This chapter will introduce how to use CSS to layout images.

Rounded corner picture

Example

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>php中文网(php.cn)</title> 
<style>
img {
    border-radius: 8px;
}
</style>
</head>
<body>
<h2>圆角图片</h2>
<p>使用 border-radius 属性来创建圆角图片:</p>
<img src="https://img.php.cn/upload/course/000/000/004/580989ec73194566.jpg" alt="Paris" width="400" height="300">
</body>
</html>

Example

Oval picture:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>php中文网(php.cn)</title> 
<style>
img {
    border-radius: 50%;
}
</style>
</head>
<body>
<h2>椭圆形图片</h2>
<p>使用 border-radius 属性来创建椭圆形图片：</p>
<img src="https://img.php.cn/upload/course/000/000/004/580989ec73194566.jpg" alt="Paris" width="400" height="300">
</body>
</html>


Thumbnails

We use the border attribute to create thumbnails.

Instance

img {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 5px;
}
<img src="https://img.php.cn/upload/course/000/000/004/580989ec73194566.jpg" alt="Paris">

Instance

a {
    display: inline-block;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 5px;
    transition: 0.3s;
}
a:hover {
    box-shadow: 0 0 2px 1px rgba
    (0, 140, 186, 0.5);
}
<a href="paris.jpg">
  <img src="https://img.php.cn/upload/course/000/000/004/580989ec73194566.jpg" alt="Paris">
</a>

Responsive images

Responsive images will automatically adapt to screens of various sizes.

In the example, you can check the effect by resetting the browser size:

Norway

If you need to freely scale the image, and the enlarged size of the image is not larger than its size For the original maximum value, you can use the following code:

Instance

img {
    max-width: 100%;
    height: auto;
}

Picture text

How to position Image text:

Example

Norway
Lower left corner
Upper left corner
Upper right corner
Lower right corner
Centered

Card style picture

Example

div.polaroid {
    width: 80%;
    background-color: white;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
img {width: 100%}
div.container {
    text-align: center;
    padding: 10px 20px;
}

Image Filter

CSS filter Attributes are used to add visual effects (such as blur and saturation) to elements.

Note: This attribute is not supported by Internet Explorer or Safari 5.1 (and earlier).

Example

Change the color of all pictures to black and white (100% grayscale):

img 
{
    
-webkit-filter:
 grayscale(100%);
 
/* Chrome, Safari, 
Opera */
     
    
filter:
 grayscale(100%);
}

Responsive picture album

Example

.responsive {
    padding: 0 6px;
    float: left;
    width: 24.99999%;
}
@media only screen and (max-width: 700px){
    .responsive {
        width: 49.99999%;
        margin: 6px 0;
    }
}
@media only screen and (max-width: 500px){
    .responsive {
        width: 100%;
    }
}


##Picture Modal (modal)

This example demonstrates how to combine CSS and JavaScript to render images together.

First, we use CSS to create a modal window (dialog box), which is hidden by default.

Then, we use JavaScript to display the modal window. When we click on the image, the image will be displayed in the pop-up window:

Example

// Get modal window
var modal = document.getElementById('myModal');
// 获取图片模态框，alt 属性作为图片弹出中文本描述
var img = document.getElementById('myImg');
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");
img.onclick = function(){
    modal.style.display = "block";
    modalImg.src = this.src;
    modalImg.alt = this.alt;
    captionText.innerHTML = this.alt;
}
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks on <span> (x), close the modal
span.onclick = function() { 
    modal.style.display = "none";
}

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