JavaScript short-circuit operation | | and &&

1, as long as "| |" False before, regardless of ' | | ' Followed by true or FALSE, the result returns "| |" The value that follows.

2, as long as "| |" Preceded by true, regardless of "| |" Followed by true or FALSE, the result returns "| |" The preceding value.

3, as long as "&&" is false, whether "&&" followed by true or false, the result will be "&&" the preceding value;

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

JavaScript short-circuit operation | | and &&