JS in the | | And the use of &&

Unlike other languages, in JS, a&&b or a| | b returns either A or B, while the other language returns TRUE or False

For JS OR and operations, you need to convert the implicit conversion to the Boolean type and then the conversion rule is:

A&&b

If A is true, B is executed and the value of B is returned;

False if A is false, does not execute B;

a| | B

If A is true, returns the value of a without performing B;

If A is false, B is executed and the value of B is returned;

varA=3; varb= "Test"; varC={name: ' Test '}; varD={}; A|| B//= 3C | | B//= = {name: ' Test '}D | | B//= = {}true|| B//= Truefalse|| B//= ' Test 'NaN | | B//= ' Test '"| | B//= ' Test 'a&& b//= ' Test 'C && B//= ' Test 'D && B//= ' Test 'true&& b//= ' Test 'false&& b//= FasleNaN && b//= NaN' && b//= ""

JS in the | | And the use of &&