chore: rename all JS files to TS files (#6297)

core/interfaces/i_delete_area.ts

@@ -0,0 +1,50 @@
+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @fileoverview The interface for a component that can delete a block or bubble
+ * that is dropped on top of it.
+ */
+
+'use strict';
+
+/**
+ * The interface for a component that can delete a block or bubble
+ * that is dropped on top of it.
+ * @namespace Blockly.IDeleteArea
+ */
+goog.module('Blockly.IDeleteArea');
+
+/* eslint-disable-next-line no-unused-vars */
+const {IDragTarget} = goog.require('Blockly.IDragTarget');
+/* eslint-disable-next-line no-unused-vars */
+const {IDraggable} = goog.requireType('Blockly.IDraggable');
+
+
+/**
+ * Interface for a component that can delete a block or bubble that is dropped
+ * on top of it.
+ * @extends {IDragTarget}
+ * @interface
+ * @alias Blockly.IDeleteArea
+ */
+const IDeleteArea = function() {};
+
+/**
+ * Returns whether the provided block or bubble would be deleted if dropped on
+ * this area.
+ * This method should check if the element is deletable and is always called
+ * before onDragEnter/onDragOver/onDragExit.
+ * @param {!IDraggable} element The block or bubble currently being
+ *   dragged.
+ * @param {boolean} couldConnect Whether the element could could connect to
+ *     another.
+ * @return {boolean} Whether the element provided would be deleted if dropped on
+ *     this area.
+ */
+IDeleteArea.prototype.wouldDelete;
+
+exports.IDeleteArea = IDeleteArea;