How to tell if Shift key is being held down

Question

I am making a first-person game using Babylon.js and I'm trying to add a feature where the player can sprint (camera.speed is increased) when holding SHIFT, but SHIFT doesn't trigger the keydown event, so I was wondering if there is a way to add this trigger, either with Babylon or just with Javascript.

Answer 1

I ended up figuring it out. What I had to do was create an action manager attached to the scene, then add a trigger for when the shift key was pressed. Here's the final code:

const scene.actionManager = new BABYLON.ActionManager(scene);
scene.actionManager.registerAction(
    new BABYLON.ExecuteCodeAction({
        trigger: BABYLON.ActionManager.OnKeyDownTrigger,
        parameter: 16 // key code for shift
        }, () => {
            camera.speed = 0.8;
        },
        new BABYLON.PredicateCondition(scene.actionManager, () => {return camera.speed === 0.3}) // checks to see if it's already changed so it isn't setting the value every frame
    )
);
        
this.scene.actionManager.registerAction(
    new BABYLON.ExecuteCodeAction({
        trigger: BABYLON.ActionManager.OnKeyUpTrigger,
        parameter: 16
    }, () => {
        camera.speed = 0.3;
    })
);

This would also work for CTRL, if you wanted to use it for crouch or some other function, you would just change parameter: 17.