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what does box-sizing: border-box mean
box-sizing: border-box is a CSS property that defines how the width and height of an HTML element are calculated. It includes the element's content, padding, and border, but not its margin, in its total width and height. This is useful because it allows us to set a specific width and height for an element without worrying about adding additional width or height to it due to padding or borders. Here's an example:
css Copy code
.example {
box-sizing: border-box;
width: 200px;
padding: 20px;
border: 2px solid black;
}
In this example, we set the width of the .example element to 200px. With box-sizing: border-box, the total width of the element will be 200px, including the 20px of padding and 2px of border on each side of the element.
I would like to make 3 columns using html and css
Sure, let me help you with that.
To create 3 columns using HTML and CSS, you can use the <div> tag to create 3 separate divisions and apply CSS styles to position them side by side. Here is an example code snippet to achieve that:
html Copy code
<!DOCTYPE html>
<html>
<head>
<style>
.column {
float: left;
width: 33.33%;
padding: 10px;
box-sizing: border-box;
}
.row::after {
content: "";
clear: both;
display: table;
}
</style>
</head>
<body>
<div class="row">
<div class="column">
<h2>Column 1</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam in enim vel justo convallis luctus a quis nisi.</p>
</div>
<div class="column">
<h2>Column 2</h2>
<p>Phasellus eu purus nibh. Fusce lacinia risus euismod felis tempus pulvinar. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos.</p>
</div>
<div class="column">
<h2>Column 3</h2>
<p>Suspendisse et ligula convallis, hendrerit turpis vitae, placerat nunc. Sed convallis metus varius urna viverra eleifend.</p>
</div>
</div>
</body>
</html>
In this example, we wrap our 3 columns in a div container with a class of "row" to group them together. We then create another div with a class of "column" for each of the columns we'd like to create. To position the columns side by side, we set float: left for each column and give them a width of 33.33% to fit evenly in a row. Finally, we add some padding and box-sizing to make sure our columns looks good and are properly spaced.
I hope this helps!
What is box-sizing? Why we need it?
Box-sizing is a CSS property that allows developers to specify how the CSS property width should be calculated. It is needed because by default, the width of elements is calculated from the content width. By setting the box-sizing property to border-box, the width of the element is calculated from the border of the element, rather than the content width. This can be useful for ensuring consistent spacing, margins or padding.
For example, in the code below, the div element will be given a width of 200px regardless of its content:
css Copy code
div {
width: 200px;
box-sizing: border-box;
}
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