餐厅练习：

CSS Diner

通过条件：通过选择器选中晃动的物体

第1关：Type Selector

Select elements by their type


A


Selects all elements of type A. Type refers to the type of tag, so

<div>

,

<p>

and

<ul>

are all different element types.


Examples



<div>

selects all div elements.


<p>

selects all p elements.

参考答案：

plate

第2关：Type Selector

Select elements by their type


A


Selects all elements of type A. Type refers to the type of tag, so

<div>

,

<p>

and

<ul>

are all different element types.


Examples



div

selects all div elements.


<p>

selects all p elements.

参考答案：

bento

第3关：ID Selector

Select elements with an ID


#id


Selects the element with a specific id. You can also combine the ID selector with the type selector.


Examples



#cool

selects any element with

id="cool"



ul#long

selects

<ul id="long">


参考答案：

#fancy

第4关：Descendant Selector

Select an element inside another element


A B


Selects all B inside of A. B is called a descendant because it is inside of another element.


Examples



p strong

selects all

<strong>

elements that are inside of any

<p>



#fancy span

selects any

<span>

elements that are inside of the element with

id="fancy"


参考答案：

plate > apple

第5关：Combine the Descendant & ID Selectors

#id A

You can combine any selector with the descendent selector.


Examples



#cool span

selects all

<span>

elements that are inside of elements with

id="cool"


参考答案：

#fancy > pickle

第6关：Class Selector

Select elements by their class


.classname


The class selector selects all elements with that class attribute. Elements can only have one ID, but many classes.


Examples



.neato

selects all elements with

class="neato"


参考答案：

.small

第7关：Combine the Class Selector


A.className


You can combine the class selector with other selectors, like the type selector.


Examples



ul.important

selects all

<ul >

elements that have

class="important"



#big.wide

selects all elements with

id="big"

that also have

class="wide"


参考答案：

orange.small

第8关：子元素选择器+交集选择器

注意点：

交集选择器中如果有元素选择器，必须使用元素选择器开头

父元素
	- 直接包含子元素的元素叫做父元素
子元素
    - 直接被父元素包含的元素是子元素
祖先元素
    - 直接或间接包含后代元素的元素叫做祖先元素
    - 一个元素的父元素也是它的祖先元素
后代元素
    - 直接或间接被祖先元素包含的元素叫做后代元素
    - 子元素也是后代元素
兄弟元素
    - 拥有相同父元素的元素是兄弟元素

参考答案：

bento > orange.small

第9关：Comma Combinator

Combine, selectors, with… commas!


A, B


Thanks to Shatner technology, this selects all

A

and

B

elements. You can combine any selectors this way, and you can specify more than two.


Examples



p, .fun

selects all

<p>

elements as well as all elements with

class="fun"



a, p, div

selects all

<a>

,

< p>

and

<div >

elements

参考答案：

plate,bento

第10关：The Universal Selector

You can select everything!


*


You can select all elements with the universal selector!


Examples



p *

selects any element inside all

<p>

elements.

参考答案：

*

第11关：Combine the Universal Selector


A *


This selects all elements inside of

A



Examples



p *

selects every element inside all

<p>

elements.


ul.fancy *

selects every element inside all

<ul class="fancy" >

elements.

参考答案：

plate *
plate>apple,pickle,orange

第12关：Adjacent Sibling Selector

Select an element that directly follows another element


A + B


This selects all

B

elements that directly follow

A

. Elements that follow one another are called siblings. They’re on the same level, or depth.

In the HTML markup for this level, elements that have the same indentation are siblings.


Examples



p + .intro

selects every element with

class="intro"

that directly follows a

<p>



div + a

selects every a element that directly follows a

<div>


参考答案：

plate + apple

第13关：General Sibling Selector

Select elements that follows another element


A ~ B


You can select all siblings of an element that follow it. This is like the Adjacent Selector

(A + B)

except it gets all of the following elements instead of one.


Examples



A ~ B

selects all

B

that follow a

A


参考答案：

bento ~ pickle

第14关：Child Selector

Select direct children of an element


A > B


You can select elements that are direct children of other elements.

A

child element is any element that is nested directly in another element.

Elements that are nested deeper than that are called descendant elements.


Examples



A > B

selects all

B

that are a direct children

A



参考答案：

plate > apple

第15关：First Child Pseudo-selector

Select a first child element inside of another element


:first-child


You can select the first child element. A child element is any element that is directly nested in another element. You can combine this pseudo-selector with other selectors.


Examples



:first-child

selects all first child elements.


p:first-child

selects all first child

<p>

elements.


div p:first-child

selects all first child

<p>

elements that are in a

<div>

.


参考答案：

plate orange:first-child

第16关：Only Child Pseudo-selector

Select an element that are the only element inside of another one.


:only-child


You can select any element that is the only element inside of another one.

参考答案：

plate apple:only-child,plate pickle:only-child

第17关：Last Child Pseudo-selector

Select the last element inside of another element


:last-child


You can use this selector to select an element that is the last child element inside of another element.

Pro Tip → In cases where there is only one element, that element counts as the first-child, only-child and last-child!


