FormData.delete() - Web APIs
the delete() method of the formdata interface deletes a key and its value(s) from a formdata object. note: this method is available in web workers. syntax formdata.delete(name); parameters name the name of the key you want to delete. returns void. example the following line creates an empty formdata object and prepopulates it with key/value pairs from a form: var formdata = new formdata(myform); you can delete keys and their values using delete(): formdata.delete('username'); specifications specification status comment xmlhttprequestthe definition of 'delete()' in that specification. living standard ...

FormData.entries() - Web APIs
the formdata.entries() method returns an iterator allowing to go through all key/value pairs contained in this object. the key of each pair is a usvstring object; the value either a usvstring, or a blob. note: this method is available in web workers. syntax formdata.entries(); return value returns an iterator. example // create a test formdata object var formdata = new formdata(); formdata.append('key1', 'value1'); formdata.append('key2', 'value2'); // display the key/value pairs for(var pair of formdata.entries()) { console.log(pair[0]+ ', '+ pair[1]); } the result is: key1, value1 key2, value2 specifications specification status comment xmlhttprequestthe definition of 'entries() (as iterator<>)' in that specification. living standard initial defin...

FormData.keys() - Web APIs
the formdata.keys() method returns an iterator allowing to go through all keys contained in this object. the keys are usvstring objects. note: this method is available in web workers. syntax formdata.keys(); return value returns an iterator. example // create a test formdata object var formdata = new formdata(); formdata.append('key1', 'value1'); formdata.append('key2', 'value2'); // display the keys for (var key of formdata.keys()) { console.log(key); } the result is: key1 key2 specifications specification status comment xmlhttprequestthe definition of 'keys() (as iterator<>)' in that specification. living standard initial definition ...

FormData.values() - Web APIs
the formdata.values() method returns an iterator allowing to go through all values contained in this object. the values are usvstring or blob objects. note: this method is available in web workers. syntax formdata.values(); return value returns an iterator. example // create a test formdata object var formdata = new formdata(); formdata.append('key1', 'value1'); formdata.append('key2', 'value2'); // display the values for (var value of formdata.values()) { console.log(value); } the result is: value1 value2 specifications specification status comment xmlhttprequestthe definition of 'values() (as iterator<>)' in that specification. living standard initial definition ...

FormDataEntryValue - Web APIs
a string or file that represents a single value from a set of formdata key-value pairs. this type is returned by the formdata.get() and formdata.getall() methods. the formdata.get() method returns a single value while formdata.getall() returns an array of formdataentryvalues. note that the formdata.append() and formdata.set() methods allow passing a blob value, which is converted to a file in the process. ...

Index - Web APIs
tch, property, reference, streams the body read-only property of the body mixin is a simple getter used to expose a readablestream of the body contents. 358 body.bodyused api, body, experimental, fetch, property, reference, bodyused the bodyused read-only property of the body mixin contains a boolean that indicates whether the body has been read yet. 359 body.formdata() api, body, experimental, fetch, fetch api, formdata, method, needsexample, reference the formdata() method of the body mixin takes a response stream and reads it to completion. it returns a promise that resolves with a formdata object. 360 body.json() api, body, experimental, fetch, json, method, reference the json() method of the body mixin takes a response strea...
... 1413 force touch events advanced, dom, event, mobile, needsbrowsercompatibility, needscompattable, needsmobilebrowsercompatibility, reference force touch events are a proprietary, apple-specific feature which makes possible (where supported by the input hardware) new interactions based on how hard the user clicks or presses down on the touchscreen or trackpad. ...
...rce touch events advanced, dom, event, mobile, needsbrowsercompatibility, needscompattable, needsmobilebrowsercompatibility, reference force touch events are a proprietary, apple-specific feature which makes possible (where supported by the input hardware) new interactions based on how hard the user clicks or presses down on the touchscreen or trackpad. ...
...And 16 more matches

