Prototype Selector : simple examples

Question

i'm just starting prototype, i was on jquery before. I can't find easy examples on the internet about how : - Selecting all elements having the same id on a page (I'm doing this but it only works for the first element : `$('mydiv').hide()` ) - Selecting a div that is contained in another div by their id. - hiding all elements that have myClass class.

Accepted Answer

As mentioned above you shouldn't have the same ID on a page more then once. Besides being against standards it's a recipe for potential problems since you don't know how your JavaScript will react to it. Uses classes instead.

Selecting all elements having the same id class on a page (i'm doing this but it only works for the first element : $('mydiv').hide() )

Use `$$`:

```
$$('.myclass')
```

Selecting a div that is contained in another div by their id.

Use `$$`:

```
$$('div#outer div#inner')
```

hiding all elements that have myClass class.

Use `$$`, `each()`, and `hide()`

```
$$('.myClass').each(function(d) {
  d.hide();
});
```

`$$` is your friend.

Prototype Selector : simple examples

Solution

Problem