Master the overflow attribute to achieve the overflow effect of web page content

Learn how to use the overflow attribute to achieve the overflow effect of web page content

In web design and development, we often encounter situations where we need to display overly long content or images. . In order to better handle this situation, you can use the overflow attribute in CSS to achieve the overflow effect of web page content. This article explains how to use the overflow attribute and provides specific code examples.

The overflow attribute is used in CSS to control the overflow behavior when the content of an element exceeds its own scope. It has four optional values: visible (default value), hidden, scroll and auto. We will introduce the application of these four values ​​​​in achieving the overflow effect of web content.

1. visible

visible is the default value of the overflow attribute. When the content exceeds the scope of the element, it will be displayed outside the element. This may result in confusing page layout. Therefore, we generally do not use this value to achieve content overflow effects.

2. hidden

The hidden value will hide content beyond the scope of the element and will not be displayed on the page. This can be achieved by setting the width and height of the element and the overflow property to hidden.

<style>
    .container {
        width: 200px;
        height: 200px;
        overflow: hidden;
    }
</style>

<div class="container">
    <img src="/static/imghwm/default1.png"  data-src="example.jpg"  class="lazy" alt="example">
</div>

In the above code, we create a parent container and set the width and height to 200px, and the overflow attribute to hidden. Then insert an image into the container. When the width or height of the image exceeds 200px, the excess part will be hidden.

3. scroll

The scroll value will add a scroll bar so that the user can scroll to view content beyond the scope. This can be achieved by setting the width and height of the element and the overflow property to scroll.

<style>
    .container {
        width: 200px;
        height: 200px;
        overflow: scroll;
    }
</style>

<div class="container">
    <img src="/static/imghwm/default1.png"  data-src="example.jpg"  class="lazy" alt="example">
</div>

In the above code, we create a parent container and set the width and height to 200px, and the overflow attribute to scroll. Then insert an image into the container. When the width or height of the image exceeds 200px, a scroll bar will be displayed, and the user can view the content beyond the range through the scroll bar.

4. auto

The auto value automatically determines whether to add scroll bars based on the actual width and height of the element content. If the content exceeds the width or height of the element, scroll bars will appear. If the content does not exceed the element's width or height, no scroll bars are displayed.

<style>
    .container {
        width: 200px;
        height: 200px;
        overflow: auto;
    }
</style>

<div class="container">
    <img src="/static/imghwm/default1.png"  data-src="example.jpg"  class="lazy" alt="example">
</div>

In the above code, we create a parent container and set the width and height to 200px, and the overflow attribute to auto. Then insert an image into the container. When the width or height of the image exceeds 200px, a scroll bar will be displayed, and the user can view the content beyond the range through the scroll bar.

To sum up, by using the overflow attribute of CSS, we can achieve the overflow effect of web page content and select the applicable value according to specific needs. The above is the introduction and code examples of these four values. I hope it can help you better master the method of using the overflow attribute to achieve the overflow effect of web page content.

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