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How to inline css styles

青灯夜游
青灯夜游Original
2021-07-21 17:12:598629browse

Method of inline css style: Use the style attribute of the tag to directly place the CSS style in the tag, with the syntax "".

How to inline css styles

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

Inline css style, also known as inline style, is to put the CSS style directly in the tag within the line of code, usually in the style attribute of the tag. Since the inline style is directly inserted into the tag, it is The most direct way, but also the most inconvenient style to modify.

Example:

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>行内样式</title>
</head>
<body>
    <p style="background-color: #999900">行内元素，控制段落-1</p>
    <h2 style="background-color: #FF6633">行内元素，h2 标题元素</h2>
    <p style="background-color: #999900">行内元素，控制段落-2</p>
    <strong style="font-size:30px;">行内元素，strong 比 em 效果要强</strong>
    <div style="background-color:#66CC99; color:#993300; height:30px; line-height:30px;">行内元素，div 块级元素</div>
    <em style="font-size:2em;">行内元素，em 强调</em>
</body>
</html>

Rendering:

How to inline css styles

In the above example, the inline style is composed of the HTML element style attribute, that is, put the CSS code within quotes, and multiple CSS attribute values ​​​​are separated by semicolons. For example, in the example of writing the

tag block-level element 
<div style="background-color:#66CC99; color:#993300; height:30px; line-height:30px;">行内元素，div 块级元素 </div>

, we Abandon the past way of writing HTML structure and style together, that is,

.

The paragraph

tag sets the background color to brown (background-color: #999900), and the title

tag sets the background color to red (background-color: #FF6633).

Set the font of the label to 30 pixels (font-size:30px;), set the height and line height of the

label to 30 pixels and set the background color and color (background-color :#66CC99; color:#993300; height:30px; line-height:30px;), tag sets the font size to relative units (font-size: 2em;).

The two paragraph

tags have different contents, but use the same background color setting, but add two CSS inline attributes to set the background color background-color: #999900.

tag,

tag,

tag are block-level elements, set their CSS properties, and the browser supports them; tag, tag are inline Element, set its CSS properties, and the browser supports it; therefore, CSS inline styles are valid regardless of inline elements or block-level elements.

In short, although inline elements are simple to write, the following defects can be found through examples:

  • Every tag needs to be styled to add the style attribute.

  • The difference from the past when web page makers mixed HTML tags and styles together is that inline styles are now written through CSS, and HTML tag attributes were used in the past. Although the methods are different, the style effect is the same: the later maintenance cost is high, that is, when modifying the page, you need to open each page of the website one by one and modify it one by one, and you cannot see the role of CSS at all.

  • Adding so many inline styles will make the page large. If the portal is written in this way, it will waste server bandwidth and traffic.

Some web pages on the Internet can see this way of writing by looking at the source file. Although only part of a web page is done this way, it needs to be differentiated according to the situation:

  • If the web page author writes such an inline style, he can quickly change the current style without considering the conflict of previously written styles;

  • If this situation exists in the web page, When editing in the background, the styles are generated through the editor, or the background is not fully developed. It is necessary to develop options for editors to select styles instead of directly changing the color, thickness, background color, tilt and other effects through the editor.

(Learning video sharing: css video tutorial)

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