Update FormData.scala

Author: G-yhlee

dom/src/main/scala/org/scalajs/dom/FormData.scala

@@ -8,17 +8,48 @@ package org.scalajs.dom
 
 import scala.scalajs.js
 import scala.scalajs.js.annotation._
+import scala.scalajs.js.|
 
 /** XMLHttpRequest Level 2 adds support for the new FormData interface. 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.
   */
 @js.native
 @JSGlobal
-class FormData(form: HTMLFormElement = js.native) extends js.Object {
+class FormData(form: HTMLFormElement = js.native) extends js.Iterable[js.Tuple2[String, String]] {
 
   /** Appends a key/value pair to the FormData object. */
   def append(name: js.Any, value: js.Any, blobName: String = js.native): Unit = js.native
+
+  /** Deletes a key/value pair from the FormData object. */
+  def delete(name: String): Unit = js.native
+
+  /** Returns the first value associated with a given key from within a FormData object. */
+  def get(name: String): String | Blob = js.native
+
+  /** Returns whether a FormData object contains a certain key. */
+  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.
+    */
+  def set(
+      name: String, value: String | Blob, blobName: String = js.native
+  ): Unit = js.native
+
+  @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. */
+  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. */
+  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. */
+  def keys(): js.Iterator[String] = js.native
+
+  /** Returns an iterator that iterates through all values contained in the FormData. */
+  def values(): js.Iterator[String | Blob] = js.native
 }
 
 @js.native