javascript 在Ramda制作镜头

Posted 2021-05-04

import { lensPath, view } from 'ramda';

const complexObject = { level1: { level2: { prop1: 1, prop2: 2 } } };
const prop1Lens = lensPath(['level1', 'level2', 'prop1']);

console.assert(view(prop1Lens, complexObject) === 1);