What is a Short circuit condition

Short circuit conditions are meant for condensed way of writing simple if statements. Let's demonstrate the scenario using an example. If you would like to login to a portal with an authentication condition, the expression would be as below,

 if (authenticate) {
   loginToPorta();
 }

Since the javascript logical operators evaluated from left to right, the above expression can be simplified using && logical operator

 authenticate && loginToPorta();