Logical interrupt for JavaScript (short-circuit operation)

<! DOCTYPE html>//logical Interrupt (short-circuit operation)        //Logical OR: | |        //logic and: &&        //Logical OR:        //syntax: expression 1 | | expression 2        //if the value of the first expression is true: Returns the expression 1        //if the value of the first expression is false: Returns the expression 2        //Logic with:        //syntax: expression 1 && expression 2        //if the value of the first expression is true: Returns the expression 2        //if the value of the first expression is false: Returns the expression 1        //var b = 123 | | 456;        varb = 0 | | 55W;        Console.log (b); //Scenario: Parameter default values for a function        functionfn (NUM1) {//Console.log (NUM1);NUM1 = NUM1 | | 1; //if (num1!== 0) {            //num1 = 1;            // }Console.log (NUM1); }        //If the parameter is not worn, the value of num1: undefinedFN ();//0FN (123);//123        //Logic and        //var b = 123 && 456;        //var b = 0 && 456;        //Console.log (b);        //when you make a judgment,        //if (condition 1 && Condition 2 && condition 3)        //if (condition 1 | | Condition 2 | | Condition 3)        //</script></body>
Logical interrupt for JavaScript (short-circuit operation)