Golang 网络爬虫框架gocolly/colly 二 jQuery selector

时间 2019-11-12

标签 golang 网络爬虫框架 gocolly colly jquery selector 栏目 Go 繁體版

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Golang 网络爬虫框架gocolly/colly 二 jQuery selector

colly框架依赖goquery库，goquery将jQuery的语法和特性引入到了go语言中。若是要灵活自如地采集数据，首先要了解jQuery选择器。如下内容是翻译jQuery官方网站css

Category: Selectors

Borrowing from CSS 1–3, and then adding its own, jQuery offers a powerful set of tools for matching a set of elements in a document.jquery

To use any of the meta-characters ( such as !"#$%&'()*+,./:;<=>?@[\]^`{|}~ ) as a literal part of a name, it must be escaped with with two backslashes: \\. For example, an element with id="foo.bar", can use the selector $("#foo\\.bar"). The W3C CSS specification contains the complete set of rules regarding valid CSS selectors. Also useful is the blog entry by Mathias Bynens on CSS character escape sequences for identifiers.git

类别：选择器github

从CSS 1-3借用，而后添加它本身的，jQuery提供了一套强大的工具来匹配文档中的一组元素。要使用任何元字符（如 !"#$%&'()*+,./:;<=>?@[\]^`{|}~ ）做为名称的文字部分，例如，一个id =“foo.bar”的元素能够使用选择符$("#foo\\.bar")。W3C CSS规范包含了关于有效的CSS选择器的完整规则。Mathias Bynens的关于标识符CSS字符转义序列的博文也是颇有用的。api

Also in: Selectors > Basic网络

**All Selector (“*”)**

Selects all elements.框架

Also in: Selectors > Basic Filter | Selectors > jQuery Extensionsless

选择所要元素ide

:animated Selector

Select all elements that are in the progress of an animation at the time the selector is run.

Also in: Selectors > Attribute

选择全部动画元素

Attribute Contains Prefix Selector [name|=”value”]

Selects elements that have the specified attribute with a value either equal to a given string or starting with that string followed by a hyphen (-).

Also in: Selectors > Attribute

属性包含前缀选择器 [name|=”value”]

选择具备指定属性的元素，其值等于给定的字符串，或者以该字符串开头，后跟连字符（ - ）。

**Attribute Contains Selector [name*=”value”]**

Selects elements that have the specified attribute with a value containing a given substring.

Also in: Selectors > Attribute

属性包含选择器 [name*=”value”]

选择具备指定属性的元素，其值包含给定子字符串。

Attribute Contains Word Selector [name~=”value”]

Selects elements that have the specified attribute with a value containing a given word, delimited by spaces.

Also in: Selectors > Attribute

属性包含字选择器[name~=”value”]

选择具备指定属性的元素，其值包含由空格分隔的给定单词。

Attribute Ends With Selector [name$=”value”]

Selects elements that have the specified attribute with a value ending exactly with a given string. The comparison is case sensitive.

Also in: Selectors > Attribute

属性结束选择器[name$=”value”]

选择具备指定属性的元素，其值以给定字符串结尾，精确匹配。比较区分大小写。

Attribute Equals Selector [name=”value”]

Selects elements that have the specified attribute with a value exactly equal to a certain value.

Also in: Selectors > Attribute | Selectors > jQuery Extensions

属性等于选择器[name=”value”]

选择具备指定属性的元素，其值刚好等于给定值。

Attribute Not Equal Selector [name!=”value”]

Select elements that either don’t have the specified attribute, or do have the specified attribute but not with a certain value.

Also in: Selectors > Attribute

属性不等于选择器[name!=”value”]

选择不具备指定属性的元素，或者具备指定属性但不具备特定值的元素。

Attribute Starts With Selector [name^=”value”]

Selects elements that have the specified attribute with a value beginning exactly with a given string.

Also in: Selectors > Form | Selectors > jQuery Extensions

属性以开始选择器[name^=”value”]

选择具备指定属性的元素，其值的开始部分与给定字符串彻底一致。

:button Selector

Selects all button elements and elements of type button.

Also in: Selectors > Form | Selectors > jQuery Extensions

按钮选择器

选择全部按钮元素和类型按钮的元素。

:checkbox Selector

Selects all elements of type checkbox.

Also in: Selectors > Form

复选框选择器

选择全部复选框

:checked Selector

Matches all elements that are checked or selected.

Also in: Selectors > Hierarchy

匹配全部选中的元素。

Child Selector (“parent > child”)

Selects all direct child elements specified by “child” of elements specified by “parent”.

Also in: Selectors > Basic

选择由“parent”指定元素的全部直接“child”指定子元素。

Class Selector (“.class”)

Selects all elements with the given class.

Also in: Selectors > Content Filter

选择指定类的全部元素。

:contains() Selector

Select all elements that contain the specified text.

Also in: Selectors > Hierarchy

选择包含指定文本的全部元素

Descendant Selector (“ancestor descendant”)

Selects all elements that are descendants of a given ancestor.

Also in: Selectors > Form

后代选择器 (“ancestor descendant”)

选择指定祖先的全部后代元素

:disabled Selector

Selects all elements that are disabled.

