Interface FormDataAddon

formData

• formData<T, C, R>(this, formObject, recursive?): this

• Converts the javascript object to a FormData and sets the request body.

  const form = {
    hello: "world",
    duck: "Muscovy",
  };
  
  wretch("...").addons(FormDataAddon).formData(form).post();
  Copy

  The recursive argument when set to true will enable recursion through all nested objects and produce object[key] keys. It can be set to an array of string to exclude specific keys.

  Warning: Be careful to exclude Blob instances in the Browser, and ReadableStream and Buffer instances when using the node.js compatible form-data package.

  const form = {
    duck: "Muscovy",
    duckProperties: {
      beak: {
        color: "yellow",
      },
      legs: 2,
    },
    ignored: {
      key: 0,
    },
  };
  
  // Will append the following keys to the FormData payload:
  // "duck", "duckProperties[beak][color]", "duckProperties[legs]"
  wretch("...").addons(FormDataAddon).formData(form, ["ignored"]).post();
  Copy

  Note: This addon does not support specifying a custom filename. If you need to do so, you can use the body method directly:

  const form = new FormData();
  form.append("hello", "world", "hello.txt");
  wretch("...").body(form).post();
  Copy

  See: https://developer.mozilla.org/en-US/docs/Web/API/FormData/append#example

  Type Parameters

  • T extends FormDataAddon
  • C
  • R

  Parameters

  • this: T & Wretch<T, C, R>
  • formObject: object

    An object which will be converted to a FormData
  • Optionalrecursive: boolean | string[]

    If true, will recurse through all nested objects. Can be set as an array of string to exclude specific keys.

  Returns this