Make a div scroll horizontally using CSS
在 CSS 中，我们可以通过设置适当的“over-flow”属性值来使 div 水平滚动。
首先，让我们了解为什么我们需要使 div 水平滚动。例如，父div元素的宽度为500px，或者屏幕尺寸为500px。现在，div 元素的内容是 1500px。因此，如果我们不让父 div 水平滚动，就会破坏应用程序的 UI。因此，我们可以使其可滚动，用户可以滚动查看不可见的内容。
语法
用户可以按照以下语法使 div 水平滚动。
.scroll {
width:<Width_of_div_element>;
overflow: scroll;
}
在上面的语法中，我们使用了“width”和“overflow”属性来使 div 水平滚动。如果我们不指定元素的宽度，“overflow”属性不会受到影响。
示例 1
在下面的示例中，我们创建了 HTML div 并添加了一些文本内容。在 CSS 中，我们为 div 元素指定了“500px”固定宽度。此外，我们还设置了“scroll”作为溢出属性的值。
在输出中，用户可以观察到，当文本宽度大于类名为“scroll”的 div 的宽度时，div 元素中出现水平滚动条。
<html>
<head>
<style>
.scroll {
margin: 5px;
padding: 5px;
border: 2px solid blue;
width: 500px;
overflow: scroll;
white-space: nowrap;
height: 50px;
}
</style>
</head>
<body>
<h3>Using the <i> overflow-x: scroll </i> to make a div horizontally scrollable using CSS</h3>
<div class = "scroll">
The United States of America (USA) has the largest GDP in the world. In 2020, the nominal GDP of the United
States was $21.43 trillion. China is the second-largest economy in the world, with a nominal GDP of $14.34
trillion in 2020. Other countries with large GDPs include Japan, Germany, and the United Kingdom.
</div>
</body>
</html>
示例 2
在下面的示例中，我们使用了“overflow: auto”CSS 属性来使 div 水平滚动。此外，我们还为 div 元素指定了固定宽度。 ‘auto’和‘scroll’值之间的主要区别是，当我们使用‘scroll’时，div始终保持可滚动，而当我们使用‘auto’时，div元素在发生溢出时变得可滚动。
<html>
<head>
<style>
.scroll {
border: 2px solid green;
width: 500px;
overflow: auto;
white-space: nowrap;
height: 50;
}
</style>
</head>
<body>
<h3>Using the <i> overflow: auto </i> to make a div horizontally scrollable using CSS</h3>
<div class = "scroll">
This is a sample text to put in the HTML div element. You can scroll this div horizontally.
</div>
</body>
</html>
示例 3
在下面的示例中，我们使用了“overflow-x: auto”CSS 属性来使 div 水平滚动。我们已在父 div 内添加了单个子 div。
在输出中，用户可以观察到，由于我们使用了“auto”值，最初外部 div 是不可滚动的。当我们点击“添加 div”按钮时，它会使用 JavaScript 将子 div 添加到父 div，并且当您添加 5 到 7 个子 div 时，它会自动变得可滚动。
<html>
<head>
<style>
.scroll { border: 2px solid green; width: 500px; overflow-x: auto; white-space: nowrap; display: flex; flex-direction: row; }
.inner { max-width: 250px; height: 100px; background-color: red; border: 2px dotted blue; margin: 3px; }
</style>
</head>
<body>
<h3>Using the <i> overflow-x: auto </i> to make a div horizontally scrollable using CSS</h3>
<div class = "scroll">
<div class = "inner">
Inner Div
</div>
</div>
<button onclick = "addDiv()"> Add div </button>
</body>
<script>
function addDiv() {
// add the div element to the scroll div
let scroll = document.querySelector('.scroll');
let new_div = document.createElement('div');
new_div.classList.add('inner');
new_div.innerHTML = 'Inner Div';
scroll.appendChild(new_div);
}
</script>
</html>
示例 4
在下面的示例中，我们使用 CSS 设计了滚动条。首先，我们使 div 可以水平滚动以显示滚动条。之后，我们设置滚动条的背景颜色。此外，我们还设计了滚动条轨道和滑块。
在输出中，用户可以观察到好看的滚动条，并根据需求进行设计。
<html>
<head>
<style>
.scroll {
width: 500px;
overflow-x: auto;
overflow-y: hidden;
white-space: nowrap;
border: 1px solid red;
scrollbar-width: thin;
scrollbar-color: grey;
}
/* styling the scroll bar */
.scroll::-webkit-scrollbar { width: 10px; height: 10px }
.scroll::-webkit-scrollbar-track { background: darkgray;}
.scroll::-webkit-scrollbar-thumb { background: grey; border-radius: 10px; }
</style>
</head>
<body>
<h3>Using the <i> overflow-x: auto </i> to make a div horizontally scrollable using CSS</h3>
<div class = "scroll">
This div is horizontally scrollable. How are you? Do you like CSS? Tutorials Point is a leading Ed Tech company striving to provide the best learning material on technical and non-technical subjects.
</div>
</body>
</html>
用户学会了使用 CSS 的“overflow”属性使 div 水平滚动。在第一个示例中，我们使用了“overflow:scroll”CSS 属性。在第二个示例中，我们使用了“overflow: auto”CSS 属性。在第三个示例中，我们使用了“overflow-x: auto”CSS 属性；在最后一个示例中，我们使用 CSS 设计了滚动条。
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