The dropdown menu is malfunctioning

Currently, I am in the process of creating a simple web application that involves the use of two JavaScript libraries, dat.gui, and three.js.

One issue that I am encountering is that the drop-down menu appears to be locked and I am unable to access it.

// initialization of gui (dat.gui)
function initGui() {

    var Options = function() {
        this.tenda = 'bar';
    };

    config = new Options();
    var gui = new dat.GUI();
    var subGui = gui.addFolder('Setting');
    subGui.open();

    // callbacks
    subGui.add( config, 'tenda', ['bar', 'pie', 'area']).
        onChange(
            function() {
                if (config.tenda === 'bar') { ... }
                else if (config.tenda === 'pie') { ... }
                else if (config.tenda === 'area') { ... }
            }
        );
};

After researching online, it appears that this is a known issue, although I have come across some examples where the drop-down menus are functioning correctly. As I am relatively new to JavaScript, I considered the possibility of a scoping issue and attempted to resolve it by encapsulating the initialization process within a function. Despite this, the problem persists.

I am using Ubuntu/Chrome and Ubuntu/Firefox for development. You can view the complete code here, where I have implemented checkboxes instead of a drop-down menu.

Answer №1

Dealing with a similar issue here. I made a modification in my code:

var controls = new THREE.OrbitControls(camera);

and updated it to:

var controls = new THREE.OrbitControls(camera, renderer.domElement);

Answer №2

I encountered a similar issue. In my script, I am monitoring the mouse click event and the callback function is structured like this:

function onMouseClick( event ) {
    event.stopPropagation();

    ... //additional code
}

After investigation, I discovered that the culprit was "event.stopPropagation();", which was preventing the dropdown list from being clickable. By simply commenting out this line, the issue was resolved. It may be worth checking other functions that involve the mouse click event as well.

Answer №3

I found a solution to my problem by ensuring that preventDefault is only triggered for mouse events originating from the drawing canvas. This resolved the issue I was facing, particularly in the context of utilizing Three.js, OrbitControls, and a raycaster for selection upon mouse click.

function handleMouseDown(event) {
  // Ensures preventDefault is only called for mouse events on the canvas
  var target = event.target || event.srcElement;
  var tag = target.tagName;
  if (tag != 'CANVAS')
    return;
  event.preventDefault();

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