d3-geo not working in React about d3-geo

[QCmu]

@curran Thanks but still not working.
WorldMap.js:62 Uncaught (in promise) TypeError: d3.geoMercator is not a function

[curran]

Try

import * as d3 from 'd3'

or

import { geoMercator } from 'd3'

[mbostock]

This looks like an import error, but I can’t say whether it was just your attempt to import the default export that doesn’t exist, or if there is a problem with your React toolchain configuration such that it’s not importing from the package.json’s defined module entry (rather than the main entry which points to the Rollup-generated ES5 bundle which is strongly not recommended for ES6 and later environments).