Dynamic Regular Expression for values in java script

Question

There is a problem in java script regular expression .I want my regular expression should be dynamic and it match the string with starting characters.This issue happens in auto complete

Example:

var myString = "tester Developer" ;

variable = values which typed in input fields;

var regExp = ('^' + variable + '$');

This regExp is change when user type a character.. if user types ' t' (or) 'te' (or) 'tes' ... it returns true. if 'td','ht','fd'(which is not a starting letter of myString) it returns false..

possible duplicate of How do you pass a variable to a Regular Expression JavaScript? — Eric Wendelin
– Eric Wendelin, Commented Nov 27, 2012 at 3:49

gregghz · Accepted Answer · 2012-11-27 03:19:57Z

1

I think what you are looking for is this:

var re = new RegExp("ab+c");

See this for a more detailed explanation: https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Regular_Expressions

answered Nov 27, 2012 at 3:19

gregghz

3,9757 gold badges46 silver badges71 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

gauti Over a year ago

how do i check it with my string

gregghz Over a year ago

var re = new RegExp("^" + variable + "$");

gauti Over a year ago

It matches only both string are same. but what i want is str1=" tester" str2 ="tes" or str2="te" like this..the match fun returns true for str1 and for given str2's matches... its for auto complete process

gregghz Over a year ago

oh. your question is about regular expressions. Not javascript. var re = new RegExp('^' + variable + '.*$'); i believe.

Collectives™ on Stack Overflow

Dynamic Regular Expression for values in java script

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related