Sending forms through JavaScript - Learn web development
is executed on the server), you can send json/xml and process them however you want. but if you want to use a third party service, you need to send the data in the format the services require. so how should we send such data? the different techniques you'll require are done below. sending form data there are 3 ways to send form data: building an xmlhttprequest manually. using a standalone formdata object. using formdata bound to a <form> element. let's look at them in detail. building an xmlhttprequest manually xmlhttprequest is the safest and most reliable way to make http requests. to send form data with xmlhttprequest, prepare the data by url-encoding it, and obey the specifics of form data requests. let's look at an example: <button>click me!</button> and now the javascript: c...
...coded' ); // finally, send our data. xhr.send( urlencodeddata ); } btn.addeventlistener( 'click', function() { senddata( {test:'ok'} ); } ) here's the live result: note: this use of xmlhttprequest is subject to the same-origin policy if you want to send data to a third party web site. for cross-origin requests, you'll need cors and http access control. ...
...his use of xmlhttprequest is subject to the same-origin policy if you want to send data to a third party web site. for cross-origin requests, you'll need cors and http access control. using xmlhttprequest and the formdata object building an http request by hand can be overwhelming. fortunately, the xmlhttprequest specification provides a newer, simpler way to handle form data requests with the formdata object. the formdata object can be used to build form data for transmission, or to get the data within a form element to manage how it's sent. ...
...And 10 more matches

Using Fetch - Web APIs
fetch('https://example.com/profile', { method: 'post', // or 'put' headers: { 'content-type': 'application/json', }, body: json.stringify(data), }) .then(response => response.json()) .then(data => { console.log('success:', data); }) .catch((error) => { console.error('error:', error); }); uploading a file files can be uploaded using an html <input type="file" /> input element, formdata() and fetch(). const formdata = new formdata(); const filefield = document.queryselector('input[type="file"]'); formdata.append('username', 'abc123'); formdata.append('avatar', filefield.files[0]); fetch('https://example.com/profile/avatar', { method: 'put', body: formdata }) .then(response => response.json()) .then(result => { console.log('success:', result); }) .catch(error => { cons...
... 'abc123'); formdata.append('avatar', filefield.files[0]); fetch('https://example.com/profile/avatar', { method: 'put', body: formdata }) .then(response => response.json()) .then(result => { console.log('success:', result); }) .catch(error => { console.error('error:', error); }); uploading multiple files files can be uploaded using an html <input type="file" multiple /> input element, formdata() and fetch(). ...
...atar', filefield.files[0]); fetch('https://example.com/profile/avatar', { method: 'put', body: formdata }) .then(response => response.json()) .then(result => { console.log('success:', result); }) .catch(error => { console.error('error:', error); }); uploading multiple files files can be uploaded using an html <input type="file" multiple /> input element, formdata() and fetch(). ...
...And 6 more matches

Using XMLHttpRequest - Web APIs
r not)."); } note there is no way to be certain, from the information received by the loadend event, as to which condition caused the operation to terminate; however, you can use this to handle tasks that need to be performed in all end-of-transfer scenarios. submitting forms and uploading files instances of xmlhttprequest can be used to submit forms in two ways: using only ajax using the formdata api using the formdata api is the simplest and fastest, but has the disadvantage that data collected can not be stringified. using only ajax is more complex, but typically more flexible and powerful. using nothing but xmlhttprequest submitting forms without the formdata api does not require other apis for most use cases. the only case where you need an additional api is if you want to upload...
...ibly the readasarraybuffer() method of the filereader api. but, since the aim of this script is to work with a stringifiable raw data, we used the sendasbinary() method in conjunction with the readasbinarystring() method of the filereader api. as such, the above script makes sense only when you are dealing with small files. if you do not intend to upload binary content, consider instead using the formdata api. note: the non-standard sendasbinary method is considered deprecated as of gecko 31 (firefox 31 / thunderbird 31 / seamonkey 2.28) and will be removed soon. the standard send(blob data) method can be used instead. using formdata objects the formdata constructor lets you compile a set of key/value pairs to send using xmlhttprequest. its primary use is in sending form data, but can also be u...
... using formdata objects the formdata constructor lets you compile a set of key/value pairs to send using xmlhttprequest. its primary use is in sending form data, but can also be used independently from a form in order to transmit user keyed data. the transmitted data is in the same format the form's submit() method uses to send data, if the form's encoding type were set to "multipart/form-data". formdata objects can be utilized in a number of ways with an xmlhttprequest. for examples, and explanations of how one can utilize formdata with xmlhttprequests, see the using formdata objects page. for didactic purposes here is a translation of the previous example transformed to use the formdata api. note the brevity of the code: <!doctype html> <html> <head> <meta http-equiv="content-type" charset="u...
...And 6 more matches

