javascript - Does a self-executing function execute the function when it is loaded into this js?

Question

(function() {
    'use strict';

    angular.module('app').controller('demoCtrl', demo);

    demo.$inject = [ '$location', 'demoSvc' ];

    function demo($location, demoSvc) {
        /* jshint validthis:true */
        var vm = this;
        vm.title = '';

        vm.showDialog = function() {

            $('.myDialog').modal({
                backdrop : 'static',
                keyboard : false
            });
        }

        function datetimePicker() {
            $("#datepicker").kendoDatePicker({
                culture : 'zh-CN'
            });
        }

        function upload() {
            $("#files").kendoUpload({
                async : {
                    saveUrl : "/demo/save",
                    removeUrl : "/demo/remove",
                    autoUpload : true
                }
            });
        }

        activate();
        function activate() {
            datetimePicker();
            upload();
        }
    }
})();

The code is as above. I would like to ask how it is loaded. Is the function inside already executed when it is loaded into this js?

Answer 1

(function(){
    //
})()

is equivalent to

var funcName = function(){
    ///
}
funcName();

is equivalent to

function funcName(){
    ///
}
funcName();

Is that so?

Answer 2

(function(){
    console.log(123)
})()

Self-executing function