set default values for parameters js code example
Example 1: javascript default function parameter value
function multiply(a, b) {
b = (typeof b !== 'undefined') ? b : 1
return a * b
}
Example 2: javascript parameter default parameter
function say(message='Hi') {
console.log(message);
}
say();
say(undefined);
say('Hello');
function date(d = today()) {
console.log(d);
}
function today() {
return (new Date()).toLocaleDateString("en-US");
}
date();
function add(x = 1, y = x, z = x + y) {
return x + y + z;
}
console.log(add());