Package org.jsoup.select

## Class Selector

- java.lang.Object
- - org.jsoup.select.Selector

    public class Selector
    extends java.lang.Object

CSS-like element selector, that finds elements matching a query.

## Selector syntax

A selector is a chain of simple selectors, separated by combinators. Selectors are case insensitive (including against elements, attributes, and attribute values).

The universal selector (*) is implicit when no element selector is supplied (i.e. `*.header` and `.header` is equivalent).

Pattern | Matches | Example
--- | --- | ---
`*` | any element | `*`
`tag` | elements with the given tag name | `div`
`*|E` | elements of type E in any namespace (including non-namespaced) | `*|name` finds `<fb:name>` and `<name>` elements
`ns|E` | elements of type E in the namespace ns | `fb|name` finds `<fb:name>` elements
`#id` | elements with attribute ID of "id" | `div#wrap`, `#logo`
`.class` | elements with a class name of "class" | `div.left`, `.result`
`[attr]` | elements with an attribute named "attr" (with any value) | `a[href]`, `[title]`
`[^attrPrefix]` | elements with an attribute name starting with "attrPrefix". Use to find elements with HTML5 datasets | `[^data-]`, `div[^data-]`
`[attr=val]` | elements with an attribute named "attr", and value equal to "val" | `img[width=500]`, `a[rel=nofollow]`
`[attr="val"]` | elements with an attribute named "attr", and value equal to "val" | `span[hello="Cleveland"][goodbye="Columbus"]`, `a[rel="nofollow"]`
`[attr^=valPrefix]` | elements with an attribute named "attr", and value starting with "valPrefix" | `a[href^=http:]`
`[attr$=valSuffix]` | elements with an attribute named "attr", and value ending with "valSuffix" | `img[src$=.png]`
`[attr*=valContaining]` | elements with an attribute named "attr", and value containing "valContaining" | `a[href*=/search/]`
`[attr~=regex]` | elements with an attribute named "attr", and value matching the regular expression | `img[src~=(?i)\\.(png|jpe?g)]`
| The above may be combined in any order | `div.header[title]`

### Combinators

`E F` | an F element descended from an E element | `div a`, `.logo h1`
`E > F` | an F direct child of E | `ol > li`
`E + F` | an F element immediately preceded by sibling E | `li + li`, `div.head + div`
`E ~ F` | an F element preceded by sibling E | `h1 ~ p`
`E, F, G` | all matching elements E, F, or G | `a[href], div, h3`

### Pseudo selectors

`:lt(n)` | elements whose sibling index is less than n | `td:lt(3)` finds the first 3 cells of each row
`:gt(n)` | elements whose sibling index is greater than n | `td:gt(1)` finds cells after skipping the first two
`:eq(n)` | elements whose sibling index is equal to n | `td:eq(0)` finds the first cell of each row
`:has(selector)` | elements that contains at least one element matching the selector | `div:has(p)` finds `div`s that contain `p` elements. `div:has(> a)` selects `div` elements that have at least one direct child `a` element.
`:not(selector)` | elements that do not match the selector. See also `Elements.not(String)` | `div:not(.logo)` finds all divs that do not have the "logo" class. `div:not(:has(div))` finds divs that do not contain divs.

`:contains(text)`

elements that contains the specified text. The search is case insensitive. The text may appear in the found element, or any of its descendants. The text is whitespace normalized.

To find content that includes parentheses, escape those with a `\`.

`p:contains(jsoup)` finds p elements containing the text "jsoup".

`p:contains(hello \(there\) finds p elements containing the text "Hello (There)"`

`:containsOwn(text)` | elements that directly contain the specified text. The search is case insensitive. The text must appear in the found element, not any of its descendants. | `p:containsOwn(jsoup)` finds p elements with own text "jsoup".
`:containsData(data)` | elements that contains the specified data. The contents of `script` and `style` elements, and `comment` nodes (etc) are considered data nodes, not text nodes. The search is case insensitive. The data may appear in the found element, or any of its descendants. | `script:contains(jsoup)` finds script elements containing the data "jsoup".
`:matches(regex)` | elements containing whitespace normalized text that matches the specified regular expression. The text may appear in the found element, or any of its descendants. | `td:matches(\\d+)` finds table cells containing digits. `div:matches((?i)login)` finds divs containing the text, case insensitively.
`:matchesOwn(regex)` | elements whose own text matches the specified regular expression. The text must appear in the found element, not any of its descendants. | `td:matchesOwn(\\d+)` finds table cells directly containing digits. `div:matchesOwn((?i)login)` finds divs containing the text, case insensitively.
| The above may be combined in any order and with other selectors | `.light:contains(name):eq(0)`
`:matchText` | treats text nodes as elements, and so allows you to match against and select text nodes. Note that using this selector will modify the DOM, so you may want to `clone` your document before using. | `p:matchText:firstChild` with input `<p>One<br />Two</p>` will return one `PseudoTextElement` with text "`One`".

