TLDR Strict mode in TypeScript turns on 8 safety checks at once with one line: "strict": true in your tsconfig. json . It catches null errors, missing types, uninitialized class properties, and more before your code ever runs.
Source: [Dev.to](https://dev.to/krunalkanojiya/how-to-enable-strict-mode-and-why-you-should-always-use-it-4fc1)