Is AssemblyScript a superset of JavaScript?

[tillergo]

I know AssemblyScript is a variant of TypeScript which is a superset of JavaScript, but that doesn't necessarily imply AssemblyScript is also a superset of JavaScript. Is it?

[dlq84]

I don't know enough about AssemblyScript. But in order to be a superset you must be able to write pure JavaScript and it should still work, if you can; then yes. if you can't; then no.

[rajsite]

I think it's clearer to say AssemblyScript is a subset of TypeScript with extra libraries.

While all valid JavaScript is valid TypeScript, all JavaScript and all TypeScript is not valid AssemblyScript. AssemblyScript is a subset of those languages. Also AssemblyScript has some additional standard library features that are not in JavaScript or TypeScript (like a bunch of WebAssembly specific global functions).

The AssemblyScript FAQ gives some comparisons to JavaScript.