CSS Viewport: How to use vmax and vw to implement adaptive text width

CSS Viewport: How to use vmax and vw to implement adaptive text width

With the popularity of mobile devices, responsive design has become the standard for web design Important concepts. Among them, adaptive text width to maintain consistent display effects under different screen sizes is an important technology. This article will introduce how to use CSS Viewport units, especially vmax and vw units, to implement adaptive text width. In addition to theoretical explanations, we will also provide specific code examples for readers' reference.

1. What are CSS Viewport units

CSS Viewport units are units relative to the size of the viewport (browser window). In CSS3, four new Viewport units were introduced: vw, vh, vmin, and vmax. Among them, vw represents the percentage of the viewport width, vh represents the percentage of the viewport height, vmin represents the smaller of the viewport width and height, and vmax represents the larger of the viewport width and height.

2. How to implement adaptive text width using vmax and vw

1. Define the baseline font size

First, define a baseline in the CSS file Font size, such as:

:root {
  font-size: 16px;
}

where, :root represents the root element of the document (usually the html element), here we use it as the basis for font size setting .

2. Use vmax and vw units to set the font size and container width

Next, we can use vmax and vw units to set the font size and container width, specific steps As follows:

.container {
  width: 50vw; /* 容器的宽度为视口宽度的一半 */
}

.text {
  font-size: 5vmax; /* 设置文字的大小为视口宽度和高度中较大的那个的 5% */
}

In the above code, we set the width of the container to half the width of the viewport, so that the container will adaptively adjust as the width of the viewport changes. At the same time, we use vmax units to set the size of the text to 5% of the larger of the viewport width and height, so that the width of the text will also adjust adaptively.

3. Add media queries

In some cases, we may need to use different styles on specific screen sizes. In this case, you can use media queries to apply different styles for different viewport sizes. For example:

@media screen and (max-width: 600px) {
  .container {
    width: 90vw; /* 在小屏幕下将容器的宽度设置为视口宽度的 90% */
  }

  .text {
    font-size: 4vmax; /* 在小屏幕下将文字的大小设置为视口宽度和高度中较大的那个的 4% */
  }
}

In the above code, we use the @media media query to specify the style to be applied when the screen width is less than or equal to 600px. On small screens, the width of the container will be 90% of the viewport width, and the size of the text will be 4% of the larger of the viewport width and height.

Summary:

By using CSS Viewport units, especially vmax and vw units, we can easily achieve the effect of adaptive text width. By setting the container width and text size as a percentage of the viewport width and height, we can ensure consistent display across different screen sizes. At the same time, by adding media queries, we can also apply different styles under specific screen sizes to further optimize the user experience.

I hope this article will help readers understand the use of CSS Viewport units and implement adaptive text width. If you have questions or need more code examples, please feel free to ask.

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