Discussion on: Enabling Dark Mode On Websites Based On Surrounding Light

[Ananya Neogi]

This is just plain JavaScript so it should work. Can you elaborate what error it is?
Maybe it's something specific to angular and not related to this particular bit of code.

[MsumanP-hexaware]

I am getting error like Property 'AmbientLightSensor' does not exist on type 'Window' & Cannot find name 'AmbientLightSensor'.

My Code:
if (window.AmbientLightSensor) {
const sensor = new AmbientLightSensor();
sensor.onreading = () => console.log(sensor.illuminance);
sensor.onerror = event => console.log(event.error.name, event.error.message);
sensor.start();
}

[Ananya Neogi]

You need to extend the existing Window interface to tell it about this new property.
So, before your class implementation add this code -

declare global {
    interface Window {
        AmbientLightSensor: any;
    }
}

Then you can add your AmbientLightSensor code in the following way -

        if (window.AmbientLightSensor) {
            const sensor = new window.AmbientLightSensor();
            sensor.onreading = () => console.log(sensor.illuminance);
            sensor.onerror = event => console.log(event.error.name, event.error.message);
            sensor.start();
        }

I hope this will solve your problem.

[MsumanP-hexaware]

Now error is not coming but window.AmbientLightSensor is coming as undefined.