PasswordCredential.additionalData - Web APIs
it then stores the form object in the additionaldata parameter, before sending it to server in a call to fetch. ...
...it then stores the form object in the additionaldata parameter, before sending it to server in a call to fetch. ...
...it then stores the form object in the additionaldata parameter, before sending it to server in a call to fetch. ...
...And 3 more matches

Uploading and Downloading Files - Archive of obsolete content
h to perform. http file upload some web sites allow one to upload a file. this is done by using an html <input> element using the file type from within a form. when the user selects a file, it can be uploaded to a server. this operation can also be performed via a script using the xmlhttprequest object. ...
... one to upload a file. this is done by using an html <input> element using the file type from within a form. when the user selects a file, it can be uploaded to a server. this operation can also be performed via a script using the xmlhttprequest object. this is a common technique for uploading files as it is compatible with existing servers and formdata interface makes that task fairly simple. ...
...lhttprequest object. this is a common technique for uploading files as it is compatible with existing servers and formdata interface makes that task fairly simple. a formdata object will automatically generate request data with mime type multipart/form-data that existing servers can process. to add a file field to the data you use a file object that an extension can construct from file path. ...
...rmdata interface makes that task fairly simple. a formdata object will automatically generate request data with mime type multipart/form-data that existing servers can process. to add a file field to the data you use a file object that an extension can construct from file path. the formdata object can then simply be passed to xmlhttprequest: function upload(posturl, fieldname, filepath) { var formdata = new formdata(); formdata.append(fieldname, new file(filepath)); var req = new xmlhttprequest(); req.open("post", posturl); req.onload = function(event) { alert(event.target.responsetext); }; req.send(formdata); } http put you can also upload a file using an http put operation. this is simpler but it doesn't allow sending additional data and web servers usually need special configu...

Promises - Archive of obsolete content
uest. let resp = yield new promise((resolve, reject) => { let xhr = new xmlhttprequest; xhr.onload = resolve; xhr.onerror = reject; xhr.open("get", dataurl); xhr.responsetype = "json"; xhr.send(); }); let data = resp.target.response; // use the response to construct form data object for the // second request. let form = new formdata; form.append("id", data.id); form.append("content", data.content); // make the second request. resp = yield new promise((resolve, reject) => { let xhr = new xmlhttprequest; xhr.onload = resolve; xhr.onerror = reject; xhr.open("post", updateurl); xhr.send(form); }); // use the response of the second request. notifyuser(resp.targ...
...yuser(resp.target.responsetext); }); example using promise-based helper the following example relies on the helper function defined below. task.spawn(function* () { // make the initial request. let xhr = yield request(dataurl, { responsetype: "json" }); let data = xhr.response; // use the response to construct form data object for the // second request. let form = new formdata; form.append("id", data.id); form.append("content", data.content); // make the second request. xhr = yield request(updateurl, { data: form }); // use the response of the second request. notifyuser(xhr.responsetext); }); downloading remote files nearly all previous methods of downloading remote files have been superseded by the much simpler downloads.jsm module. the dow...
...ions.method || defaultmethod, url); if (options.responsetype) xhr.responsetype = options.responsetype; for (let header of object.keys(options.headers || {})) xhr.setrequestheader(header, options.headers[header]); let data = options.data; if (data && object.getprototypeof(data).constructor.name == "object") { options.data = new formdata; for (let key of object.keys(data)) options.data.append(key, data[key]); } xhr.send(options.data); }); } example usage: task.spawn(function* () { let request = yield request("http://example.com/", { method: "put", mimetype: "application/json", headers: { "x-species": "hobbit" }, data: { ...

