Forcing Browser to Download Image Files on Click

Issue:

Users often face the need to download image files from a browser. However, clicking on an image typically only opens it in the same tab or window, unlike the behavior exhibited when clicking on an Excel sheet, which prompts the user to save the file.

Solution:

Implementing this functionality using client-side programming involves a two-step process:

1. Add the 'download' Attribute to Links:

   HTML5 introduces the 'download' attribute, which can be added to anchor tags pointing to image URLs. This attribute signals to compliant browsers that the linked resource should be downloaded as a file.

2. Handle the Click Event:

   To prevent the browser's default action of opening the image in the same tab, handle the 'click' event on the anchor tag containing the image link. Use this event handler to call a function that saves the image to the user's computer.

Example Implementation:

In the provided code, a 'click' event handler is attached to the document, which checks if the clicked element is an anchor tag containing the text "Image." If so, it calls the saveImageAs1 function, which:

• Prompts the user to confirm the save operation.
• Opens a new window containing the image URL.
• Executes the "SaveAs" command.
• Closes the newly opened window.

Excel Sheet Download Behavior:

In the case of an Excel sheet, the browser automatically sets the 'Content-Disposition' header to 'attachment,' which instructs the browser to prompt the user to save the file. You can achieve similar behavior for image files by simulating this header in the backend. However, it's important to note that this is a server-side implementation and falls outside the scope of client-side programming alone.