How to change the value of a global variable in callbacks?

Question

Programming

....
 var idResource = 1;
 
$R('#content', {
  autosave: '/assets/tmp/redactor/add/autosave.php',
        autosaveData: {
            id: idResource,
            elements: '#pagetitle'
        },
  callbacks: {
     autosave: function(name, data, response)
         {
         idResource =  response;  // не меняется значение переменной  при повторном autosave . 
...

Answer 1

"else" always refers to the same branch. If you wrote "else" after the last branch, then the second branch will also apply to it.
When designing mutually exclusive options (for example, when a part cannot be both first-class and defective at the same time), it is recommended to use the following design:

if (clause1) {
  action1;
} else if (clause2) {
  action2;
} else {
 action3;
}

Answer 2

window.idResource =  response; 
console.log('window.idResource = ', window.idResource);