TypeScript type checking not performed properly?

[X-m7]

Starting from the template generated by npm init wmr your-project-name, renaming all the .js files to .tsx and uncommenting the "strict": true option in tsconfig.json I was able to add nonsensical statements like const x: number = "abc"; while not getting any errors whatsoever with both the start and build commands. In fact, with prerendering disabled (which I unfortunately need to do for the project I am working on since it is a Tauri app and the frontend code is useless in the Node.js context) the build command still works even with egregious mistakes like attempting to reassign a const variable or using an undeclared variable.

So, is there something I am missing here? To me the entire point of TypeScript is to be able to check things before the code runs and crashes (or otherwise misbehaves), and I am also coming from preact-cli (which does include proper type checking in the build command for the TypeScript template).

Also, I saw a comment on another discussion saying that WMR uses Sucrase to transpile TypeScript, but then looking at Sucrase's readme it states (emphasis added by me) "Compiles TypeScript code to JavaScript, removing type annotations and handling features like enums. Does not check types.", is that comment still accurate?

[rschristian]

Indeed, this behavior is correct; use tsc instead to check types.

Most modern build tools no longer support type checking as it's egregiously slow. It's better to leave that up to the editor or a type checking script instead.

To me the entire point of TypeScript is to be able to check things before the code runs and crashes (or otherwise misbehaves)

This is super easy to do:

        "scripts": {
		"start": "wmr",
-		"build": "wmr build --prerender",
+		"build": "tsc && wmr build --prerender",
		"serve": "wmr serve"
	},