Can I append an array to formdata in javascript

Question

I m using FormData to upload files  I also want to send an array of other data    When I send just the image  it works fine  When I append some text to the formdata  it works fine  When I try to attach the  tags  array below  everything else works fine but no array is sent   Any known issues with FormData and appending arrays   Instantiate formData   formdata   new FormData     The array I create  Console log shows everything working fine              Get the tags         tags   new Array                tag-form   each function i               article     this  find  input name  article     val                gender     this  find  input name  gender     val                brand     this  find  input name  brand     val                this tag   new Array                this tag article   article              this tag gender   gender              this tag brand   brand              tags push this tag                   console log  This is tags array                  console log tags                       formdata append  tags   tags           console log  This is formdata              console log formdata     How I send it               Send to server           ajax               url         build ajaxes upload-photo php               type   POST               data  formdata              processData  false              contentType  false              success  function  response                    console log response                     fancybox close

User · Answer

Writing as   var formData   new FormData  var array     1    2    for  var i   0  i  lt  array length  i          formData append  array php side     array i        you can receive just as normal array post get by php

User · Answer

We can simply do like this   x000D   x000D  formData   new FormData  words     apple    ball    cat   words forEach  item    gt  formData append  words     item       verify the data console log formData getAll  words          apple    ball    cat   x000D   x000D   x000D   On server-side you will get words     quot apple quot    quot ball quot    quot cat quot

User · Answer

var formData   new FormData  var alphaArray     A    B    C   D   E    for  var i   0  i  lt  alphaArray length  i          formData append  listOfAlphabet   alphaArray  i        And In your request you will get array of alphabets

User · Answer

Function  function appendArray form data  values  name       if  values  amp  amp  name          form data append name           else          if typeof values     object                for key in values                   if typeof values key      object                       appendArray form data  values key   name         key                         else                     form data append name         key        values key                           else             form data append name  values              return form data     Use  var form   document createElement  form      or document getElementById  my form id    var formdata   new FormData form    appendArray formdata        sefgusyg            sujyfgsujyfsg   srkisgfisfsgsrg              test1  5      test2  6      test3  8      test4  3      test5             sejyfgjy            isdyfgusygf

User · Answer

use  xxx    as name of the field in formdata  you will get an array of - stringified objects - in you case    so within your loop      tag-form   each function i               article     this  find  input name  article     val                gender     this  find  input name  gender     val                brand     this  find  input name  brand     val                this tag   new Array                this tag article   article              this tag gender   gender              this tag brand   brand                tags push this tag                   formdata append  tags     this tag

User · Answer

You can only stringify the array and append it  Sends the array as an actual Array even if it has only one item   const array     1  2    let formData   new FormData    formData append  numbers   JSON stringify array

User · Answer

var formData   new FormData  var arr     item1    item2    item3     arr forEach item   gt        formData append           quot myFile quot  item

User · Answer

I m sending files array  using formData in vuejs  for me below code is working          if this requiredDocumentForUploads length  gt  0                this requiredDocumentForUploads forEach file   gt                    var name   file attachment type     attachment type is using for naming                 if document querySelector  quot  name  quot    name    quot   quot   files length  gt  0                        formData append  quot requiredDocumentForUploadsNew  quot    name    quot   quot   document querySelector  quot  name  quot    name    quot   quot   files 0

User · Answer

Simply you can do like this   var formData   new FormData    formData append  array key1    this array key1   formData append  array key2    this array key2

User · Answer

How about this   formdata append  tags   JSON stringify tags          and  correspondingly  using json decode on server to deparse it  See  the second value of FormData append can be        a Blob  File  or a string  if neither  the value is converted to a   string   The way I see it  your tags array contains objects   Musa is right  btw  making this tag an Array  then assigning string properties to it makes no sense  use plain object instead   so native conversion  with toString    won t be enough  JSON ing should get the info through  though   As a sidenote  I d rewrite the property assigning block just into this   tags push  article  article  gender  gender  brand  brand

User · Answer

This works for me when I sent file   text   array   const uploadData   new FormData    if  isArray value       const k      key        uploadData append k  value     else     uploadData append key  value       const headers        Content-Type    multipart form-data

[javascript] Can I append an array to 'formdata' in javascript?

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