ajax: do not clutter global

assets/javascripts/lib/ajax.js

@@ -20,32 +20,16 @@ function ajax(options) {
   } else {
     return parseResponse(xhr, options);
   }
-}
 
-ajax.defaults = {
-  async: true,
-  dataType: "json",
-  timeout: 30,
-  type: "GET",
-};
-// contentType
-// context
-// data
-// error
-// headers
-// progress
-// success
-// url
-
-var applyDefaults = function (options) {
+  function applyDefaults(options) {
     for (var key in ajax.defaults) {
       if (options[key] == null) {
         options[key] = ajax.defaults[key];
       }
     }
-};
+  }
 
-var serializeData = function (options) {
+  function serializeData(options) {
     if (!options.data) {
       return;
     }
@@ -56,17 +40,18 @@ var serializeData = function (options) {
     } else {
       options.data = serializeParams(options.data);
     }
-};
+  }
 
-var serializeParams = (params) =>
-  Object.entries(params)
+  function serializeParams(params) {
+    return Object.entries(params)
       .map(
         ([key, value]) =>
           `${encodeURIComponent(key)}=${encodeURIComponent(value)}`,
       )
       .join("&");
+  }
 
-var applyCallbacks = function (xhr, options) {
+  function applyCallbacks(xhr, options) {
     if (!options.async) {
       return;
     }
@@ -84,9 +69,9 @@ var applyCallbacks = function (xhr, options) {
         onComplete(xhr, options);
       }
     };
-};
+  }
 
-var applyHeaders = function (xhr, options) {
+  function applyHeaders(xhr, options) {
     if (!options.headers) {
       options.headers = {};
     }
@@ -112,9 +97,9 @@ var applyHeaders = function (xhr, options) {
       var value = options.headers[key];
       xhr.setRequestHeader(key, value);
     }
-};
+  }
 
-var onComplete = function (xhr, options) {
+  function onComplete(xhr, options) {
     if (200 <= xhr.status && xhr.status < 300) {
       let response;
       if ((response = parseResponse(xhr, options)) != null) {
@@ -125,41 +110,57 @@ var onComplete = function (xhr, options) {
     } else {
       onError("error", xhr, options);
     }
-};
+  }
 
-var onSuccess = function (response, xhr, options) {
+  function onSuccess(response, xhr, options) {
     if (options.success != null) {
       options.success.call(options.context, response, xhr, options);
     }
-};
+  }
 
-var onError = function (type, xhr, options) {
+  function onError(type, xhr, options) {
     if (options.error != null) {
       options.error.call(options.context, type, xhr, options);
     }
-};
+  }
 
-var onTimeout = function (xhr, options) {
+  function onTimeout(xhr, options) {
     xhr.abort();
     onError("timeout", xhr, options);
-};
+  }
 
-var abort = function (xhr) {
+  function abort(xhr) {
     clearTimeout(xhr.timer);
     xhr.onreadystatechange = null;
     xhr.abort();
-};
+  }
 
-var parseResponse = function (xhr, options) {
+  function parseResponse(xhr, options) {
     if (options.dataType === "json") {
       return parseJSON(xhr.responseText);
     } else {
       return xhr.responseText;
     }
-};
+  }
 
-var parseJSON = function (json) {
+  function parseJSON(json) {
     try {
       return JSON.parse(json);
     } catch (error) {}
+  }
+}
+
+ajax.defaults = {
+  async: true,
+  dataType: "json",
+  timeout: 30,
+  type: "GET",
+  // contentType
+  // context
+  // data
+  // error
+  // headers
+  // progress
+  // success
+  // url
 };