Answer 3

Regex for minimum 8 char, one alpha, one numeric and one special char:

/^(?=.*[A-Za-z])(?=.*\d)(?=.*[!@#$%^&*])[A-Za-z\d!@#$%^&*]{8,}$/

Answer 4

function nameInput(limitField)
{
//LimitFile here is a text input and this function is passed to the text 
onInput
var inputString = limitField.value;
// here we capture all illegal chars by adding a ^ inside the class,
// And overwrite them with "".
var newStr = inputString.replace(/[^a-zA-Z-\-\']/g, "");
limitField.value = newStr;
}

This function only allows alphabets, both lower case and upper case and - and ' characters. May help you build yours.

Answer 5

What's the difference?

/[a-zA-Z0-9]/ is a character class which matches one character that is inside the class. It consists of three ranges.

/a-zA-Z0-9/ does mean the literal sequence of those 9 characters.

Which chars from .!@#$%^&*()_+-= are needed to be escaped?

Inside a character class, only the minus (if not at the end) and the circumflex (if at the beginning). Outside of a charclass, .$^*+() have a special meaning and need to be escaped to match literally.

allows only the a-zA-Z0-9 characters and .!@#$%^&*()_+-=

Put them in a character class then, let them repeat and require to match the whole string with them by anchors:

var regex = /^[a-zA-Z0-9!@#$%\^&*)(+=._-]*$/

Answer 6

this is the actual regex only match:

/[-!$%^&*()_+|~=`{}[:;<>?,.@#\]]/g