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Introduction to CSS block-level elements/inline elements, inheritance and related properties
- 一个新手Original
- 2017-09-23 10:06:241833browse
What are block-level elements?
Browsers usually display block-level elements using line breaks before and after the element. You can visualize this as a bunch of boxes.
Block-level elements always start on a new line and take up the full width available (expanding to the left and right as much as possible).
Usage: Block-level elements may only appear within the <body> element.
What are inline elements?
In HTML, an inline element is one that occupies only the space bounded by the tag that defines the element, rather than disrupting the flow of the content. In this article, we will examine HTML inline elements and how they differ from block-level elements.
Inline elements do not start on a new line and only take up the necessary width.
What is inheritance?
Inheritance in CSS is the mechanism for passing certain properties from a parent element to its child elements.
Personal understanding: What factors are passed down from the parents to their children by default. Example: If both parents have black hair, their children will inherit black hair by default. Unless the child wants to dye his hair gray, let's talk about it separately. If it's not the child of that parent, let's talk about it separately.
Not all CSS properties are inherited, as some of them are meaningless. For example, margins are not inherited because child elements are unlikely to need the same margins as their parent elements. In most cases, common sense will tell you which properties are inherited and which are not, but you do need to look at each property in the CSS 2.1 specification property summary table.
Attributes that can and cannot be inherited in CSS
1. Non-inheritable attributes
1. display: Specifies the type of box that the element should generate
2. Text attribute :
vertical-align: vertical text alignment
text-decoration: specifies the decoration added to the text
text-shadow: text shadow effect
white-space: processing of whitespace characters
unicode- bidi: Set the direction of the text
3. Box model attributes:
width, height, margin, margin-top, margin-right, margin-bottom, margin-left, border, border-style, border-top -style, border-right-style, border-bottom-style, border-left-style, border-width, border-top-width, border-right-right, border-bottom-width, border-left-width, border -color, border-top-color, border-right-color, border-bottom-color, border-left-color, border-top, border-right, border-bottom, border-left, padding, padding-top, padding -right, padding-bottom, padding-left
4, background attributes:
background, background-color, background-image, background-repeat, background-position, background-attachment
5, positioning attributes:
float, clear, position, top, right, bottom, left, min-width, min-height, max-width, max-height, overflow, clip, z-index
6. Generate content attributes:
content、counter-reset、counter-increment
7、Outline style attributes:
outline-style、outline-width、outline-color、outline
8、Page style attributes:
size、 page-break-before, page-break-after
9, sound style attributes:
pause-before, pause-after, pause, cue-before, cue-after, cue, play-during
2. Inherited attributes
1. Font family attributes
font: combined font
font-family: specifies the font family of the element
font-weight: sets the thickness of the font
font-size: Set the size of the font
font-style: Define the style of the font
font-variant: Set the font for small uppercase letters to display text, which means that all lowercase letters will be converted to uppercase, but All letters using small caps have a smaller font size compared to the rest of the text.
font-stretch: Stretch and transform the current font-family. Not supported by all major browsers.
font-size-adjust: Specify an aspect value for an element so that the x-height of the preferred font is maintained.
2. Text series attributes
text-indent: text indent
text-align: text horizontal alignment
line-height: line height
word-spacing: increase or decrease the spacing between words White space (i.e. word spacing)
letter-spacing: increase or decrease the space between characters (character spacing)
text-transform: control text case
direction: specify the writing direction of text
color: Text color
3, element visibility: visibility
4, table layout attributes:
caption-side, border-collapse, border-spacing, empty-cells, table-layout
5, list layout Attributes:
list-style-type, list-style-image, list-style-position, list-style
6, generated content attributes: quotes
7, cursor attributes: cursor
8, Page style attributes:
page, page-break-inside, windows, orphans
9, Sound style attributes:
speak, speak-punctuation, speak-numeral, speak-header, speech-rate, volume, voice-family, pitch, pitch-range, stress, richness,, azimuth, elevation
3. Attributes that can be inherited by all elements
1. Element visibility: visibility
2. Cursor attributes: cursor
4. Attributes that can be inherited by inline elements
1. Font family attributes
2. Text series attributes except text-indent and text-align
5. Block-level elements Attributes that can be inherited
1, text-indent, text-alignnce_and_cascade#The_cascade
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