jquery images cannot be displayed

In the process of web development, pictures are often used to enrich page content, but sometimes pictures cannot be displayed. This problem is usually related to the file path or file name. This article will introduce how to use jQuery to quickly solve the problem of images not being displayed.

1. Confirm the image file path

The most common reason is that the image file path is wrong or the image file does not exist. We need to confirm whether the image file path is correct. If the image file path is wrong, the browser will send an error request to the server, causing the image to fail to display properly. Another common mistake is misspelling the image file name, which can also cause the image to not be displayed. Therefore, we need to confirm whether the image file path and file name are correct.

2. Use jQuery to solve the problem that the picture cannot be displayed

When the picture cannot be displayed, we can use jQuery to solve this problem. jQuery is a powerful JavaScript library that can simplify JavaScript programming and improve development efficiency. With jQuery, we can find DOM elements and manipulate them, as well as perform various JavaScript functions. Here's how to use jQuery to solve the problem of images not being displayed.

1. Use jQuery to operate the img tag

Using jQuery, we can operate the img tag after the page is loaded to ensure that all images have been loaded and can be displayed correctly. We can use the following code to check if the image is loading correctly:

$('img').each(function(){
  if(!this.complete || typeof this.naturalWidth == "undefined" || this.naturalWidth == 0) {
    // 图片无法载入
    // 添加错误处理代码
  }
});

The above code will loop through the img tags and check if they have fully loaded and can be displayed correctly. If the image cannot be loaded, you can add error handling code in the code, such as adding a default image, or giving an error message, etc.

2. Execute the action after the image is loaded

You can also use jQuery's ready() function to ensure that the image has been loaded before executing the action. In the following example, the loadImage() function will execute the action after all images are loaded:

$(document).ready(function() {
    var imgLoad = imagesLoaded('img');
    imgLoad.on('progress', function(instance, image) {
        loadImage();
    });
    imgLoad.on('done', function(instance) {
        loadImage();
    });
});

function loadImage() {
    // 图片加载完成后执行的代码
}

The above code will check all img tags after the document is ready, and execute loadImage after all images are loaded. () function. This way we can execute the corresponding logic after loading is complete.

3. Avoid the problem of images not being displayed

In addition to using jQuery to solve the problem of images not being displayed, we can also avoid this problem through the following methods:

1. Check whether the image path and file name are correct and ensure that the image file exists.
2. Avoid using relative paths and use absolute paths instead. This ensures that the link is directed to the correct location.
3. Set a common class for all images to avoid using redundant code in the code.
4. Use small images as much as possible to reduce loading time and bandwidth usage.

Summary

This article introduces how to use jQuery to quickly solve the problem of images not being displayed. We can ensure that the image has been loaded correctly and can be displayed normally by checking the correctness of the image path and file name, using jQuery to operate the img tag, or using jQuery's ready() function.

Avoiding the problem that images cannot be displayed can improve the user experience of the website and avoid affecting user browsing and search engine optimization. Hope this article helps to solve this problem.

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