Optimization

3 files changed, 65 insertions, 116 deletions

diff --git a/ext/bg/js/templates.js b/ext/bg/js/templates.js
index b2fc0651..54033197 100644
--- a/ext/bg/js/templates.js
+++ b/ext/bg/js/templates.js
@@ -21,49 +21,39 @@ templates['kanji.html'] = template({"1":function(container,depth0,helpers,partia
 
   return ((stack1 = helpers["if"].call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.enableAnkiConnect : depth0),{"name":"if","hash":{},"fn":container.program(2, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "");
 },"2":function(container,depth0,helpers,partials,data,blockParams,depths) {
-    var stack1;
-
-  return "    <div class=\"action-bar\">\n"
-    + ((stack1 = helpers["with"].call(depth0 != null ? depth0 : {},(depths[1] != null ? depths[1].addable : depths[1]),{"name":"with","hash":{},"fn":container.program(3, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "    </div>\n";
-},"3":function(container,depth0,helpers,partials,data,blockParams,depths) {
-    var stack1, helper, alias1=depth0 != null ? depth0 : {}, alias2=container.escapeExpression;
+    var helper, alias1=container.escapeExpression;
 
-  return "        <a href=\"#\" title=\"Add Kanji\" class=\"action-link "
-    + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.kanji : depth0),{"name":"unless","hash":{},"fn":container.program(4, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "\" data-mode=\"kanji\" data-index=\""
-    + alias2(((helper = (helper = helpers.index || (data && data.index)) != null ? helper : helpers.helperMissing),(typeof helper === "function" ? helper.call(alias1,{"name":"index","hash":{},"data":data}) : helper)))
+  return "    <a href=\"#\" title=\"Add Kanji\" class=\"action-link disabled\" data-mode=\"kanji\" data-index=\""
+    + alias1(((helper = (helper = helpers.index || (data && data.index)) != null ? helper : helpers.helperMissing),(typeof helper === "function" ? helper.call(depth0 != null ? depth0 : {},{"name":"index","hash":{},"data":data}) : helper)))
     + "\"><img src=\""
-    + alias2(container.lambda((depths[2] != null ? depths[2].root : depths[2]), depth0))
+    + alias1(container.lambda((depths[1] != null ? depths[1].root : depths[1]), depth0))
     + "/add_kanji.png\"></a>\n";
 },"4":function(container,depth0,helpers,partials,data) {
-    return "disabled";
-},"6":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "            <dt>Meanings</dt>\n            <dd>\n"
-    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.glossary : depth0),{"name":"each","hash":{},"fn":container.program(7, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.glossary : depth0),{"name":"each","hash":{},"fn":container.program(5, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "            </dd>\n";
-},"7":function(container,depth0,helpers,partials,data) {
+},"5":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "                "
     + container.escapeExpression(container.lambda(depth0, depth0))
-    + ((stack1 = helpers.unless.call(depth0 != null ? depth0 : {},(data && data.last),{"name":"unless","hash":{},"fn":container.program(8, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.unless.call(depth0 != null ? depth0 : {},(data && data.last),{"name":"unless","hash":{},"fn":container.program(6, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n";
-},"8":function(container,depth0,helpers,partials,data) {
+},"6":function(container,depth0,helpers,partials,data) {
     return ", ";
-},"10":function(container,depth0,helpers,partials,data) {
+},"8":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "            <dt>Kunyomi</dt>\n            <dd>\n"
-    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.kunyomi : depth0),{"name":"each","hash":{},"fn":container.program(7, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.kunyomi : depth0),{"name":"each","hash":{},"fn":container.program(5, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "            </dd>\n";
-},"12":function(container,depth0,helpers,partials,data) {
+},"10":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "            <dt>Onyomi</dt>\n            <dd>\n"
-    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.onyomi : depth0),{"name":"each","hash":{},"fn":container.program(7, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.onyomi : depth0),{"name":"each","hash":{},"fn":container.program(5, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "            </dd>\n";
 },"compiler":[7,">= 4.0.0"],"main":function(container,depth0,helpers,partials,data,blockParams,depths) {
     var stack1, helper, alias1=depth0 != null ? depth0 : {};
@@ -73,11 +63,11 @@ templates['kanji.html'] = template({"1":function(container,depth0,helpers,partia
     + "\n    <div class=\"kanji-glyph\">"
     + container.escapeExpression(((helper = (helper = helpers.character || (depth0 != null ? depth0.character : depth0)) != null ? helper : helpers.helperMissing),(typeof helper === "function" ? helper.call(alias1,{"name":"character","hash":{},"data":data}) : helper)))
     + "</div>\n\n    <div class=\"kanji-info\">\n        <dl>\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.glossary : depth0),{"name":"if","hash":{},"fn":container.program(6, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.glossary : depth0),{"name":"if","hash":{},"fn":container.program(4, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.kunyomi : depth0),{"name":"if","hash":{},"fn":container.program(10, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.kunyomi : depth0),{"name":"if","hash":{},"fn":container.program(8, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.onyomi : depth0),{"name":"if","hash":{},"fn":container.program(12, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.onyomi : depth0),{"name":"if","hash":{},"fn":container.program(10, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "        </dl>\n    </div>\n</div>\n</div>\n";
 },"useData":true,"useDepths":true});
 templates['kanji-link.html'] = template({"compiler":[7,">= 4.0.0"],"main":function(container,depth0,helpers,partials,data) {
@@ -103,72 +93,60 @@ templates['term.html'] = template({"1":function(container,depth0,helpers,partial
 
