zip3

Background

Using the first three digits of a US zip code, you can roughly approximate which metropolitan area that zip code is associated with.

Demo

!zip3 gif

Code Sandbox: https://codesandbox.io/s/zip3-demo-rj8oc

Data

https://en.wikipedia.org/wiki/List_of_ZIP_Code_prefixes

High Level Design

This package exports a dictionary where the keys are the three-digit zip code prefixes, and the values are objects containing id (the three-digit zip), city, and state (if available).

For example:

``js
{
"440": { "id": "440", "city": "Cleveland", "state": "OH" }
}
`

Usage

`js
import { useState } from "react"
import zips from "zip3"

function MetroParser() {
const [zip, setZip] = useState("90210")
const shortenedZip = zip.slice(0, 3)
const metroObject = zips[shortenedZip] || {}
const { city, state } = metroObject
const metroString = city && state ? ${city}, ${state} : ""

return (



)
}
``