Beacon API - Web APIs
for the next navigation. the beacon api provides a standard way to address these issues. global context the beacon api's navigator.sendbeacon() method is used to send a beacon of data to the server in the global browsing context. the method takes two arguments, the url and the data to send in the request. the data argument is optional and its type may be an arraybufferview, blob, domstring, or formdata. if the browser successfully queues the request for delivery, the method returns "true" and returns "false" otherwise. worker context the beacon api's navigator.sendbeacon() method is used to send a beacon of data to the server from the worker global scope. the method takes two arguments, the url and the data to send in the request. the data argument is optional and its type may be an arraybuff...
...y queues the request for delivery, the method returns "true" and returns "false" otherwise. worker context the beacon api's navigator.sendbeacon() method is used to send a beacon of data to the server from the worker global scope. the method takes two arguments, the url and the data to send in the request. the data argument is optional and its type may be an arraybufferview, blob, domstring, or formdata. if the browser successfully queues the request for delivery, the method returns "true" and otherwise returns "false". ...

Request - Web APIs
as been used in a response yet. methods request.clone() creates a copy of the current request object. request implements body, so it also has the following methods available to it: body.arraybuffer() returns a promise that resolves with an arraybuffer representation of the request body. body.blob() returns a promise that resolves with a blob representation of the request body. body.formdata() returns a promise that resolves with a formdata representation of the request body. body.json() returns a promise that resolves with a json representation of the request body. body.text() returns a promise that resolves with an usvstring (text) representation of the request body. note: the body functions can be run only once; subsequent calls will resolve with empty strings/arraybuffers...
... you could then fetch this api request by passing the request object in as a parameter to a windoworworkerglobalscope.fetch() call, for example and get the response: fetch(request) .then(response => { if (response.status === 200) { return response.json();...

Using Promises - JavaScript
result3) */ timing to avoid surprises, functions passed to then() will never be called synchronously, even with an already-res...
...result3) */ timing to avoid surprises, functions passed to then() will never be called synchronously, even with an already-resolved promise: promise.resolve().then(() => console.log(2)); conso...

Web forms — Working with user data - Learn web development
is article explains how you'd do this and the considerations you need to be aware of when doing so, with a practical case study. sending forms through javascript this article looks at ways to use a form to assemble an http request and send it via custom javascript, rather than standard form submission. it also looks at why you'd want to do this, and the implications of doing so. (see also using formdata objects.) css property compatibility table for form controls this last article provides a handy reference allowing you to look up what css properties are compatible with what form elements. ...

Using the Beacon API - Web APIs
page unloads. this document contains examples of the beacon interfaces. see beacon api for an overview. navigator.sendbeacon() the beacon api's navigator.sendbeacon() method sends a beacon request to the server in the global browsing context. the method takes two arguments: the url and the data to send. the data argument is optional and its type may be an arraybufferview, blob, domstring, or formdata. if the browser successfully queues the request for delivery, the method returns true and returns false otherwise. the following example specifies a handler for the load and beforeunload events. the handler calls sendbeacon() with the current url. window.onload = window.onunload = function analytics(event) { if (!navigator.sendbeacon) return; var url = "https://example.com/analytics"; /...

Body - Web APIs
used to expose a readablestream of the body contents. body.bodyused read only a boolean that indicates whether the body has been read. methods body.arraybuffer() takes a response stream and reads it to completion. it returns a promise that resolves with an arraybuffer. body.blob() takes a response stream and reads it to completion. it returns a promise that resolves with a blob. body.formdata() takes a response stream and reads it to completion. it returns a promise that resolves with a formdata object. body.json() takes a response stream and reads it to completion. it returns a promise that resolves with the result of parsing the body text as json. body.text() takes a response stream and reads it to completion. it returns a promise that resolves with a usvstring (text). the resp...

