How to make font bold in css

In web design, for the display of text, it is often necessary to adjust the font style by using CSS to make the page look more beautiful and have better readability. Among them, bold font is a common font effect, especially often used in titles and important content. In this article, we will introduce how to use text bolding in CSS to achieve this effect.

1. Use the font-weight attribute

The font-weight attribute of CSS can adjust the font thickness of the text. Usually, the values ​​of this attribute include normal, bold, bolder, lighter, etc., but among them, the most commonly used values ​​are normal and bold. Among them, normal means normal font, and bold means bold font. For example:

h1 {
  font-weight: bold;
}

In the above sample code, we achieve the bold display effect of the title by setting the font thickness of the h1 tag to bold. Of course, for other tags or elements, you can also set the font-weight attribute to make the font bold.

2. Use emphasis tags

In addition to adjusting the font thickness through the font-weight attribute, you can also use emphasis tags in HTML to achieve the same effect. Usually, the strong tag and em tag in HTML can achieve bold and italic effects, as shown below:

<strong>加粗文字</strong>
<em>斜体文字</em>

However, it should be noted that although using HTML emphasis tags can achieve bold fonts, this method It is inconsistent with the semantics of web pages and is not recommended for use in actual projects.

3. Use external fonts

In addition, you can also implement customized bold fonts by referencing external font libraries. When referencing an external font library, the font file is usually introduced into the page through the @font-face rule, and then the font is called by setting the font-family attribute of the font, as shown below:

@font-face {
  font-family: custom;
  src: url('custom.ttf');
  font-weight: bold;
}

h1 {
  font-family: custom;
}

In this example, we first load a custom font file named custom.ttf, and then ensure that it can be used for bold text display by setting its font-weight property to bold. Next, we assign the font-family attribute of this font to the h1 tag to achieve a custom font bolding effect for the title.

Summary

In general, there are many ways to bold CSS text, such as using the font-weight attribute, HTML tags, integrating external fonts, etc. However, it should be noted that the appropriate method should be selected to achieve the bold font effect based on actual needs and semantic principles. At the same time, you also need to pay attention to the balance and overall beauty of the font, and avoid excessive use of bold effects, which will affect the overall page effect.

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