Function keysOf

Gets the keys of the specified dict as an array that won't throw a TypeScript error if you try to loop through them and access values from the corresponding dict.

Only use this function when you know that the return value of Object.keys will always correspond to the keys of the specified dict and doesn't contain any extra keys (which is probably the case most of the time if you're using plain JS objects).

const value = { a: 1, b: 2, c: 3 };

const untypedKeys = Object.keys(value);
for (const key of untypedKeys) {
  // This will throw a TypeScript error:
  console.log(value[key]);
}

const typedKeys = keysOf(value);
for (const key of typedKeys) {
// This will *not* throw a TypeScript error:
  console.log(value[key]);
}
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