As I have mentioned in my question, Download icon is visible in the toolbar but the progress is not visible in it also Hello, can you see your downloads in the library window? As you have suggested, the problem was caused by a 3rd party Add-On. After I have restarted Firefox in Safe Mode, everything seems to be working well.. I have tried your solution too and it worked as well.
But I still believe the root cause for the problem was caused by a 3rd Party Add-On. The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: This will cause you to lose any Extensions, Open websites, and some Preferences. Click the "Reset Firefox" button. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish. Firefox will open with all factory defaults applied. Anything unclear? Let's finally define our custom operator that's using scan with our accumulator and seed :.
Notice that this download operator accepts an optional parameter saver. Once a HTTP response is received, this function is invoked with the download content from inside the accumulator.
This allows us to pass in a strategy for persisting the download to a file without directly coupling the operator to FileSaver. By keeping FileSaver. The download operator can be tested without somehow mocking the saveAs import see here for corresponding tests. If we apply the same pattern to the service, we'll be able to test it just as easy.
So let's do that by creating a custom injection token for saveAs in a file called saver. Let's use the Progress Bar from Angular Material to show how far along our download is. The component now only has to assign an observable download to this property:. We can then subscribe to this observable through the AsyncPipe in combination with NgIf. While the download is pending we'll display the progress bar in 'buffer' mode you may also use 'query' , otherwise the progress is determinate.
The bar's value can then easily be applied from Download. Pro Tip : If you need to map something to more than two values inside a template or rather a ternary statement won't do it for you: map the observable to the type you need or use a custom pipe instead of calling a component function from the template.
Both methods are pretty easy to write, more declarative and perform better. Here's a StackBlitz showing everything in action. The downloaded file is only 3MB, so you might want to enable throttling to see more of the progress bar. I hope this article helped you with your project. Hire me , if you need further support solving your specific problem. However when downloading binary files, the responseType property of the request object is set to blob. Possible values of responseType property are empty string default , arraybuffer , blob , document , json , and text.
For simply downloading binary files use blob as the response type. For complex cases where you need to download a file and then manipulate the file's bytes - for example if you are building a Javascript "PPT Viewer", set arraybuffer as the response type. So you will see the progress bar gradually moves from left to right as the file gets downloaded. The speed of progress bar depends on the size of the file and your internet connection. So the progress bar has been set, now we display the percentage of the file downloaded in numbers.
As we have already created a span tag in HTML and a variable for it in javascript, so we just need to calculate the percentage and display in span tag. We can calculate the percentage of the file downloaded by dividing the file currently downloaded by total size of file. That will return the value in between 0 and 1, for example 0.
If you do not want to display the decimal points with it, you can call the floor method and it will return the integer value. Then we simply set this percentage in span tag and add the percentage sign with it too. At this point, if you were downloading that file via IDM or browsers default download manager, you will be able to view the downloading speed of your file.
So our next step is to show downloading speed too. Create a simple span tag and get it in javascript as we did earlier. To get the downloading speed, we have to apply some math on it. Getting the download speed means we need to know how much KB of data is transferred in one second. Since we are getting downloaded data in bytes so we can convert that in kilo bytes by simply dividing by First we will get the duration since the file started downloading till now.
We can get it by getting the difference between current time and start time. That will return the time in milliseconds, so we can convert that into seconds by dividing with When we get the total duration of AJAX then we can get the bytes transferred per second by dividing the data currently transferred by this duration.
Now we have the Bytes per second, we can simply convert that to KB by dividing with since there are bytes in one KB. This value may also be in decimal points, so we will convert that into integer too by using the same Math. The algorithm to calculate the remaining time is pretty simple. We get the difference between total size of file and the file currently being downloaded, and divide that by amount of data downloaded in bytes per second.
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