Update 2021:
i tried `url.format` and `querystring` and both of them are deprecated, instead we can use `URLSearchParams`
const {URLSearchParams} = require('url')
app.get('/category', (req, res) =>{
const pathname = '/?'
const components ={
a:"a",
b:"b"
}
const urlParameters = new URLSearchParams(components)
res.redirect(pathname + urlParameters)
})