Thuộc tính width của button
<!DOCTYPE html>
<html>
<head>
<style>
.button {
background-color: #4CAF50; /* Green */
border: none;
color: white;
padding: 15px 32px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
margin: 4px 2px;
cursor: pointer;
}
.button1 {width: 250px;}
.button2 {width: 50%;}
.button3 {width: 100%;}
</style>
</head>
<body>
<h2>Set Button Widths</h2>
<p>Use the width property to change the width of the button:</p>
<button class="button button1">250px</button><br>
<button class="button button2">50%</button><br>
<button class="button button3">100%</button>
<p><strong>Tip:</strong> Use pixels if you want to set a fixed width and use percent for responsive buttons (e.g. 50% of its parent element). Resize the browser window to see the effect.</p>
</body>
</html>
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