The Complete Guide to ES10 Features
ES10 is no longer just a draft! All features have already been implemented in major browsers. Here is a non-alien guide for anyone interested in exploring ES10 (released June 2019.)
Here’s a list of my best web development tutorials.
Complete CSS flex tutorial on Hashnode.
Ultimate CSS grid tutorial on Hashnode.
Higher-order functions .map, .filter & .reduce on Hashnode.
My Coding Books
ES10 is not as significant as ES6 in terms of new features, but it does add several useful* things you might want to know about.
In ES6 arrow functions were hands down the most popular new feature.
What was it in ES10?
BigInt — Arbitrary precision integers
BigInt is the 7th primitive type.
BigInt is an arbitrary-precision integer. What this means is that variables can now represent 2⁵³ numbers. And not just max out at 9007199254740992.
const b = 1n; // append n to create a BigInt
In the past integer values greater than
9007199254740992 were not supported. If exceeded, the value would simply lock to MAX_SAFE_INTEGER + 1:
const limit = Number.MAX_SAFE_INTEGER;
⇨ 9007199254740991limit + 1;
⇨ 9007199254740992limit + 2;
⇨ 9007199254740992 <--- MAX_SAFE_INTEGER + 1 exceededconst larger = 9007199254740991n;
⇨ 9007199254740991nconst integer = BigInt(9007199254740991); // initialize with number
⇨ 9007199254740991nconst same = BigInt("9007199254740991"); // initialize with "string"
⇨ 'number'typeof 10n;