Document - Web APIs
aised. globaleventhandlers.ondurationchange is an eventhandler representing the code to be called when the durationchange event is raised. globaleventhandlers.onemptied is an eventhandler representing the code to be called when the emptied event is raised. globaleventhandlers.onended is an eventhandler representing the code to be called when the ended event is raised. globaleventhandlers.onformdata is an eventhandler for processing formdata events, fired after the entry list representing the form's data is constructed. globaleventhandlers.ongotpointercapture is an eventhandler representing the code to be called when the gotpointercapture event type is raised. globaleventhandlers.oninput is an eventhandler representing the code to be called when the input event is raised. globaleventha...

Using files from web applications - Web APIs
le']['tmp_name'], "uploads/" . $_files['myfile']['name']); exit; } ?><!doctype html> <html> <head> <title>dnd binary upload</title> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <script type="application/javascript"> function sendfile(file) { const uri = "/index.php"; const xhr = new xmlhttprequest(); const fd = new formdata(); xhr.open("post", uri, true); xhr.onreadystatechange = function() { if (xhr.readystate == 4 && xhr.status == 200) { alert(xhr.responsetext); // handle response. } }; fd.append('myfile', file); // initiate a multipart/form-data upload xhr.send(fd); } windo...

GlobalEventHandlers - Web APIs
aised. globaleventhandlers.ondurationchange is an eventhandler representing the code to be called when the durationchange event is raised. globaleventhandlers.onemptied is an eventhandler representing the code to be called when the emptied event is raised. globaleventhandlers.onended is an eventhandler representing the code to be called when the ended event is raised. globaleventhandlers.onformdata is an eventhandler for processing formdata events, fired after the entry list representing the form's data is constructed. globaleventhandlers.ongotpointercapture is an eventhandler representing the code to be called when the gotpointercapture event type is raised. globaleventhandlers.oninput is an eventhandler representing the code to be called when the input event is raised. globaleventha...

HTMLFormElement - Web APIs
ich have an autofill field name value that is not off or on. the form will receive an event once the user has finished with the interface, the event will either be autocomplete when the fields have been filled or autocompleteerror when there was a problem. events listen to these events using addeventlistener(), or by assigning an event listener to the oneventname property of this interface. formdata the formdata event fires after the entry list representing the form's data is constructed. also available via the onformdata property. reset the reset event fires when a form is reset. also available via the onreset property. submit the submit event fires when a form is submitted. also available via the onsubmit property. usage notes obtaining a form element object to obtain an htmlfo...

The HTML DOM API - Web APIs
ptions. barprop navigator window deprecated web app and browser integration interfaces external obsolete web app and browser integration interfaces applicationcache plugin pluginarray form support interfaces these interfaces provide structure and functionality required by the elements used to create and manage forms, including the <form> and <input> elements. formdataevent htmlformcontrolscollection htmloptionscollection radionodelist validitystate canvas and image interfaces these interfaces represent objects used by the canvas api as well as the <img> element and <picture> elements. canvasgradient canvaspattern canvasrenderingcontext2d imagebitmap imagebitmaprenderingcontext imagedata offscreencanvas offscreencanvasrenderingcontext2d path...

Navigator.sendBeacon() - Web APIs
return values the sendbeacon() method returns true if the user agent successfully queued the data for transfer. otherwise, it returns false. ...

PasswordCredential - Web APIs
class may be passed in the credential member of the init object for global fetch. note: this interface is restricted to top-level contexts and cannot be used from an <iframe>. constructor passwordcredential()secure context creates a new passwordcredential object. properties inherits properties from its ancestor, credential. passwordcredential.additionaldata secure context one of a formdata instance, a urlsearchparams instance, or null. the data in the objects will be added to the request body and sent to the remote endpoint with the credentials. passwordcredential.iconurl read only secure context a usvstring containing a url pointing to an image for an icon. this image is intended for display in a credential chooser. the url must be accessible without authentication. passwordcre...

