How to Use the JavaScript Void 0 Command?

The JavaScript void operator is a unary operator that takes an expression as an operand and returns undefined. The expression void 0 is used to obtain the value of undefined, which is a value that represents the absence of any value.

Here is an example of how to use the void 0 command:

<button onclick="console.log(void 0)">Click me</button>

In the example above, when the button is clicked, the console.log(void 0) statement is executed, which logs the value of undefined to the console.

Note that the void operator and the expression void 0 are not commonly used in modern JavaScript programming, and there are often simpler and more straightforward alternatives for obtaining the value of undefined.