How to open different parameters in google search same tab using javascript?

Question

I need to open different search parameter in google search same tab using java script.

No need to change http://google.com/search?q' in all time. I want show it in same tab when click search result.

let q = 'params';
// q = 123 or 213
window.open('http://google.com/search?q='+q ,'_blank');