### Structural pseudo selectors

`:root` | The element that is the root of the document. In HTML, this is the `html` element | `:root`

`:nth-child(an+b)`

elements that have `an+b-1` siblings before it in the document tree, for any positive integer or zero value of `n`, and has a parent element. For values of `a` and `b` greater than zero, this effectively divides the element's children into groups of a elements (the last group taking the remainder), and selecting the bth element of each group. For example, this allows the selectors to address every other row in a table, and could be used to alternate the color of paragraph text in a cycle of four. The `a` and `b` values must be integers (positive, negative, or zero). The index of the first child of an element is 1.

In addition to this, `:nth-child()` can take `odd` and `even` as arguments instead. `odd` has the same signification as `2n+1`, and `even` has the same signification as `2n`.

`tr:nth-child(2n+1)` finds every odd row of a table. `:nth-child(10n-1)` the 9th, 19th, 29th, etc, element. `li:nth-child(5)` the 5h li

`:nth-last-child(an+b)` | elements that have `an+b-1` siblings after it in the document tree. Otherwise like `:nth-child()` | `tr:nth-last-child(-n+2)` the last two rows of a table
`:nth-of-type(an+b)` | pseudo-class notation represents an element that has `an+b-1` siblings with the same expanded element name before it in the document tree, for any zero or positive integer value of n, and has a parent element | `img:nth-of-type(2n+1)`
`:nth-last-of-type(an+b)` | pseudo-class notation represents an element that has `an+b-1` siblings with the same expanded element name after it in the document tree, for any zero or positive integer value of n, and has a parent element | `img:nth-last-of-type(2n+1)`
`:first-child` | elements that are the first child of some other element. | `div > p:first-child`
`:last-child` | elements that are the last child of some other element. | `ol > li:last-child`
`:first-of-type` | elements that are the first sibling of its type in the list of children of its parent element | `dl dt:first-of-type`
`:last-of-type` | elements that are the last sibling of its type in the list of children of its parent element | `tr > td:last-of-type`
`:only-child` | elements that have a parent element and whose parent element have no other element children |
`:only-of-type` | an element that has a parent element and whose parent element has no other element children with the same expanded element name |
`:empty` | elements that have no children at all |

A word on using regular expressions in these selectors: depending on the content of the regex, you will need to quote the pattern using `Pattern.quote("regex")` for it to parse correclty through both the selector parser and the regex parser. E.g. `String query = "div:matches(" + Pattern.quote(regex) + ");"`.

Author:
  Jonathan Hedley, jonathan@hedley.net
See Also:
  `Element.select(String)`

### Nested Class Summary

Nested Classes
`static class` `Selector.SelectorParseException`

### Method Summary

All Methods Static Methods Concrete Methods
`static Elements` `select​(java.lang.String query, java.lang.Iterable<Element> roots)` Find elements matching selector.
`static Elements` `select​(java.lang.String query, Element root)` Find elements matching selector.
`static Elements` `select​(Evaluator evaluator, Element root)` Find elements matching selector.
`static Element` `selectFirst​(java.lang.String cssQuery, Element root)` Find the first element that matches the query.

### Methods inherited from class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

### Method Detail

#### select

    public static Elements select​(java.lang.String query,
                                  Element root)

Find elements matching selector.

Parameters:
  `query` - CSS selector
  `root` - root element to descend into
Returns:
  matching elements, empty if none
Throws:
  `Selector.SelectorParseException` - (unchecked) on an invalid CSS query.

#### select

    public static Elements select​(Evaluator evaluator,
                                  Element root)

Find elements matching selector.

Parameters:
  `evaluator` - CSS selector
  `root` - root element to descend into
Returns:
  matching elements, empty if none

#### select

    public static Elements select​(java.lang.String query,
                                  java.lang.Iterable<Element> roots)

Find elements matching selector.

Parameters:
  `query` - CSS selector
  `roots` - root elements to descend into
Returns:
  matching elements, empty if none

#### selectFirst

    @Nullable
    public static Element selectFirst​(java.lang.String cssQuery,
                                      Element root)

Find the first element that matches the query.

Parameters:
  `cssQuery` - CSS selector
  `root` - root element to descend into
Returns:
  the matching element, or null if none.