Kaiido thanks for responding so quickly mate. I added the revokeObjectURL and got some different behaviour. I tried a few different approaches like generating the object URL on mount and then adding that as the href to the DOM which works for safari and firefox but chrome has problems. Unfortunately as I said I don't have an iOS device to test this out This should work per the standards.
I'm sorry but we will probably need a third person to help here. Add a comment. Akansh Akansh 1, 3 3 gold badges 14 14 silver badges 34 34 bronze badges. DanieleCruciani I guess you're right. I did it twice while making code more readable. Updated the code. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. The browser will decode the string and show the image:. It can read data from Blobs in multiple formats.
Both ways of making a URL of a Blob are usable. But usually URL. We can create a Blob of an image, an image part, or even make a page screenshot. In the example below, an image is just copied, but we could cut from it, or transform it on canvas prior to making a blob:. Then we can get a Blob of it the same way as above. Internet Explorer still does not supports the native ES6 promises, and Axios depends heavily on them.
Download Algorithm Create a text area to enter the text data. This will help us to replace certain special characters with a combination of escape sequences. Append this created element to the body of the document HTML page. Use element. Remove the element from the body of the document HTML page. You can learn about FileReader objects here. A FileReader object provides some very helpful methods for asynchronously reading the content of blob objects or files in different ways.
The FileReader interface has pretty good browser support and supports reading blob data as follows as at the time of this writing :. Here is what a typical object URL looks like:.
The URL. Here is what it looks like:. It is important to note that, this method will always return a new object URL each time it is called, even if it is called with the same blob object.
Whenever an object URL is created, it stays around for the lifetime of the document on which it was created.
Usually, the browser will release all object URLs when the document is being unloaded. However, it is important that you release object URLs whenever they are no longer needed in order to improve performance and minimize memory usage. It takes the object URL to be released as its argument. For example:. We have also seen how we can programmatically extract or generate content in the browser using Web APIs.
In this section, we will examine how we can download programmatically generate content in the browser, leveraging all we have learned from the beginning of the article and what we already know about blobs and object URLs.
The logic of our helper function can be broken down as follows:. Here is what an implementation of this helper function will look like:. That was a pretty straightforward implementation of the download link helper function. Notice that the helper triggers a one-off automatic download of the blob content whenever it is called.
Also notice that the helper function takes a filename as its second argument, which is very useful for setting the default filename for the downloaded file. Now that we have our download helper function in place, we can revisit our previous examples and modify them to trigger a download for the generated content.
Here we go. We will update the final promise.
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