Did you know that eval's content see the current context? I mean, const x = 1; return eval('x') will return 1.

Well, that's not all the magic.

const x = 1;
eval('x + 2') // 3

const x = 1;
window.eval('x + 2') // Uncaught ReferenceError: x is not defined

const x = 1;
const eval2 = eval;
eval2('x + 2') // Uncaught ReferenceError: x is not defined

const x = 1;
(0, eval)('x + 2') // Uncaught ReferenceError: x is not defined

The first one is called "direct eval" and the rest are "indirect evals".

TIL that Vite (esbuild) warns you about using direct evals. See the reasons here.