So there might be a few things wrong here. First start by reading how to use XMLHttpRequest.open() because there’s a third optional parameter for specifying whether to make an asynchronous request, defaulting to true. That means you’re making an asynchronous request and need to specify a callback function before you do the send(). Here’s an … Read more
XMLHttpRequest was invented by Microsoft’s Outlook Web Access team. This highly innovative team previously gave us remote scripting, which was the the beginning of “AJAX” style development. Remote scripting was like JSONP, but overly complicated (it used a Java applet, of all things). I don’t remember whether it was possible to dynamically inject <script> elements … Read more
Yes, open the contextmenu in the console, and remove the check at Log XMLHttpRequests. You can still inspect the network traffic at the Network tab.
To quote from the RFC 1341, section 7.2.1, what I consider to be the relevant bits on the boundary parameter of the Content-Type header (for MIME): All subtypes of “multipart” share a common syntax … The Content-Type field for multipart entities requires one parameter, “boundary”, which is used to specify the encapsulation boundary. The encapsulation … Read more
TLDR; If you’re looking for a way to control the contents of an <iframe> via React in a de-facto canonical way, Portals are the way to go. And as with all things Portal: Once you establish a reference to an existing and mounted DOM node (in this case that would be the contentWindow of a … Read more
Your error InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable appears because you must call setRequestHeader after calling open. Simply move your setRequestHeader line below your open line (but before send): xmlhttp.open(“POST”, url); xmlhttp.setRequestHeader(“x-filename”, photoId); xmlhttp.send(formData);
What I can do to fix this (other than installing a real SSL certificate). You can’t. On an https webpage you can only make AJAX request to https webpage (With a certificate trusted by the browser, if you use a self-signed one, it will not work for your visitors)
There is no such thing as xhr.file = file;; the file object is not supposed to be attached this way. xhr.send(file) doesn’t send the file. You have to use the FormData object to wrap the file into a multipart/form-data post data object: var formData = new FormData(); formData.append(“thefile”, file); xhr.send(formData); After that, the file can … Read more
Have you tried using the MIME type for JSON? application/json You could also configure your server to send this MIME type automatically for .json files.
First, you’ll need to edit your manifest.json and add the permission for www.example.com: For the new Manifest V3, use the host_permissions field: { “manifest_version”: 3, … “host_permissions”: [ “https://www.example.com/*” ], … } If you are still using the old Manifest V2, use the permissions field: { “manifest_version”: 2, … “permissions”: [ “https://www.example.com/*” ], … } … Read more