methods to detect consumer zipcode and put it aside to cart web page in calculate delivery area and checkout web page (state, metropolis as per zipcode)?

methods to auto detect consumer zipcode utilizing geolocator ? and put it aside to cart web page delivery calculate area (additionally save state metropolis as per zipcode utilizing google api) and likewise save in addition to checkout and my account web page ?

i would like this as a result of i need to change product value enhance and reduce as per consumer zipcode for us web site.

1. i used product value as per pincode plugin for : consumer can enter zipcode in residence web page utilizing popup manually. (i edit customized code additionally)
   (after enter zipcode it show in cart delivery calculate area (state and metropolis additionally show there as per zipcode utilizing api) however not save simply show solely. for save need to click on on replace after visiting cart web page. its not save disrect utilizing popup.

2. i used low cost rule professional plugin for value low cost as per state.
   this plugin work however want to go to the cart for refresh zipcode supplied by popup.

So assist me methods to replace zipcode in cart web page with out vising the cart web page…..