How to replace a dynamic value in JavaScript/jQuery?

Question

How can I replace dynamic value in javascript/jquery?

I have a string like this myURL = http://www.demo.com?a=1&sp=2&c=3; I want to replace sp=2 with string like 'str=3'. The value of 'sp' can change like 3,4,5, etc.

I am using replace function of jQuery, but I am not sure how can I replace the dynamic value of 'sp'

myURL.replace("sp=2", "str=3");

Any idea?

DontVoteMeDown · Accepted Answer · 2019-03-01 13:55:25Z

3

Try using regex:

var myURL = "http://www.demo.com?a=1&sp=2&c=3";
var replacementNum = 123;

myURL = myURL.replace(/sp=\d+/g, 'sp=' + replacementNum);

Demo

The code above will replace sp= parameter with any number to the given replacement number. It is useful when you don't know sp paramenter value.

var myURL = "http://www.demo.com?a=1&sp=2&c=3";
var replacementNum = 123;

myURL = myURL.replace(/sp=\d+/g, 'sp=' + replacementNum);
console.log(myURL);

edited Mar 1, 2019 at 13:55

answered Mar 28, 2016 at 14:05

DontVoteMeDown

21.5k10 gold badges72 silver badges113 bronze badges

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

1 Comment

DontVoteMeDown Over a year ago

@Rahul glad to help!

gurvinder372 · Accepted Answer · 2016-03-28 14:08:16Z

0

you need to assign it back to myURL

myURL = myURL.replace("sp=2", "str=3");

replace will return a value, it won't change the myURL value on its own.

answered Mar 28, 2016 at 14:08

gurvinder372

68.6k11 gold badges78 silver badges98 bronze badges

Collectives™ on Stack Overflow

How to replace a dynamic value in JavaScript/jQuery?

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related