function parameters

1function createMenu({ title, body, buttonText, cancellable }) {
2  // ...
3}
4
5createMenu({
6  title: "Foo",
7  body: "Bar",
8  buttonText: "Baz",
9  cancellable: true
10});
11

1function sum(...values) {
2    console.log(values);
3}
4sum(1);
5sum(1, 2);
6sum(1, 2, 3);
7sum(1, 2, 3, 4);
8
9
10function sum(...values) {
11    let sum = 0;
12    for (let i = 0; i < values.length; i++) {
13        sum += values[i];
14    }
15  
16    return sum;
17}
18console.log(sum(1)); //1
19console.log(sum(1, 2)); //3
20console.log(sum(1, 2, 3)); // 5
21console.log(sum(1, 2, 3, 4)); //10

1const makeNoise = function() {
2  console.log("Pling!");
3};
4
5makeNoise();
6// → Pling!
7
8const power = function(base, exponent) {
9  let result = 1;
10  for (let count = 0; count < exponent; count++) {
11    result *= base;
12  }
13  return result;
14};
15
16console.log(power(2, 10));
17// → 1024

1
2function myFunction(x, y) {
3
4    if (y === undefined) {
5
6    y = 2;
7
8     }
9
10
11}
12 

1<button class="btn btn-primary" onclick="transmit({search: document.getElementById('search_id').value});">
2	<span class="glyphicon glyphicon-search"></span>
3</button>