Need to subtract dates in Node.js? No problem, let’s use Java for that.
After installing GraalVM using SDKMAN:
$ sdk install java 20.0.1-graal
as well as installing GraalVM’s Node.js runtime using gu1:
$ gu install nodejs
we can now perform some black magic:
// index.js
// "Import" LocalDate & ChronoUnit from ☕️
const LocalDate = Java.type("java.time.LocalDate");
const ChronoUnit = Java.type("java.time.temporal.ChronoUnit");
const firstDate = LocalDate.of(2023, 7, 20);
const secondDate = LocalDate.of(2023, 8, 4);
console.log(ChronoUnit.DAYS.between(firstDate, secondDate));
$ ~/.sdkman/candidates/java/20.0.1-graal/languages/nodejs/bin/node --polyglot index.js
15
Look ma, no Moment.js, Day.js or date-fns! (Just a kickass runtime.)