Javascript Multiple Files Preview using createObjectURL and FileReader
#javascript, #webdevelopment
Displaying the preview of the file uploaded is the most common feature we see on websites. This will make it easier for the client to see which file he has selected. We’ll be doing the same thing in this post where the files selected by the user are displayed in HTML as a preview.
In Javascript, there are various ways to preview files but in this post, we’ll cover two ways. The first is using URL.createObjectURL() method and the second is using FileReader with promise.
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Video Timeline
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00:21 Using Javascript createObjectURL() method
00:57 preview function
01:46 looping through multiple files
07:30 get_extension() function
09:14 Output from Javascript createObjectURL() method
09:30 Using Javascript FileReader object
10:25 Creating a promise function file_promise()
12:50 Output from Javascript FileReader object
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