# Tag Helpers

Tag helpers are the basic building blocks used to construct html 'tags' within a
view template. There are three major functions for this category: `tag`,
`content_tag` and `input_tag`.

The `tag` and `content_tag` are for building arbitrary html tags with a name and
specified options. If the tag contains 'content' within then `content_tag` is
used. For example:

```erb
tag(:br, style: 'clear:both') # => <br style="clear:both" />
content_tag(:p, 'demo', class: 'light') # => <p class="light">demo</p>
```

The `input_tag` is used to build tags that are related to accepting input from
the user:

```erb
input_tag :text, class: 'demo' # => <input type="text" class="demo" />
input_tag :password, value: 'secret', class: 'demo'
```

Note that all of these accept html options and result in returning a string
containing html tags.

## List of Tag Helpers

- `tag(name, options = nil, open = false)`
  - Creates an html tag with the given name and options
  - `tag(:br, style: 'clear:both', open: true)` => `<br
    style="clear:both">`
- `content_tag(name, content, options = nil, &block)`
  - Creates an html tag with given name, content and options
  - `content_tag(:p, 'demo', class: 'light')` => `<p class="light">demo</p>`
  - `content_tag(:p, class: 'dark') { ...content... }` => `<p
    class="dark">...content...</p>`
- `input_tag(type, options = {})`
  - Creates an html input field with given type and options
  - `input_tag :text,     class: 'demo'`
  - `input_tag :password, value: 'secret', class: 'demo'`