Light, fast, tree-based way to get cities by zipcode and location.
npm install zips
const zips = require("zips");
U.S. postal codes only. For now.
If zipcode is found, returns a place object with zipcode, city, state, lat, long. Returns
null if zipcode not found.
zips.getByLocation(lat: float, long: float)
Returns the closest place object to the specified coordinates.
Under the hood
zips doesn't load its data until the first time a function is called. The longest loading time I've seen is 100ms. After that, sub-millisecond returns can be expected.
I saw a lot of zip database modules on npm, but I was displeased with three aspects
- Old data (zips uses 2010 US Census data from geonames.org, the most up-to-date I could find).
- Huge, raw data (zips' data is pre-processed so it can just load and go).
- List searching (zips organizes its data into trees instead of going down a list until a match is found or a large hash table).
I hope you're happy too.