Convert an image to byte array using javascript

Question

The idea of the task is to create a incident in ticketing platform and attach a screenshot to the ticket created using a chat-bot. For the attachment to be done for the ticket created , i am using a upload attachment API which accepts the image in byte array type only.

API Body :

{"_ProxyDetails":{"Password":"test@123","ProxyID":0,"ReturnType":"JSON","UserName":"user@itsm.com","OrgID":1,"TokenID":""},"eModule":"IM","TicketID":14487, "FileByte":"", "AttachmentFileName":"testtextfile.txt"}

Where FileByte needs to be a byte array. I need the image to be converted to byte array using built in JavaScript library only. Can anyone help me to convert this image to bytearray type?

possible duplicate of https://stackoverflow.com/questions/9258932/how-to-convert-image-to-byte-array-using-javascript-only-to-store-image-on-sql-s — Naga Sai A, Nov 05 '18 at 21:32
Hey adrian , i have seen the question which naga pointed in the above comment. In that question they are converting it to base 64 string and sending the same String to C# code for byte array conversion. I dont need that kind of conversion. I would require a pure JS conversion only as i am doing this on a platform which supports JS only . So can you help me to convert the same using JS alone. — Arulvelu, Nov 08 '18 at 09:12
JSON doesn't understand bytearray. The field, as presented in your API Body example, is a unicode string. — Ouroborus, Nov 12 '18 at 13:01
@Ouroborus . Can you assist me to figure out how this byte array can be sent using API — Arulvelu, Nov 12 '18 at 13:05
Once you've converted the image to a data url as in https://stackoverflow.com/questions/9258932/how-to-convert-image-to-byte-array-using-javascript-only-to-store-image-on-sql-s , you can take that, trim off the beginning portion, and convert the rest of it to a binary string. E.g. `atob(getBase64Image().split(',')[1])` — Ouroborus, Nov 12 '18 at 13:20

Convert an image to byte array using javascript

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