   return ((stack1 = helpers["if"].call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.enableAnkiConnect : depth0),{"name":"if","hash":{},"fn":container.program(2, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "");
 },"2":function(container,depth0,helpers,partials,data,blockParams,depths) {
-    var stack1;
-
-  return "    <div class=\"action-bar\">\n"
-    + ((stack1 = helpers["with"].call(depth0 != null ? depth0 : {},(depths[1] != null ? depths[1].addable : depths[1]),{"name":"with","hash":{},"fn":container.program(3, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "    </div>\n";
-},"3":function(container,depth0,helpers,partials,data,blockParams,depths) {
-    var stack1, helper, alias1=depth0 != null ? depth0 : {}, alias2=helpers.helperMissing, alias3="function", alias4=container.escapeExpression, alias5=container.lambda;
+    var helper, alias1=depth0 != null ? depth0 : {}, alias2=helpers.helperMissing, alias3="function", alias4=container.escapeExpression, alias5=container.lambda;
 
-  return "        <a href=\"#\" title=\"Add as expression\" class=\"action-link "
-    + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.vocabExp : depth0),{"name":"unless","hash":{},"fn":container.program(4, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "\" data-mode=\"vocabExp\" data-index=\""
+  return "    <div class=\"action-bar\">\n        <a href=\"#\" title=\"Add as expression\" class=\"action-link disabled\" data-mode=\"vocabExp\" data-index=\""
     + alias4(((helper = (helper = helpers.index || (data && data.index)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"index","hash":{},"data":data}) : helper)))
     + "\"><img src=\""
-    + alias4(alias5((depths[2] != null ? depths[2].root : depths[2]), depth0))
-    + "/img/add_expression.png\"></a>\n        <a href=\"#\" title=\"Add as reading\" class=\"action-link "
-    + ((stack1 = helpers.unless.call(alias1,(depth0 != null ? depth0.vocabExp : depth0),{"name":"unless","hash":{},"fn":container.program(4, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
-    + "\" data-mode=\"vocabReading\" data-index=\""
+    + alias4(alias5((depths[1] != null ? depths[1].root : depths[1]), depth0))
+    + "/img/add_expression.png\"></a>\n        <a href=\"#\" title=\"Add as reading\" class=\"action-link disabled\" data-mode=\"vocabReading\" data-index=\""
     + alias4(((helper = (helper = helpers.index || (data && data.index)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"index","hash":{},"data":data}) : helper)))
     + "\"><img src=\""
-    + alias4(alias5((depths[2] != null ? depths[2].root : depths[2]), depth0))
-    + "/img/add_reading.png\"></a>\n";
+    + alias4(alias5((depths[1] != null ? depths[1].root : depths[1]), depth0))
+    + "/img/add_reading.png\"></a>\n    </div>\n";
 },"4":function(container,depth0,helpers,partials,data) {
-    return "disabled";
-},"6":function(container,depth0,helpers,partials,data) {
     var stack1, helper, options, alias1=depth0 != null ? depth0 : {}, alias2=helpers.helperMissing, alias3="function", buffer = 
   "    <div class=\"term-expression\"><ruby>";
-  stack1 = ((helper = (helper = helpers.kanjiLinks || (depth0 != null ? depth0.kanjiLinks : depth0)) != null ? helper : alias2),(options={"name":"kanjiLinks","hash":{},"fn":container.program(7, data, 0),"inverse":container.noop,"data":data}),(typeof helper === alias3 ? helper.call(alias1,options) : helper));
+  stack1 = ((helper = (helper = helpers.kanjiLinks || (depth0 != null ? depth0.kanjiLinks : depth0)) != null ? helper : alias2),(options={"name":"kanjiLinks","hash":{},"fn":container.program(5, data, 0),"inverse":container.noop,"data":data}),(typeof helper === alias3 ? helper.call(alias1,options) : helper));
   if (!helpers.kanjiLinks) { stack1 = helpers.blockHelperMissing.call(depth0,stack1,options)}
   if (stack1 != null) { buffer += stack1; }
   return buffer + "<rt>"
     + container.escapeExpression(((helper = (helper = helpers.reading || (depth0 != null ? depth0.reading : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"reading","hash":{},"data":data}) : helper)))
     + "</rt></ruby></div>\n";
-},"7":function(container,depth0,helpers,partials,data) {
+},"5":function(container,depth0,helpers,partials,data) {
     var helper;
 
