Undefined variable as function argument javascript

Question

I\'ve looked a fair bit, so pardon me if this has already been answered.

I\'m also curious as to what the actual term is called; Is it \"Ambiguous\" for the type of argu

Answer 1

Basically, so that variables can have default values.

Why don't you just initialize the variable with a default value?

Or, just initialise the variable before calling defined.

var variable; // Note that this will not overwrite the variable if it is already set.

Or, even better.

var variable = variable || 'default';