Introduction

README.md

@@ -25,6 +25,7 @@ Examples:
 
 ## <a id="contents"></a> [≡](#contents) [▶](https://calmm-js.github.io/karet.xhr/index.html#contents) Contents
 
+* [Introduction](#introduction)
 * [Reference](#reference)
   * [Convenience](#convenience)
     * [`XHR.getJson(url | {url[, ...]}) ~> varies`](#XHR-getJson)
@@ -72,7 +73,12 @@ Examples:
   * [Auxiliary](#auxiliary)
     * [`XHR.isHttpSuccess(number) ~> boolean`](#XHR-isHttpSuccess)
 
-## <a id="reference"></a> [≡](#contents) [▶](https://calmm-js.github.io/karet.xhr/index.html#reference) Reference
+## <a id="introduction"></a> [≡](#contents) [▶](https://calmm-js.github.io/karet.xhr/index.html#introduction) [Introduction](#introduction)
+
+To-Be-Done
+
+## <a id="reference"></a> [≡](#contents) [▶](https://calmm-js.github.io/karet.xhr/index.html#reference) [Reference](#reference)
+
 
 The interface of this library consists of named exports.  Typically one just
 imports the library as: