javascript - insert a variable into regexp

Question

I have the following which works fine, allowing a form field to be valid if blank or containing the word \"hello\" or passing the other validation...

var re = ne         


        

Answer 1

Drop the leading and trailing / characters and your reg exp is not going what you expect. Double up the \ characters so they are escaped. Also [] means match any of these characters.

Basic example

var str = "hello world";
var word = "hello"
var re = new RegExp("^" + word + "\\s?")
console.log( str.match(re) );