Toggle a boolean in javascript

Is there a really easy way to toggle a boolean value in javascript ?

So far, the best I've got outside of writing a custom function is the ternary:

bool = bool ? false : true;

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bool = !bool;

这在大多数语言中都适用。

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If you don't mind the boolean being converted to a number (that is either 0 or 1), you can use the Bitwise XOR Assignment Operator. Like so:

bool ^= true;   //- toggle value.

This is especially good if you use long, descriptive boolean names, EG:

var inDynamicEditMode   = true;     // Value is: true (boolean)
inDynamicEditMode      ^= true;     // Value is: 0 (number)
inDynamicEditMode      ^= true;     // Value is: 1 (number)
inDynamicEditMode      ^= true;     // Value is: 0 (number)

This is easier for me to scan than repeating the variable in each line.

This method works in all (major) browsers (and most programming languages).

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bool = bool != true;

其中一例。

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