Serialization of RegExp

Question

So, I was interested to find that JSON.stringify reduces a RegExp to an empty object-literal (fiddle):

JSON.stringify(/^[0-9]+$/) // \"{}\"
         


        

Answer 1

RegExp.prototype.toJSON = RegExp.prototype.toString;

var regexp = /^[0-9]+$/;
var foo = { rgx: regexp.source, date: new Date };
var stringified = JSON.stringify(foo);
new RegExp(JSON.parse(stringified).rgx)