Mapbox事件监听器

Question

I've added custom buttons to my MapBox map and they shop up correctly. However when I add a click listener it does not work. I see no error in my console.

The code looks like this:

const currentLocationControl = new CustomControl('current-location-control', 'GPS');

this.map.addControl(currentLocationControl, 'top-left');

document.getElementById('test').addEventListener('click', function (e) {
    alert('test');
});

I execute this code in the mounted method from vue.js .

The CustomControl:

export default class CustomControl {

    constructor(className, text) {
        this.className = className;
        this.text = text;
    }

    onAdd(map){
        this.map = map;
        this.container = document.createElement('div');
        this.container.id = 'test';
        this.container.className = this.className;
        this.container.textContent = this.text;
        return this.container;
    }
    onRemove(){
        this.container.parentNode.removeChild(this.container);
        this.map = undefined;
    }
}

When I console.log(document.getElementById('test')); I see the expected result in my console (the test div).

So what could be going on here?

Answer 1

To make sure that the click event is bind to the correct element, you can bind the event in the Class declaration instead.

Pass a callback for click event to the CustomControl

const clickCallback = function(e) {
  alert(test);
};

const currentLocationControl = new CustomControl(
  "current-location-control",
  "GPS",
  clickCallback
);

Class declaration:

// add clickCallback to constructor
export default class CustomControl {
  constructor(className, text, clickCallback) {
    //...
  }

  onAdd(map) {
    //...
    this.container.onclick = clickCallback;
    //...
  }
}

Answer 2

It might very well be the element does not yet exist, depending on how map.addControl works.

Perhaps if you created a method in your CustomControl to return the container, and instead of using document.getElementById you'd use something like currentLocationControl.getContainer() ?

Alternatively a setAction in your CustomControl like

setAction(action) {
    this.container.addEventListener('click', action);
}