My JavaScript code checks if the username meets certain criteria.
// Check the username
re = /^\w+$/;
if(!re.test(form.username.value)) {
alert("Alert");
form.username.focus();
return false;
}
Currently, the script only accepts letters, numbers, and underscores. I also want to allow dots and whitespaces.
Can anyone help me figure out what changes I need to make in /^\w+$/ to accept dots and whitespaces?
When it comes to selecting specific characters, character classes are your best friend. For example, if you want to include dots and spaces in your selection, you can use /^[. \w]+$/
When using regular expressions, make sure to include the dot and whitespace by utilizing a character class. You can use this reference for more information on character classes. The shorthand \s covers all types of spaces, including newline characters. If you only need standard white space, then simply use the whitespace option instead.
re = /^[\w.\s]+$/;
// To only match whitespace
re = /^[\w. ]+$/;
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