See If Src Of Img Exists

So you're working on a web development project and you're wondering how to check if the `src` of an image exists on a webpage. This can be a common need when you want to ensure that images are getting loaded correctly or if you want to handle cases where the image doesn't load for some reason. Don't worry, in this article, we'll guide you through a simple and effective way to see if the `src` of an image exists using JavaScript.

One straightforward method to check if the `src` of an image exists is by utilizing JavaScript. By accessing the `complete` property of the `Image` object, you can determine if the image source has been successfully loaded.

Below is an example code snippet demonstrating how to implement this check:

// Create a new Image object
const img = new Image();

// Set the source of the image
img.src = 'https://example.com/image.jpg';

// Check if the image source exists
img.onload = () => {
    if (img.complete) {
        console.log('Image source exists.');
    } else {
        console.log('Image source does not exist.');
    }
};

In this code snippet, we first create a new Image object and set the `src` property to the URL of the image we want to check. We then use the `onload` event handler to wait for the image to load fully. Inside the event handler, we check the `complete` property of the image object. If `img.complete` returns `true`, it means the image source exists; otherwise, it doesn't.

Additionally, you can handle cases where the image fails to load by adding an `onerror` event handler:

// Handle the case where the image fails to load
img.onerror = () => {
    console.log('Failed to load image source.');
};

By adding the `onerror` event handler, you can catch situations where the image source is unreachable or incorrect.

It's important to note that this method relies on the image being loaded in the browser. If you need to check the existence of a remote image without loading it, you may need to implement a server-side solution or use a different approach such as making a HEAD request to the image URL using AJAX.

By following the steps outlined in this article and utilizing JavaScript to check if the `src` of an image exists, you can ensure the smooth loading of images on your website and handle potential errors gracefully. So go ahead, give it a try, and let your code do the talking!