When it comes to the javascript void
statement, it is designed to evaluate an expression and yield the value of undefined
. The concept behind this functionality stems from the fact that the global variable undefined
can be altered. However, one might wonder why an expression needs to be evaluated at all. Interestingly, many individuals simply utilize 0 in their code, such as in the examples below:
void 0;
void(0);
In exploring Raghu's response, it becomes evident that according to the documentation, the purpose of this operator is to enable the integration of expressions with side effects into scenarios where a result of undefined is required.
This operator facilitates the inclusion of expressions that trigger side effects within contexts necessitating the evaluation of values resulting in undefined.
The question arises - are there instances wherein placing void(0)
in the exact location requiring an outcome of undefined proves insufficient? Could there be situations demanding the assessment of expressions with side effects on separate lines instead?