node.js - Appending url query -

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this first time create application using nodejs , need little help. want append query in url clicking button.

the website has search box, , navigation sorting(most viewed,most downloaded)

ex:

when searching foo, url this.

localhost:3000/search?q=foo

but when clicked most viewed button, result be

localhost:3000/search?tab=views

expected result

localhost:3000/search?q=foo&tab=views

i found solution, checked how stackoverflow.com handles search. example, searched "hello world" here in stackoverflow.

the url https://stackoverflow.com/search?q=hello+world

and button/links following be:

relevance = https://stackoverflow.com/search?tab=relevance&q=hello+world

newest= https://stackoverflow.com/search?tab=newest&q=hello+world

sorry if question unclear solution looking for.


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