Modify font style css

In front-end development, CSS is a very important technology. CSS is a style sheet language that describes how documents are presented. It controls the style, layout, color, etc. of HTML documents to provide users with better visual effects. Among them, font style adjustment is one of the most basic and commonly used functions in CSS. This article will introduce how to use CSS to modify the font style of a web page.

1. Font attributes

In CSS attributes, common font style attributes include font-family, font-size, font-weight, font-style, etc. We will introduce them one by one below. .

1. font-family

The font-family property controls the font family of text. A font family can be the name of one or more fonts, and the browser will display them in order until it finds a font that exists on the user's computer. For example:

body {
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
}

In the above CSS style, first try to use the Arial font. If the font is not available on the user's computer, try to use the "Helvetica Neue" or Helvetica font, and finally use sans-serif as the alternative font.

2. font-size

The font-size property controls the size of text. It can use relative units (such as em, rem) or absolute units (such as px, pt). For example:

p {
  font-size: 16px;
}

3. font-weight

The font-weight property is used to set the thickness of the font. Its values ​​are normal, bold, bolder, lighter and various numeric values. For example:

h1 {
  font-weight: bold;
}

4. font-style

font-style attribute controls the style of text. Its values ​​are normal, italic, and oblique. For example:

em {
  font-style: italic;
}

2. Font introduction

If special fonts need to be used in the web page, we can use the @font-face rule to convert the font file into a font resource. For example:

@font-face {
  font-family: 'MyFont';
  src: url('myfont.ttf');
}

The above rules indicate that the myfont.ttf font file is imported and defined as the MyFont font. You can then use the font in the style:

h1 {
  font-family: 'MyFont';
}

3. Font optimization techniques

In order to make the fonts display better on different devices, we can use the following optimization techniques:

1. Use font families commonly used by the website

Using a common font family can make the page load faster and reduce the possibility of converting into images. For example:

html, body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
}

2. Limit the size of font resources

Font resources are often very large, we can use online compression tools to compress them and limit the size. For example:

@font-face {
  font-family: 'MyFont';
  src: url('myfont.woff2') format('woff2'),
       url('myfont.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  ... /* 其他属性 */
  font-display: swap; /* 加载非活动选项卡 */
  unicode-range: U+000-5FF; /* 限制字符使用范围 */
}

3. Use the system default font

Using the system default font can make the text display more unified and stable. For example:

body {
  -webkit-font-smoothing: antialiased; /* 平滑字体 */
  -moz-osx-font-smoothing: grayscale;
}

4. Summary

Font style is a very important aspect in web design. Through the CSS properties and techniques introduced above, we can easily control and optimize font styles for Provide users with a better reading experience.

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