angular interface optional property code example
Example 1: how to make input in angular optional
export class ChildComponent {
@Input() showName?: boolean;
constructor() { }
}
Example 2: typescript class implements interface
interface Task{
name: String;
run(arg: any):void;
}
class MyTask implements Task{
name: String;
constructor(name: String) {
this.name = name;
}
run(arg: any): void {
console.log(`running: ${this.name}, arg: ${arg}`);
}
}
let myTask: Task = new MyTask('someTask');
myTask.run("test");