You may start from here: Windows help & learning (microsoft.com). Source: about 1 year ago

The link in the picture does nothing. It takes me to the front page for Microsoft Windows. Source: over 1 year ago

But JavaScript didn't always have a good way to construct and parse URLs built in. The URL object was first included in the ECMAScript 2015 specs. - Source: dev.to / 21 days ago

The ECMAScript 2015 (ES6) standard introduced the concept of "proper tail calls" (PTC), which mandates that compliant JavaScript engines must implement TCO for tail calls. PTC ensures that a function call in tail position does not increase the call stack size, thus allowing for potentially infinite recursive calls in constant stack space. - Source: dev.to / 6 months ago

Let was introduced in ES6ECMAScript2015. It is Block Scoped, any code written within {} is said to be in a Block. So, that's the restriction that ECMA wanted to implement with let, making variables inaccessible outside the block. - Source: dev.to / 3 months ago

Both Symbol and BigInt were the latest data type introductions to ES6. - Source: dev.to / 9 months ago

Symbol: Introduced in ECMAScript 2015, Symbol is a primitive type that represents a unique identifier. Symbols are often used as keys in objects to avoid name collisions. - Source: dev.to / about 1 year ago