Don't use non-null assertions (`!`) — handle null explicitly | BeforeMerge Rules | BeforeMerge

Don't use non-null assertions (`!`) — handle null explicitly | BeforeMerge Rules | BeforeMerge

Why this matters

! asserts a value is non-null without proof, defeating strict null checks. Handle the absent case explicitly so the compiler stays honest.

// Bad
const el = document.getElementById("app")!;
el.innerHTML = "hi"; // crashes if element is missing
 
// Good
const el = document.getElementById("app");
if (!el) throw new Error("#app not found");
el.innerHTML = "hi";