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This package providesTypeScript guards for the Google Maps JavaScript API.

A type guard (or type predicate) is an expression that performs a runtime check that guarantees the type in some scope. Type guards are used to narrow the type of a variable or parameter.

For the complete API check thereference documentation.

Available via npm as the package@googlemaps/typescript-guards.

npm i @googlemaps/typescript-guards

The following example narrows a union typegoogle.maps.LatLng | google.maps.LatLngLiteral togoogle.maps.LatLngLiteral using theisLatLngLiteral guard.

import{isLatLngLiteral}from"@googlemaps/typescript-guards";constlatLng:google.maps.LatLng|google.maps.LatLngLiteral= ...;if(isLatLngLiteral(latLng)){lat=latLng.lat;lng=latLng.lng;}else{lat=latLng.lat();lng=latLng.lng();}