In angular,
This is script
<button (click)="onClick($event)"> Greet </button> <button (click)="greeting='welcome' "> Greet </button> {{greeting}} This is event Logic
public greeting =""; onClick(event) { console.log(event); this.greeting ='welcome'; } 14 Answers
Some alternatives you can use:
onClick(event: Event) {} onClick(event: MouseEvent) {} Also, if you are not using the parameter event for anything, you can remove it.
onClick() { ... } Reason: If you have any chance to use Angular in previous versions when you create a new project you might see some question like this. And this question is very important. 
Fix: You can either follow the stricter type checking rule or manually switch the stricter type checking to false. It worked for me. 
in tsconfig.js change
"noImplicitAny": false to true or add it if it not found
On click of that button on console, we can see PoinerEvent { isTrusted": true }
So in addition to MouseEvent or Event you can also use:
onClick(event: PointerEvent) {} Check the docs at PointerEvent MDN. "This interface inherits properties from MouseEvent and Event."
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