npm i url-var --save
import a from 'url-var';
//address: http://example.something/?a=10&b=20
a.url('a'); // = 10
a.url('a','b'); // = {a:10,b:20}
//address: whatever
a.str('http://example.something/?a=10&b=20','a') // = 10
a.str('http://example.something/?a=10&b=20','a','b') // = {a:10,b:20}