In JavaScript, what is the easiest alternative to set Timeout(fn, 0)?

For example, consider the behavior of

(function() {

console.log('this is the start');

setTimeout(function cb() {

console.log('Callback 1: this is a msg from call back');

}); // has a default time value of 0

console.log('this is just a message');

setTimeout(function cb1() {

console.log('Callback 2: this is a msg from call back');

}, 0);

console.log('this is the end');

})();

// "this is the start"

// "this is just a message"

// "this is the end"

// "Callback 1: this is a msg from call back"

// "Callback 2: this is a msg from call back"

What are some alternatives which would still allow everything in the queue to finish before fn?