Examples



:last-child

selects all last-child elements.


span:last-child

selects all last-child span elements.


ul li:last-child

selects the last

<li>

elements inside of any

<ul>

.

参考答案：

apple:last-child,pickle:last-child
apple,pickle

第18关：Nth Child Pseudo-selector

Select an element by its order in another element


:nth-child(A)


Selects the nth (Ex: 1st, 3rd, 12th etc.) child element in another element.


Examples



:nth-child(8)

selects every element that is the 8th child of another element.


div p:nth-child(2)

selects the second p in every

<div>


参考答案：

plate:nth-child(3)

第19关：Nth Last Child Selector

Select an element by its order in another element, counting from the back


:nth-last-child(A)


Selects the children from the bottom of the parent. This is like nth-child, but counting from the back!


Examples



:nth-last-child(2)

selects all second-to-last child elements.

参考答案：

bento:nth-last-child(3)

第20关：First of Type Selector

Select the first element of a specific type


:first-of-type


Selects the first element of that type within another element.


Examples



span:first-of-type

selects the first span in any element.

参考答案：

apple:first-of-type

第21关：Nth of Type Selector


:nth-of-type(A)


Selects a specific element based on its type and order in another element – or even or odd instances of that element.


Examples



div:nth-of-type(2)

selects the second instance of a

<div>

.


.example:nth-of-type(odd)

selects all odd instances of a the example class.

参考答案：

plate:nth-of-type(2n)

第22关：Nth-of-type Selector with Formula


:nth-of-type(An+B)


The nth-of-type formula selects every nth element, starting the count at a specific instance of that element.


Examples



span:nth-of-type(6n+2)

selects every 6th instance of a

<span>

, starting from (and including) the second instance.

参考答案：

plate:nth-of-type(2n+3)

第23关：Only of Type Selector

Select elements that are the only ones of their type within of their parent element


:only-of-type


Selects the only element of its type within another element.


Examples



<p>

span:only-of-type selects a span within any

<p>

if it is the only

<span>

in there.

参考答案：

apple:only-of-type

第24关：Last of Type Selector

Select the last element of a specific type


:last-of-type


Selects each last element of that type within another element. Remember type refers the kind of tag, so

<p>

and span are different types.

I wonder if this is how the last dinosaur was selected before it went extinct.


Examples



div:last-of-type

selects the last

div in every element.



span:last-of-type selects the last span in every


`.

参考答案：

orange:last-of-type,apple:last-of-type

第25关：Empty Selector

Select elements that don’t have children


:empty


Selects elements that don’t have any other elements inside of them.


Examples



div:empty

selects all empty

<div>

elements.

参考答案：

bento:empty

第26关：Negation Pseudo-class

Select all elements that don’t match the negation selector


:not(X)


You can use this to select all elements that do not match selector

"X"

.


Examples


:not(#fancy) selects all elements that do not have

id="fancy"

.


div:not(:first-child)

selects every

<div>

that is not a first child.


:not(.big, .medium)

selects all elements that do not have

class="big"

or

class="medium"

.

参考答案：

apple:not(.small)

第27关：Attribute Selector

Select all elements that have a specific attribute


[attribute]


Attributes appear inside the opening tag of an element, like this: span attribute=“value”. An attribute does not always have a value, it can be blank!


Examples



a[href]

selects all a elements that have a

href="anything"

attribute.


[type]

selects all elements that have a

type="anything"

. attribute

参考答案：

apple[for],bento[for],plate[for]

第28关：Attribute Selector

Select all elements that have a specific attribute


A[attribute]


Combine the attribute selector with another selector (like the tag name selector) by adding it to the end.


Examples



[value]

selects all elements that have a

value="anything"

attribute.


a[href]

selects all a elements that have a

href="anything"

attribute.


input[disabled]

selects all input elements with the disabled attribute

参考答案：

plate[for]

第29关：Attribute Value Selector

Select all elements that have a specific attribute value


[attribute="value"]


Attribute selectors are case sensitive, each character must match exactly.


Examples



input[type="checkbox"]

selects all checkbox input elements.

参考答案：

bento[for="Vitaly"]

第30关：Attribute Starts With Selector

Select all elements with an attribute value that starts with specific characters


[attribute^="value"]



Examples



.toy[category^="Swim"]

selects elements with class toy and either

category="Swimwear

or

category="Swimming"

.

参考答案：

[for^='S']

第31关：Attribute Ends With Selector

Select all elements with an attribute value that ends with specific characters


[attribute$="value"]



Examples



img[src$=".jpg"]

selects all images display a

.jpg

image.

参考答案：

[for$=o]

第32关：Attribute Wildcard Selector

Select all elements with an attribute value that contains specific characters anywhere


[attribute*="value"]


A useful selector if you can identify a common pattern in things like class, href or src attributes.


Examples



img[src*="/thumbnails/"]

selects all image elements that show images from the

"thumbnails"

folder.


[class*="heading"]

selects all elements with

"heading"

in their class, like

class="main-heading"

and

class="sub-heading"

.

参考答案：

[for*='bb']