mercator-proj/src/viewport/assert.ts

[](https://travis-ci.com/sakitam-gis/mercator-proj) [![GZIP size](http://img.badgesize.io/https://unpkg.com/mercator-proj/dist/mercator-proj.min.js?compression=gzip&label=gzip%20s

export default function assert(condition: boolean, message?: string) {
  if (!condition) {
    throw new Error(message || 'mercator-proj: assertion failed.');
  }
}