The error message “Failed to execute ‘createobjecturl’ on ‘url’: overload resolution failed” typically occurs when there is an issue with the usage of the `createObjectURL()` function in JavaScript.
The `createObjectURL()` function creates a DOMString containing a URL representing the object given in the parameter. It is commonly used to create a URL for a Blob object or a File object, which can then be used as the source for elements like `` or ``.
The error message “overload resolution failed” suggests that the function is being called with incorrect parameters that do not match any valid overload of `createObjectURL()`. Overload resolution refers to choosing the correct version of a function based on its parameters.
To resolve this issue, it is important to ensure that the argument passed to `createObjectURL()` is a valid object that can be converted into a URL. Here are some examples:
Example 1: Creating a URL for a Blob
const blob = new Blob(['Hello, World!'], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
// Use the URL as the source for an image
const img = document.createElement('img');
img.src = url;
document.body.appendChild(img);
In this example, a new Blob object is created with the text “Hello, World!” and a MIME type of `text/plain`. The `createObjectURL()` function is then used to generate a URL for the Blob, which is assigned to the `src` attribute of an `` element. Finally, the image element is added to the document body.
Example 2: Creating a URL for a File
const input = document.querySelector('input[type="file"]');
const file = input.files[0];
const url = URL.createObjectURL(file);
// Use the URL as a download link
const link = document.createElement('a');
link.href = url;
link.download = file.name;
link.textContent = 'Download File';
document.body.appendChild(link);
In this example, an `` element is used to allow the user to select a file from their device. The selected file is accessed using the `files` property of the input element. The `createObjectURL()` function is then used to generate a URL for the File object, which is assigned to the `href` attribute of an `` element. The `download` attribute specifies the name of the file when it is downloaded. Finally, the link element is added to the document body.
Make sure to check your code and verify that the parameter being passed to `createObjectURL()` is of the correct type. Additionally, it is good practice to release the object URL using `URL.revokeObjectURL()` when it is no longer needed to prevent memory leaks.