# Events

During the parsing, **LagartoParser** calls various callback methods of provided `TagVisitor` implementation.

### `start()` & `end()`

Invoked before and after the content is parsed.

### `text(CharSequence)`

Callback invoked on a block of plain text.

{% hint style="info" %}
Note that `text()` is called for **all** text blocks, including the whitespaces and indentations. 
{% endhint %}

### `comment(CharSequence)`

Invoked on an HTML comment. The argument contains the comment content, without the tag boundaries.

### `tag(Tag)`

Callback invoked foo all HTML tags: *open*, *close,* or an *empty* tag. The argument is a `Tag` instance, containing various information about the tag: tags name, attributes, depth level, etc.

{% hint style="warning" %}
`Tag` instance is **reused** during HTML parsing for better performances! The same `Tag`instance is passed to all callback methods and for every detected HTML tag. Do not store it internally!
{% endhint %}

### `script(Tag, CharSequence)`

Invoked on all `script` tags. The callback method receives the script Tag instance and the script body.

### `doctype(Doctype)`

Callback for the `doctype` tag.

### `xml()` and `cdata()`

These two callbacks are invoked for XML-specific tags when parsing the XML content.

### error(String)

Every error is reported by visiting this method. Depending on the configuration, the error message would contain the exact error position or not.