Auto Fade Opacity - After Effects Expression by Animoplex

AutoFadeOpacity.jsx

// Auto Fade Opacity - Created by Animoplex: www.animoplex.com
// Automatically fades a layer in and out based on the inPoint and outPoint of the layer.
// Full Tutorial: https://www.youtube.com/watch?v=BOPfs49VfLE&t=188s

fade = 1; // fade duration in seconds
fadeIn = (time - inPoint) / fade;
fadeOut = (outPoint - time) / fade;
if (time < inPoint + fade) {
    ease(fadeIn, 0, 1) * value;
} else if (time > outPoint - fade) {
    ease(fadeOut, 0, 1) * value;
} else {
    value;
}