javascript - how to check entered regex pattern and example are correct or not -
i have 2 textbox in form. first regex pattern, , second input text. i try check enter regex pattern , entered text matches or not. this my simple attempt . and working demo: '01-01-2012'.match( /\d{2}-\d{2}-\d{4}/ ) fiddle any solution query? use var pattern = new regexp($('#pattern').val()); . in case have enter pattern without slashes, \d{2}-\d{2}-\d{4} (or can make check presence , cut them). though can create regexp in code var pattern = /\d{2}-\d{2}-\d{4}/ , when pattern input field , assign variable, javascript not parse regular expression, assign string variable. , because of have explicitly create regexp object , pass string constructor, interpreter create regular expression it.
