Introduction to void operator syntax and usage in javascript_javascript skills

void is an operator in JavaScript, the syntax is as follows:
javascript:void(expression)
javascript:void expression
void will calculate the value of the expression, but discard the return value of the expression.
This expression is often used to make a link a dead link:

Copy code The code is as follows:

Click me

When this link is clicked, The address jump will not occur, but the onclick function will be executed.
The following method can also achieve the same result

Copy the code The code is as follows:

Click me

But "#" contains a location information, the default is Return to the top of the web page, so in order to avoid this situation, you can add a return false statement to the onclick statement