   return container.escapeExpression(((helper = (helper = helpers.expression || (depth0 != null ? depth0.expression : depth0)) != null ? helper : helpers.helperMissing),(typeof helper === "function" ? helper.call(depth0 != null ? depth0 : {},{"name":"expression","hash":{},"data":data}) : helper)));
-},"9":function(container,depth0,helpers,partials,data) {
+},"7":function(container,depth0,helpers,partials,data) {
     var stack1, helper, options, buffer = 
   "    <div class=\"term-expression\">";
-  stack1 = ((helper = (helper = helpers.kanjiLinks || (depth0 != null ? depth0.kanjiLinks : depth0)) != null ? helper : helpers.helperMissing),(options={"name":"kanjiLinks","hash":{},"fn":container.program(7, data, 0),"inverse":container.noop,"data":data}),(typeof helper === "function" ? helper.call(depth0 != null ? depth0 : {},options) : helper));
+  stack1 = ((helper = (helper = helpers.kanjiLinks || (depth0 != null ? depth0.kanjiLinks : depth0)) != null ? helper : helpers.helperMissing),(options={"name":"kanjiLinks","hash":{},"fn":container.program(5, data, 0),"inverse":container.noop,"data":data}),(typeof helper === "function" ? helper.call(depth0 != null ? depth0 : {},options) : helper));
   if (!helpers.kanjiLinks) { stack1 = helpers.blockHelperMissing.call(depth0,stack1,options)}
   if (stack1 != null) { buffer += stack1; }
   return buffer + "</div>\n";
-},"11":function(container,depth0,helpers,partials,data) {
+},"9":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "    <div class=\"term-rules\">\n"
-    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.rules : depth0),{"name":"each","hash":{},"fn":container.program(12, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.rules : depth0),{"name":"each","hash":{},"fn":container.program(10, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "    </div>\n";
-},"12":function(container,depth0,helpers,partials,data) {
+},"10":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "        <span class=\"rule\">"
     + container.escapeExpression(container.lambda(depth0, depth0))
     + "</span> "
-    + ((stack1 = helpers.unless.call(depth0 != null ? depth0 : {},(data && data.last),{"name":"unless","hash":{},"fn":container.program(13, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.unless.call(depth0 != null ? depth0 : {},(data && data.last),{"name":"unless","hash":{},"fn":container.program(11, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n";
-},"13":function(container,depth0,helpers,partials,data) {
+},"11":function(container,depth0,helpers,partials,data) {
     return "&laquo;";
-},"15":function(container,depth0,helpers,partials,data) {
+},"13":function(container,depth0,helpers,partials,data) {
     var stack1;
 