Also in: Selectors > Basic

选择全部被禁用的元素。

Element Selector (“element”)

Selects all elements with the given tag name.

Also in: Selectors > Content Filter

元素选择器

选择指定标签名的全部元素

:empty Selector

Select all elements that have no children (including text nodes).

Also in: Selectors > Form

空选择器

选择全部没有子项的元素（包括文本节点）

:enabled Selector

Selects all elements that are enabled.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择全部启用的元素

:eq() Selector

Select the element at index n within the matched set.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择匹配集中index =n的元素（下标从0开始）。

:even Selector

Selects even elements, zero-indexed. See also odd.

Also in: Selectors > Form | Selectors > jQuery Extensions

选择偶数元素，下标从0开始。

:file Selector

Selects all elements of type file.

Also in: Selectors > Child Filter

选择全部文件类型的元素

:first-child Selector

Selects all elements that are the first child of their parent.

Also in: Selectors > Child Filter

选择全部父节点的第一个孩子元素。

:first-of-type Selector

Selects all elements that are the first among siblings of the same element name.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择同一元素名称的全部兄弟节点中的第一个元素。

:first Selector

Selects the first matched DOM element.

Also in: Selectors > Basic Filter | Selectors > Form

选择第一个匹配的DOM元素。

:focus Selector

Selects element if it is currently focused.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择指定元素，当前处于获取焦点状态

:gt() Selector

Select all elements at an index greater than index within the matched set.

Also in: Selectors > Attribute

选择匹配集中全部索引大于指定index值的元素。

Has Attribute Selector [name]

Selects elements that have the specified attribute, with any value.

Also in: Selectors > Content Filter | Selectors > jQuery Extensions

选择具备指定属性的全部元素，能够是任何值。

:has() Selector

Selects elements which contain at least one element that matches the specified selector.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择指定元素，其包含至少一个元素匹配给定选择器。

:header Selector

Selects all elements that are headers, like h1, h2, h3 and so on.

Also in: Selectors > jQuery Extensions | Selectors > Visibility Filter

选择全部标题元素，例如h1,h2,h3等

:hidden Selector

Selects all elements that are hidden.

Also in: Selectors > Basic

选择全部隐藏的元素

ID Selector (“#id”)

Selects a single element with the given id attribute.

Also in: Selectors > Form | Selectors > jQuery Extensions

选择具备给定id属性的单个元素。

:image Selector

Selects all elements of type image.

Also in: Selectors > Form | Selectors > jQuery Extensions

选择全部image类型的元素

:input Selector

Selects all input, textarea, select and button elements.

Also in: Selectors > Basic Filter

选择全部input, textarea, select 和button元素。

:lang() Selector

Selects all elements of the specified language.

Also in: Selectors > Child Filter

选择全部指定语言的元素。

:last-child Selector

Selects all elements that are the last child of their parent.

Also in: Selectors > Child Filter

选择全部父元素的最后一个孩子节点元素。

:last-of-type Selector

Selects all elements that are the last among siblings of the same element name.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择同一元素名称的全部兄弟节点中的最后一个元素。

:last Selector

Selects the last matched element.

Also in: Selectors > Basic Filter | Selectors > jQuery Extensions

选择最后一个匹配的元素。

:lt() Selector

Select all elements at an index less than index within the matched set.

Also in: Selectors > Attribute

在匹配集中选择全部索引小于给定值的元素。

Multiple Attribute Selector [name=”value”][name2=”value2″]

Matches elements that match all of the specified attribute filters.

Also in: Selectors > Basic

多属性选择器

符合全部指定属性过滤器的匹配元素集。

Multiple Selector (“selector1, selector2, selectorN”)

Selects the combined results of all the specified selectors.

Also in: Selectors > Hierarchy

多重选择器

选择全部指定选择器的组合结果。

Next Adjacent Selector (“prev + next”)

Selects all next elements matching “next” that are immediately preceded by a sibling “prev”.

Also in: Selectors > Hierarchy

选择全部下一个匹配“next”的元素，紧接在兄弟“prev”以后。

Next Siblings Selector (“prev ~ siblings”)

Selects all sibling elements that follow after the “prev” element, have the same parent, and match the filtering “siblings” selector.

Also in: Selectors > Basic Filter

选择“prev”元素以后的全部同级元素，具备相同的父级，并匹配筛选“siblings”选择器。

:not() Selector

Selects all elements that do not match the given selector.

Also in: Selectors > Child Filter

选择不匹配给定选择器的全部元素。

:nth-child() Selector

Selects all elements that are the nth-child of their parent.

Also in: Selectors > Child Filter

选择全部父元素的第n个子元素。

:nth-last-child() Selector

Selects all elements that are the nth-child of their parent, counting from the last element to the first.

Also in: Selectors > Child Filter

选择全部父元素的第n个子元素，从后向前计数。

:nth-last-of-type() Selector

Selects all the elements that are the nth-child of their parent in relation to siblings with the same element name, counting from the last element to the first.

Also in: Selectors > Child Filter

选择父元素的具备相同指定元素名称的子元素中第n个元素，按照从后向前的顺序计数。