Use CSS3 fit-content to achieve horizontal centering of elements

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Release: 2023-09-10 09:19:41
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利用CSS3 fit-content实现元素的水平居中效果

Use CSS3 fit-content to achieve the horizontal centering effect of elements

In web development, horizontal centering of elements has always been a common requirement. In the past, we often relied on CSS properties such as flexbox, margin, and position to achieve this, but these methods have some limitations and compatibility issues. Fortunately, the fit-content attribute was introduced in CSS3, which makes it easier to achieve the horizontal centering effect of elements.

What is the fit-content attribute? The fit-content attribute is a size implementation method of CSS3. It can calculate and set the width of an element based on the content of the element and the set min-width/max-width and other attributes. Specifically, the fit-content attribute can automatically adjust the width of the element based on the width of the element's content to achieve a horizontally centered effect.

To use the fit-content attribute to achieve the horizontal centering effect, we first need to set the display attribute of the element to inline-block or block, and set a fixed width to the element. Then, we need to apply some CSS properties on the parent element to achieve horizontal centering. Below we will introduce two methods to achieve this effect.

Method 1: Use flexbox

First, we need to set the display attribute of the parent element to flex, and set the justify-content attribute to center. This way, the parent element will center the child elements horizontally.

.parent { display: flex; justify-content: center; } .child { width: fit-content; }
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Method 2: Use margin attribute

Another method is to use margin attribute to achieve horizontal centering effect. We can set a left and right margin value to auto for the parent element, so that the left and right margins of the parent element will be automatically filled, so that the child element is centered horizontally.

.parent { margin-left: auto; margin-right: auto; } .child { width: fit-content; }
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It should be noted that the fit-content attribute may not be supported on some older browsers. For compatibility reasons, we can use alternatives to flexbox or margin methods.

Alternative Plan 1: Use table-cell method

If we need to be compatible with some older browsers, we can use display: table-cell and text-align: center to achieve the level of elements Centered. The disadvantage of this approach is that it treats the element as a table cell, which may have an impact on other styles.

.parent { display: table-cell; text-align: center; vertical-align: middle; } .child { display: inline-block; }
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Alternative 2: Use absolute positioning and transform method

Another alternative is that we can absolutely position the child element relative to the parent element and use the transform attribute to achieve horizontal centering . However, it should be noted that using absolute positioning may affect other layouts.

.parent { position: relative; } .child { position: absolute; left: 50%; transform: translateX(-50%); }
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To sum up, using the fit-content attribute of CSS3, we can more easily achieve the horizontal centering effect of elements. At the same time, we also introduced alternative solutions to achieve horizontal centering using methods such as flexbox, margin, table-cell, and absolute positioning. Through different methods, we can choose the appropriate method to achieve the horizontal centering effect according to specific needs and compatibility requirements. Let us use the powerful functions of CSS3 to bring richer style effects to web development.

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