how to get users location from browser programatically before going to map

You can use this Java script code on the page where you need the current location of user From this code you will get the latitude and longitude.

navigator.geolocation.getCurrentPosition((position)=> {
    const p=position.coords;
    console.log(p.latitude,p.longitude);
})

Hi @dianacastillo
I recalled that this was faced sometime ago, but couldn't make it work by some embedded setup / settings in the Geofield module,
and (I feel) some custom frontend js hack should rather be applied.

Please refer to this existing issue / thread that looks very related to what you are trying to accomplish:
https://www.drupal.org/project/geofield/issues/3065776 →

Closing this, due to lack of activity, after being marked as "needs review".

Automatically closed - issue fixed for 2 weeks with no activity.