MineXLauncher/src/resources/addons/blur.js

(() => {
    ModAPI.require("settings");
    var oldFPS = 260;
    function fcs(){
        if(ModAPI.settings != null){
            if(ModAPI.settings.limitFramerate != null){
                ModAPI.settings.limitFramerate = oldFPS;
                ModAPI.settings.reload();
            }
        }
    }
    
    function blr(){
        if(ModAPI.settings != null){
            if(ModAPI.settings.limitFramerate != null){
                oldFPS = ModAPI.settings.limitFramerate;
                ModAPI.settings.limitFramerate = 5;
                ModAPI.settings.reload();
            }
        }
    }
    
    addEventListener("focus",fcs);
    addEventListener("blur",blr);
})();