How does the identity operator in JavaScript work?

Question

为什么(9 > 8) === true导致“ true ”，而(10>9>8) === true导致“ false ”？

Answer 1

If we see both, the JavaScript executes from left to right. As we all know:

(9 > 8) === true

The above statement is indeed true. But what we need to know is, how JavaScript executes this. If we see how it gets executed, the execution steps are as below:

(10 > 9 > 8) === true
((10 > 9) > 8) === true
(true > 8) === true
(1 > 8) === true
false === true
false

Answer 2

Because:

10 > 9 > 8 === (true) > 8

Which is false. In truthy values, a true gets expressed as "1". Since true > 0 and false < 1 .

Answer 3

You should only have one comparative operator without using the AND(&&) or the OR(||) operators.

If you want (10>9>8) to resolve to true, you would format it like this:

(10 > 9 && 9 > 8)

this says "check 10 > 9, if that's true, check 9 > 8. If they're both true, return true"