Seeing many typescript errors after cloning, "npm install" and "npm start"

[BoiseBaked]

A few examples.
../async_pipe.d.ts(39,38): error TS2304: Cannot find name 'Promise'.
../index.d.ts(47,36): error TS2304: Cannot find name 'Iterable'.
../index.d.ts(1479,36): error TS2339: Property 'for' does not exist on type 'SymbolConstructor'.

[BoiseBaked]

Answering my question:

Let me add a little more detail to @milesaylward answer. You add "lib" : ["es2015", "es2015.iterable", "dom"] as an entry to the "compilerOptions": property found in the tsconfig.json file. E.g.

{
    "compilerOptions": {
        "target": "es5",
        ... // skipping entries here
        "suppressImplicitAnyIndexErrors": true, // Don't forget to add the comma here.
        "lib" : ["es2015", "es2015.iterable", "dom"]
    }
}

Again, I have no idea why this works. If someone can explain what the problem was and how the "lib" compile option fixed the issue - please, please do.

Many thanks in advanced.