How to use css to leave no gaps in the page

In modern web design, CSS has long become an indispensable part. Different CSS techniques allow us to achieve various magical effects and make web pages look more beautiful and professional. Today, we’re going to discuss an advanced CSS technique: leaving no gaps.

The so-called "leaving no gaps" refers to completely removing the gaps between elements in the layout of the web page, making the page look more beautiful and tidy. This technique requires the learning and application of some CSS knowledge. Some implementation methods will be introduced in detail below to help readers better master this technique.

1. First of all, we need to solve the gap problem caused by the border. When defining the border of an element, if no special processing is done, the problem of border spacing will occur. This is because the border style itself has a default width, and the spacing between elements is also caused by this width. Therefore, we need to add a negative margin to the element to compensate for the offset caused by the width of the border and the gap.

For example, if you define a 1px border on a div, then you need to set the margin-left and margin-right of the div to -1px respectively.

div{

border:1px solid #000;
margin-left:-1px;
margin-right:-1px;

}

2. Next, we need to solve the white space problem caused by floating elements. The concept of a floated element is simple: it takes an element out of the normal document flow and allows it to float around other elements. However, when multiple floating elements are arranged together, the problem of white space may also occur. This is because the floating elements themselves do not occupy space in the document flow, and the white space between them is caused by the lack of this space.

The way to solve this problem is to use some simple CSS rules to align floating elements with adjacent margins and line them up. This method is often called "clearing the float".

.clearfix::after{

content:"";
clear:both;
display:block;

}

.clearfix{

zoom:1;

}

In this code, we pass Using the CSS "::after" selector, a pseudo element is created, which plays an important role in "clearing floats". We define this actual pseudo-element as "block" and let it clear the floating state of the element to arrange the position of the floating elements and avoid gaps.

3. Finally, let’s discuss the impact of negative margins on layout. In actual layout design, you may want to adjust the position and size of elements by setting negative margins. However, in CSS design, negative margins can cause overlapping elements, which in turn affects the overall effect of the layout.

In order to solve this problem, we can use the "calc()" function in CSS3, which can automatically match the position and size of elements through calculation to avoid overlap.

For example, the following is a sample code:

div{

width:calc(50% - 10px);
margin-right:20px;

}

In this example, we use the "calc()" function To calculate the width of the element, make it occupy half of the width of the parent element, trim the 10px margin, and leave 20px of white space on the right side of the element.

In short, CSS without gaps is a very advanced CSS technology that requires readers to have a deep understanding and mastery of CSS knowledge. But we still hope that readers will master this technology, because it can make your web design more perfect and beautiful.

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