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Set css properties

王林

Release： 2023-05-27 13:33:08

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CSS (Cascading Style Sheets) is a language used to control the style of web pages. It can set the font, color, border, layout and other properties of the web page. When developing a web page, setting CSS properties is a crucial step. This article will introduce in detail how to set CSS properties, as well as commonly used property values and methods.

1. How to set CSS properties

Inline style: Add the style attribute to the HTML tag to set the CSS properties. For example:

<p style="color: red; font-size: 16px;">Hello, world!</p>

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Internal style sheet: add the style tag in the HTML head, and then set the CSS properties in it. For example:

<head>
  <style>
    p {
      color: red;
      font-size: 16px;
    }
  </style>
</head>
<body>
  <p>Hello, world!</p>
</body>

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External style sheet: Put the CSS code in a separate style sheet file, and then reference it in HTML through the link tag. For example:

<head>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <p>Hello, world!</p>
</body>

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2. Commonly used CSS attributes and their attribute values

Font attribute (font)

font-size: Set the font size in units such as pixels (px), percentage (%), em (multiples of the current font size as the basis), etc.
font-style: Set the font style, which can be "normal" (normal), "italic" (italic) or "oblique" (oblique).
font-weight: Set the weight of the font, which can be a number (such as 400) or a keyword (such as "normal", "bold").

background-image: Set the background image of the element, you can use a local image or a remote image address.
background-repeat: Set the repeat mode of the background image, which can be "repeat" (repeat), "repeat-x" (repeat horizontally), "repeat-y" (repeat vertically) or "no-repeat" "(Not repeating).
background-position: Set the position of the background image, you can use keywords (such as "left top", "center", "right bottom") or pixel values, percentage values, etc.

border-style: Set the border style, which can be "solid" (solid line), "dotted" (dotted line), "dashed" (dashed line), etc.
border-color: Set the color of the border, you can use color name or RGB value, RGBA value, etc.

height: Set the height of the element in units such as pixels and percentages.

text-decoration: Set the decoration effect of the text, which can be "none" (no decoration), "underline" (underline), "line-through" (strikethrough), etc.
text-transform: Set the case conversion method of text, which can be "uppercase" (uppercase), "lowercase" (lowercase), "capitalize" (first letter capitalized), etc.

padding: Set the inner margin of the element (the distance between the content of the element and the border), which can be in pixels, percentages and other units.
display: Set the display mode of the element, which can be "block" (block-level element), "inline" (inline element) or "inline-block" (inline block-level element), etc.

3. Summary

Setting CSS properties is a crucial step in web development. Proficient in using CSS properties, we can efficiently design beautiful and easy-to-use CSS properties. A web page that is easy to read and use. This article introduces commonly used CSS properties and their property values, and explains in detail three methods of setting CSS properties. I hope readers can use CSS flexibly in web development to create more outstanding web works.

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