typescript type interface

1interface IEmployee {
2    empCode: number;
3    empName: string;
4    getSalary: (number) => number; // arrow function
5    getManagerName(number): string; 
6}
7

1interface IPerson {
2  name: string
3  age: number
4  hobby?: string[]
5}
6
7class Person implements IPerson {
8  name: string
9  age: number
10  hobby?: string[]
11
12  constructor(name: string, age: number, hobby: string[]) {
13    this.name = name
14    this.age = age
15    this.hobby = hobby
16  }
17}
18
19const output = new Person('john doe', 23, ['swimming', 'traveling', 'badminton'])
20console.log(output)
21

1// https://stackoverflow.com/a/41967120
2// `I` Prefix not recommended : 
3// Ref : https://stackoverflow.com/a/41967120, 
4//       https://github.com/Microsoft/TypeScript/wiki/Coding-guidelines
5interface SquareConfig {
6  color?: string;
7  width?: number;
8  [propName: string]: any;
9}
10
11interface StringArray {
12  [index: number]: string;
13}
14 
15let myArray: StringArray;
16myArray = ["Bob", "Fred"];
17 
18let myStr: string = myArray[0];
19

1//INTERFACE	                                TYPE
2interface Animal {	                        type Animal = {
3    name: string;	                            name: string;
4}	                                        }
5interface Bear extends Animal {	            type Bear = Animal & { 
6    honey: boolean;	                            honey: Boolean;
7}	                                        }
8
9const bear = getBear();	                    const bear = getBear();
10bear.name;	                                bear.name;
11bear.honey;	                                bear.honey;

1interface LabeledValue {
2  label: string;
3}
4
5function printLabel(labeledObj: LabeledValue) {
6  console.log(labeledObj.label);
7}
8
9let myObj = { size: 10, label: "Size 10 Object" };
10printLabel(myObj);Try
11

1running: someTask, arg: test