Detect ScrollView has reached the end

Question

I have a Text with long text inside a ScrollView and I want to detect when the user has scrolled to the end of the text so I can enable a button.

Answer 1

@Henrik R's right. But you should use Math.ceil() too.

function handleInfinityScroll(event) {
        let mHeight = event.nativeEvent.layoutMeasurement.height;
        let cSize = event.nativeEvent.contentSize.height;
        let Y = event.nativeEvent.contentOffset.y;

        if(Math.ceil(mHeight + Y) >= cSize) return true;
        return false;
}