IsYesterday · Day.js

IsYesterday añade la API .isYesterday() para indicar si el objeto Day.js es ayer o no.

var isYesterday = require("dayjs/plugin/isYesterday");
// import isYesterday from 'dayjs/plugin/isYesterday' // ES 2015

dayjs.extend(isYesterday);

dayjs().add(-1, "day").isYesterday(); // true