Script to activate or mute effects and layers from multiple pre-comp

[Meng Zhiqun]

For a simple way to turn on/off effects of a nested comp, you can use this after selecting that comp in your mastercomp.

var proj = app.project;
var projComp = app.project.activeItem;
var selLay = projComp.selectedLayers;
var foundFx = 0;
for(var i = 0; i <= selLay.length-1; i++){
    var curLay = selLay[i];
    curLay.selected = false;
    if(curLay.source.typeName == "Composition"){
        var curSNumLay = curLay.source.numLayers;
        for(var ci = 1; ci <= curSNumLay; ci++){
            var curSLay = curLay.source.layer(ci);
            if(curSLay.effectsActive == true){
                foundFx = 1;
                break;
            }
        }
        if(foundFx == 1){
            for(var ci1 = 1; ci1 <= curSNumLay; ci1++){
                var curSLay = curLay.source.layer(ci1);
                curSLay.effectsActive = false;
            }
        }else{
            for(var ci1 = 1; ci1 <= curSNumLay; ci1++){
                var curSLay = curLay.source.layer(ci1);
                curSLay.effectsActive = true;
            }
        }
    }
}

However, this turns All effects on all layers off and on. To keep a history of which layers in which comp has effects turned off/on before switching them, you can write a tmp text file to read later. Hope this helps!