jquery Selector (iii) filter Selector

1. Basic Filter Selector

Selector	Describe	Return
: A	Select 1th Element	A single element
: Last	Select the last Element	A single element
: Not (selector)	Removes all elements that match a given selector	Collection elements
: Even	Select all elements of an even number index, starting at 0	Collection elements
Dd	Select the index is an odd number of all elements, the index starting from 0	Collection elements
: EQ (Index)	Select the element with index equal to index (index starting from 0)	A single element
: GT (Index)	Select an element with index greater than index (index starting from 0)	Collection elements
: LT (Index)	Select an element with index less than index (index starting from 1)	Collection elements
: Header	Select all the header elements, such as H1,H2,H3, and so on	Collection elements
: Animated	Select all elements that are currently executing the animation	Collection elements

2. Content Filter Selector
The filtering rules of content filter selector are mainly embodied in the resource Exchange or text content.

selector :contains (text) :has (selector) :p arent

description	return
set element
:empty
	collection element

3. Visibility Filter Selector
The Visibility filter selector is a more element-visible and invisible state to select the appropriate element.

Selector	Describe	Return
: Hidden	Select all elements that are not visible	Collection elements
: Visible	Select all visible elements	Collection elements

4. Attribute Filter Selector
The filter rule for the property filter selector is to get the corresponding element through the attributes of the element.

Selector	Describe	Return
[Attribute]	Select the element that owns this property	Collection elements
[Attribute=value]	Select the element of value for the property	Collection elements
[Attribute!=value]	To select an element of the property that is not equal to value	Collection elements
[Attribute^=value]	Select the element that the value of the property starts with	Collection elements
[Attribute$=value]	Select the element that ends the value of the property	Collection elements
[Attribute*=value]	Select the element with value for the property	Collection elements
[Selector1] [Selector2] [Selectorn]	The property selector is merged into a composite property selector that satisfies multiple conditions. Each time you choose, narrow the range	Collection elements

5. child element Filter Selector
The filtering rules of the child element filter selector are slightly more complex than the other selectors, but they are not related, as long as the element's parent and child elements are clearly differentiated, so it is easy to use.

:first -child :last-child

selector	description	back
:nth-child (index/even/odd/equation)		set element
	set element
	collection element
nly-child	If an element is the only child element in its parent element, it will be matched. If the parent element contains other elements, it will not be matched

6. Form Object Properties Filter Selector
Form object property Filter Selector Filters the selected form objects primarily.

Selector	Describe	Return
: Enabled	Select all available elements	Collection elements
:d isabled	Select all unavailable elements	Collection elements
: Checked	Select all selected elements (Radio box, check box)	Collection elements
: Selected	Select All selected option elements (drop down list)	Collection elements

There are many types of filter selectors, and there are some small differences in the rules used, you can try to remember their characteristics.