Request() - Web APIs
ons object containing any custom settings that you want to apply to the request. the possible options are: method: the request method, e.g., get, post. the default is get. headers: any headers you want to add to your request, contained within a headers object or an object literal with bytestring values. body: any body that you want to add to your request: this can be a blob, buffersource, formdata, urlsearchparams, usvstring, or readablestream object. note that a request using the get or head method cannot have a body. mode: the mode you want to use for the request, e.g., cors, no-cors, same-origin, or navigate. the default is cors. credentials: the request credentials you want to use for the request: omit, same-origin, or include. the default is same-origin. cache: the cache mode yo...

Response() - Web APIs
the response() constructor creates a new response object. syntax var myresponse = new response(body, init); parameters body optional an object defining a body for the response. this can be null (which is the default value), or one of: blob buffersource formdata readablestream urlsearchparams usvstring init optional an options object containing any custom settings that you want to apply to the response, or an empty object (which is the default value). the possible options are: status: the status code for the reponse, e.g., 200. statustext: the status message associated with the status code, e.g., ok. headers: any headers you want to add to your response, contained within a headers object or object literal of bytestring key/value pairs (see http headers for a refe...

Response - Web APIs
eates a new response with a different url. body interface methods response implements body, so it also has the following methods available to it: body.arraybuffer() takes a response stream and reads it to completion. it returns a promise that resolves with an arraybuffer. body.blob() takes a response stream and reads it to completion. it returns a promise that resolves with a blob. body.formdata() takes a response stream and reads it to completion. it returns a promise that resolves with a formdata object. body.json() takes a response stream and reads it to completion. it returns a promise that resolves with the result of parsing the body text as json. body.text() takes a response stream and reads it to completion. it returns a promise that resolves with a usvstring (text). exampl...

Functions and classes available to Web Workers - Web APIs
h a few features are later.) no support 42 41 behind pref 10.1 filereader this api allows asynchronous read of blob and file objects. 46 (46) no support (yes) no support filereadersync this api allows synchronous read of blob and file objects. this is an api that works only in workers. 8 (8) no support no support no support formdata formdata objects provide a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using the xmlhttprequest send() method. ? (should be in 39 (39)) ? (yes) ? imagedata the underlying pixel data of an area of a canvas element. manipulating such data can be a complex task better suited to be delegated to a ...

WindowOrWorkerGlobalScope.fetch() - Web APIs
igin header is not set on fetch requests with a method of head or get. (this behavior was corrected in firefox 65 — see bug 1508661). headers any headers you want to add to your request, contained within a headers object or an object literal with bytestring values. note that some names are forbidden. body any body that you want to add to your request: this can be a blob, buffersource, formdata, urlsearchparams, usvstring, or readablestream object. note that a request using the get or head method cannot have a body. mode the mode you want to use for the request, e.g., cors, no-cors, or same-origin. credentials the request credentials you want to use for the request: omit, same-origin, or include. to automatically send cookies for the current domain, this option must be provided.

XMLHttpRequest.send() - Web APIs
ull. if no accept header has been set using the setrequestheader(), an accept header with the type "*/*" (any type) is sent. syntax xmlhttprequest.send(body) parameters body optional a body of data to be sent in the xhr request. this can be: a document, in which case it is serialized before being sent. an xmlhttprequestbodyinit, which per the fetch spec can be a blob, buffersource, formdata, urlsearchparams, or usvstring object. null if no value is specified for the body, a default value of null is used. the best way to send binary content (e.g. in file uploads) is by using an arraybufferview or blob in conjunction with the send() method. return value undefined. exceptions exception description invalidstateerror send() has already been invoked ...

