logical operators in JS &&, | |, bitwise OPERATORS |,&

1, js in the | | Symbol:

Method of Operation:

As long as "| |" False in front, regardless of "| |" Followed by true or FALSE, return "| |" The value that follows.

As long as "| |" Preceded by true, regardless of "| |" Followed by true or FALSE, return "| |" The preceding value.

Summary: After the true pre-leave

2, JS in the && symbol:

Method of Operation:

As long as "&&" is preceded by false, whether "&&" is followed by true or false, the result will be returned to the value preceding "&&";

As long as "&&" is preceded by true, whether "&&" is followed by true or false, the result will be returned to the value after "&&";

Summary: Fake before really after

Understand the above said should also know:

JS 6 eggs: In the JS logic operation, 0, "", null, False, undefined, Nan will be sentenced to false, the other is true.

Give me a chestnut:

3, bitwise operators: |

Method of Operation:

Two bits as long as there is a 1, then the result is 1. Otherwise, it would be 0.

Continue to raise chestnuts

| Operators can also perform rounding operations

4, bitwise operator:&

Method of Operation:

The number of two digits is the same as, at the same time, 1 is 1, as long as a 0 is 0.

or raise chestnuts:

logical operators in JS &&, | |, bitwise OPERATORS |,&