typescript type object

1type Dictionary = {
2  [key: string]: any
3}

1//is not strict mode
2let endedCoord: {x: number, y: number} = {
3  	x: -1,
4  	y: -1,
5}

1if(typeof myVariable === 'string'){
2	//do
3}

1declare function create(o: object | null): void;
2// OKcreate({ prop: 0 });create(null);create(undefined); // with `--strictNullChecks` flag enabled, undefined is not a subtype of nullArgument of type 'undefined' is not assignable to parameter of type 'object | null'.2345Argument of type 'undefined' is not assignable to parameter of type 'object | null'.
3create(42);Argument of type '42' is not assignable to parameter of type 'object | null'.2345Argument of type '42' is not assignable to parameter of type 'object | null'.create("string");Argument of type '"string"' is not assignable to parameter of type 'object | null'.2345Argument of type '"string"' is not assignable to parameter of type 'object | null'.create(false);Argument of type 'false' is not assignable to parameter of type 'object | null'.2345Argument of type 'false' is not assignable to parameter of type 'object | null'.Try

1const data = {
2  value: 123,
3  text: 'text'
4};
5type Data = typeof data["text"]; 		// String

1ts// 1. Select the div element using the id property
2const app = document.getElementById("app");
3
4// 2. Create a new <p></p> element programmatically
5const p = document.createElement("p");
6
7// 3. Add the text content
8p.textContent = "Hello, World!";
9
10// 4. Append the p element to the div element
11app?.appendChild(p);