Web APIs
vent extendablemessageevent f featurepolicy federatedcredential fetchevent file fileentrysync fileerror fileexception filelist filereader filereadersync filerequest filesystem filesystemdirectoryentry filesystemdirectoryreader filesystementry filesystementrysync filesystemfileentry filesystemflags filesystemsync focusevent fontface fontfaceset fontfacesetloadevent formdata formdataentryvalue formdataevent fullscreenoptions g gainnode gamepad gamepadbutton gamepadevent gamepadhapticactuator geolocation geolocationcoordinates geolocationposition geolocationpositionerror geometryutils gestureevent globaleventhandlers gyroscope h htmlanchorelement htmlareaelement htmlaudioelement htmlbrelement htmlbaseelement htmlbasefontelement htmlbodyelement htmlbuttonel...

Basic form hints - Accessibility
for more guidance on using aria for forms accessibility, see the wai-aria authoring practices document. ...

Ajax - Developer guides
s you through the ajax basics and gives you two simple hands-on examples to get you started. using the xmlhttprequest api the xmlhttprequest api is the core of ajax. this article will explain how to use some ajax techniques, like: analyzing and manipulating the response of the server monitoring the progress of a request submitting forms and upload binary files – in pure ajax, or using formdata objects using ajax within web workers fetch api the fetch api provides an interface for fetching resources. it will seem familiar to anyone who has used xmlhttprequest, but this api provides a more powerful and flexible feature set. server-sent events traditionally, a web page has to send a request to the server to receive new data; that is, the page requests data from the server. with ...

Developer guides
free for anyone to use on the web. unicode bidirectional text algorithm (bidi) the unicode® bidi algorithm is part of the unicode text standard. it describes how the browser should order characters while rendering unicode text. this guide covers the algorithm in general and how it applies to content you create—especially when you build properly localized and internationalized content. using formdata objects the formdata object lets you compile a set of key/value pairs to send using xmlhttprequest. it's primarily intended for sending form data, but can be used independently from forms to transmit keyed data. the transmission is in the same format that the form's submit() method would use to send the data if the form's encoding type were set to "multipart/form-data". user input and controls ...

<input type="image"> - HTML: Hypertext Markup Language
so available on <input type="submit"> and <button> elements. formenctype a string that identifies the encoding method to use when submitting the form data to the server. there are three permitted values: application/x-www-form-urlencoded this, the default value, sends the form data as a string after url encoding the text using an algorithm such as encodeuri(). multipart/form-data uses the formdata api to manage the data, allowing for files to be submitted to the server. you must use this encoding type if your form includes any <input> elements of type file (<input type="file">). text/plain plain text; mostly useful only for debugging, so you can easily see the data that's to be submitted. if specified, the value of the formenctype attribute overrides the owning form's action attribute.

<input type="radio"> - HTML: Hypertext Markup Language
additional attributes in addition to the common attributes shared by all <input> elements, radio inputs support the followi...

<input type="submit"> - HTML: Hypertext Markup Language
lso available on <input type="image"> and <button> elements. formenctype a string that identifies the encoding method to use when submitting the form data to the server. there are three permitted values: application/x-www-form-urlencoded this, the default value, sends the form data as a string after url encoding the text using an algorithm such as encodeuri(). multipart/form-data uses the formdata api to manage the data, allowing for files to be submitted to the server. you must use this encoding type if your form includes any <input> elements of type file (<input type="file">). text/plain plain text; mostly useful only for debugging, so you can easily see the data that's to be submitted. if specified, the value of the formenctype attribute overrides the owning form's action attribute.

MIME types (IANA media types) - HTTP
le messages. examples include message/rfc822 (for forwarded or replied-to message quoting) and message/partial to allow breaking a large message into smaller ones automatically to be reassembled by the recipient. multipart list at iana data that is comprised of multiple components which may individually have different mime types. examples include multipart/form-data (for data produced using the formdata api) and multipart/byteranges (defined in rfc 7233: 5.4.1 and used with http's 206 "partial content" response returned when the fetched data is only part of the content, such as is delivered using the range header). important mime types for web developers application/octet-stream this is the default for binary files. as it means unknown binary file, browsers usually don't execute it, or even ...