Comparison of JavaScript = =,! =, = =,!===

1 varnum =1;2  3 varstr ='1';4  5 varTest =1;6  7Test = = num//true same type same value8  9Test = = num//true same type same valueTen   OneTest!== num//false test is the same as NUM type, its value is the same, non-operation is definitely false A   -   -num = = str//true to convert Str to a number to check if it is equal.  the   -Num! = str//false = = Non-arithmetic -   -num = = str//false with different type, direct return false +   -Num!== str//true num differs from the STR type in that it means that the non-unequal operation is true.

= = and! = Compare if the type is different, the first test conversion type, then the value comparison, the final return value comparison results. = = = and!== values are compared only under the same type.

Comparison of JavaScript = =,! =, = =,!===