diff --git a/dom/src/main/scala/org/scalajs/dom/FormData.scala b/dom/src/main/scala/org/scalajs/dom/FormData.scala
index 6ebf1e7ff..be89204a6 100644
--- a/dom/src/main/scala/org/scalajs/dom/FormData.scala
+++ b/dom/src/main/scala/org/scalajs/dom/FormData.scala
@@ -18,26 +18,76 @@ import scala.scalajs.js.|
 @JSGlobal
 class FormData(form: HTMLFormElement = js.native) extends js.Iterable[js.Tuple2[String, String]] {
 
-  /** Appends a key/value pair to the FormData object. */
+  /** The `append()` method of the `FormData` interface appends a new value onto an existing key inside a `FormData`
+    * object, or adds the key if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value. This can be a string or `Blob` (including subclasses such as File). If none of these are
+    *   specified the value is converted to a string.
+    */
   def append(name: js.Any, value: String): Unit = js.native
 
+  /** The `append()` method of the `FormData` interface appends a new value onto an existing key inside a `FormData`
+    * object, or adds the key if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value. This can be a string or `Blob` (including subclasses such as File). If none of these are
+    *   specified the value is converted to a string.
+    * @param blobName
+    *   The filename reported to the server (a string), when a `Blob` or `File` is passed as the second parameter. The
+    *   default filename for `Blob` objects is "blob". The default filename for `File` objects is the file's filename.
+    */
   def append(name: js.Any, value: Blob, blobName: String): Unit = js.native
 
-  /** Deletes a key/value pair from the FormData object. */
+  /** The `delete()` method of the `FormData` interface deletes a key and its value(s) from a `FormData` object.
+    * @param name
+    *   The name of the key you want to delete.
+    */
   def delete(name: String): Unit = js.native
 
-  /** Returns the first value associated with a given key from within a FormData object. */
+  /** The `get()` method of the `FormData` interface returns the first value associated with a given key from within a
+    * `FormData` object. If you expect multiple values and want all of them, use the `getAll()` method instead.
+    *
+    * @param name
+    *   A string representing the name of the key you want to retrieve.
+    * @return
+    *   A value whose key matches the specified name. Otherwise, `null`.
+    */
   def get(name: String): String | Blob = js.native
 
-  /** Returns whether a FormData object contains a certain key. */
+  /** The `has()` method of the `FormData` interface returns whether a `FormData` object contains a certain key.
+    *
+    * @param name
+    *   A string representing the name of the key you want to test for.
+    * @return
+    *   `true` if a key of `FormData` matches the specified name. Otherwise, `false`.
+    */
   def has(name: String): Boolean = js.native
 
-  /** Sets a new value for an existing key inside a FormData object, or adds the key/value if it does not already exist.
+  /** The `set()` method of the `FormData` interface sets a new value for an existing key inside a `FormData` object, or
+    * adds the key/value if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value.
     */
   def set(
       name: String, value: String
   ): Unit = js.native
 
+  /** The `set()` method of the `FormData` interface sets a new value for an existing key inside a `FormData` object, or
+    * adds the key/value if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value.
+    */
   def set(
       name: String, value: Blob, blobName: String
   ): Unit = js.native
@@ -45,16 +95,24 @@ class FormData(form: HTMLFormElement = js.native) extends js.Iterable[js.Tuple2[
   @JSName(js.Symbol.iterator)
   override def jsIterator(): js.Iterator[js.Tuple2[String, String]] = js.native
 
-  /** Returns an iterator that iterates through all key/value pairs contained in the FormData. */
+  /** The `FormData.entries()` method returns an iterator which iterates through all key/value pairs contained in the
+    * `FormData`. The key of each pair is a string object, and the value is either a string or a `Blob`.
+    */
   def entries(): js.Iterator[js.Tuple2[String, String | Blob]] = js.native
 
-  /** Returns an array of all the values associated with a given key from within a FormData. */
+  /** The `getAll()` method of the `FormData` interface returns all the values associated with a given key from within a
+    * `FormData` object.
+    */
   def getAll(name: String): js.Array[String | Blob] = js.native
 
-  /** Returns an iterator iterates through all keys of the key/value pairs contained in the FormData. */
+  /** The `FormData.keys()` method returns an iterator which iterates through all keys contained in the `FormData`. The
+    * keys are strings.
+    */
   def keys(): js.Iterator[String] = js.native
 
-  /** Returns an iterator that iterates through all values contained in the FormData. */
+  /** The `FormData.values()` method returns an iterator which iterates through all values contained in the `FormData`.
+    * The values are strings or `Blob` objects.
+    */
   def values(): js.Iterator[String | Blob] = js.native
 }