Exploring the world of mouse events in Typescript using JQuery, all the while maintaining strict typing regulations

I'm currently working on a project that involves using JQuery in Typescript. One challenge I'm facing is passing a mouse event from a JQuery element to a wrapper class. Here's an example of what I'm trying to achieve:

import * as $ from 'jquery'

export class Test {
  ele: JQuery;
  constructor() {
    this.ele = $('<div>Hello World</div>');
    this.ele.mousedown((evt) => { this.my_mousedown(evt); });
  }

  my_mousedown(evt: MouseEvent) {
    console.log(evt);
  }
}

The issue I'm encountering is that the type of evt being passed is incorrect:

Argument of type Event<HTMLElement | null> is not assignable to parameter of type 'MouseEvent'

I attempted to adjust my_mousedown to:

my_mousedown(Event<HTMLElement | null>
but received the error:

Event is not generic.

Lastly, when I converted evt back to its original Event type in the JQuery call, it lacked access to any mouse-specific properties like clientX. Any suggestions on how to proceed?

Answer №1

After some experimentation, I discovered that there is a different Event interface loaded from JQuery. To make everything work correctly, I had to assign the event type to JQuery.Event. For example:

import * as $ from 'jquery'

export class Test {
  ele: JQuery;

  constructor() {
    this.ele = $('<div>Hello World</div>');
    this.ele.mousedown((evt) => { this.my_mousedown(evt); });
  }

  my_mousedown(evt: JQuery.Event) {
    console.log(evt);
  }
}

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