Encountering issues with Mouse Handler functionality after incorporating AngularJS

In my code, I have a function that takes a canvas element as a parameter:

function addMouseHandler(canvas) {
    console.log(canvas); //logging the canvas element
    canvas.addEventListener('mousemove', function (e) {
        onMouseMove(e);
    }, false);
    canvas.addEventListener('mousedown', function (e) {
        console.log('here'); //testing the event listener
        onMouseDown(e);
    }, false);
    canvas.addEventListener('mouseup', function (e) {
        onMouseUp(e);
    }, false);
}

Everything works perfectly without AngularJS. However, once I add AngularJS to my code, the code no longer triggers any of the addEventListener() methods.

Although the first console.log() still displays the canvas element correctly:

<canvas width="945" height="550" id="mycanvas"></canvas>

The addEventListener() methods are never entered. I confirmed this by checking if 'here' was logged, but it never is.

Update: The issue started when I added ng-app="myApp" to the body element like this <body ng-app="myApp">. No other AngularJS code is present.

Answer №1

Aha! Problem solved. It turns out I accidentally declared the controller twice - once in ng-controller and again in myApp.controller(). As a result, my canvas was being created twice and messing with the mouse listeners.

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