Javascript operator !==

What is the difference between the !== operator and the != operator. Does it behave similar to the === operator where it compares both value and the type?

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Yes, it's the same operator like === , just for inequality:

!== - returns true if the two operands are not identical. This operator will not convert the operands types, and only returns false if they are the same type and value. —Wikibooks

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是， !==是!=运算符的严格版本，如果操作数的类型不同，则不会执行类型强制：

0 != ''            // false, type coercion made
0 != '0'           // false
false != '0'       // false

0 !== ''           // true, no type coercion
0 !== '0'          // true
false !== '0'      // true

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I was about to post this w3schools page, but funnily enough it didn't contain this operator!

At least, the !== is indeed the inverse of === which tests the equality of both type and value.

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