javascript - Regex Expression to allow underscore,hyphen and '&' symbol -


regex expression allow alphanumeric , special characters '-','_','&' only. have tried regex not working !

var testexp=/^[a-za-z0-9-_&]+$/;

you need put - @ end (or @ beginning) of class if want considered real char:

/^[a-za-z0-9_&-]+$/

you use shortcut \w, same [a-za-z0-9_]. thus:

/^[\w&-]+$/

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