   return "    <div class=\"term-tags\">\n"
-    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.tags : depth0),{"name":"each","hash":{},"fn":container.program(16, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.each.call(depth0 != null ? depth0 : {},(depth0 != null ? depth0.tags : depth0),{"name":"each","hash":{},"fn":container.program(14, data, 0),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "    </div>\n";
-},"16":function(container,depth0,helpers,partials,data) {
+},"14":function(container,depth0,helpers,partials,data) {
     var helper, alias1=depth0 != null ? depth0 : {}, alias2=helpers.helperMissing, alias3="function", alias4=container.escapeExpression;
 
   return "        <span class=\"tag tag-"
@@ -178,7 +156,7 @@ templates['term.html'] = template({"1":function(container,depth0,helpers,partial
     + "\">"
     + alias4(((helper = (helper = helpers.name || (depth0 != null ? depth0.name : depth0)) != null ? helper : alias2),(typeof helper === alias3 ? helper.call(alias1,{"name":"name","hash":{},"data":data}) : helper)))
     + "</span>\n";
-},"18":function(container,depth0,helpers,partials,data) {
+},"16":function(container,depth0,helpers,partials,data) {
     return "            <li><span>"
     + container.escapeExpression(container.lambda(depth0, depth0))
     + "</span></li>\n";
@@ -188,13 +166,13 @@ templates['term.html'] = template({"1":function(container,depth0,helpers,partial
   return "<div class=\"term-definition\">\n"
     + ((stack1 = helpers["with"].call(alias1,(depth0 != null ? depth0.options : depth0),{"name":"with","hash":{},"fn":container.program(1, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.reading : depth0),{"name":"if","hash":{},"fn":container.program(6, data, 0, blockParams, depths),"inverse":container.program(9, data, 0, blockParams, depths),"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.reading : depth0),{"name":"if","hash":{},"fn":container.program(4, data, 0, blockParams, depths),"inverse":container.program(7, data, 0, blockParams, depths),"data":data})) != null ? stack1 : "")
     + "\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.rules : depth0),{"name":"if","hash":{},"fn":container.program(11, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.rules : depth0),{"name":"if","hash":{},"fn":container.program(9, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n"
-    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.tags : depth0),{"name":"if","hash":{},"fn":container.program(15, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers["if"].call(alias1,(depth0 != null ? depth0.tags : depth0),{"name":"if","hash":{},"fn":container.program(13, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "\n    <div class=\"term-glossary\">\n        <ol>\n"
-    + ((stack1 = helpers.each.call(alias1,(depth0 != null ? depth0.glossary : depth0),{"name":"each","hash":{},"fn":container.program(18, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
+    + ((stack1 = helpers.each.call(alias1,(depth0 != null ? depth0.glossary : depth0),{"name":"each","hash":{},"fn":container.program(16, data, 0, blockParams, depths),"inverse":container.noop,"data":data})) != null ? stack1 : "")
     + "        </ol>\n    </div>\n</div>\n";
 },"useData":true,"useDepths":true});
 templates['term-list.html'] = template({"1":function(container,depth0,helpers,partials,data,blockParams,depths) {
diff --git a/ext/bg/js/translator.js b/ext/bg/js/translator.js
index 606f6ec5..1a7b9bb4 100644
--- a/ext/bg/js/translator.js
+++ b/ext/bg/js/translator.js
@@ -89,12 +89,12 @@ class Translator {
             }
         }
 
-        let results = [];
+        let definitions = [];
         for (const key in groups) {
-            results.push(groups[key]);
+            definitions.push(groups[key]);
         }
 
-        results = results.sort((v1, v2) => {
+        definitions = definitions.sort((v1, v2) => {
             const sl1 = v1.source.length;
             const sl2 = v2.source.length;
             if (sl1 > sl2) {
@@ -123,25 +123,25 @@ class Translator {
         });
 
         let length = 0;
-        for (const result of results) {
+        for (const result of definitions) {
             length = Math.max(length, result.source.length);
         }
 
-        return {results: results, length: length};
+        return {definitions: definitions, length: length};
     }
 
     findKanji(text) {
-        let results     = [];
+        let definitions     = [];
         const processed = {};
 
         for (const c of text) {
             if (!processed[c]) {
-                results = results.concat(this.dictionary.findKanji(c));
+                definitions = definitions.concat(this.dictionary.findKanji(c));
                 processed[c] = true;
             }
         }
 
-        return results;
+        return definitions;
     }
 
     processTerm(groups, source, tags, rules=[], root='') {
diff --git a/ext/bg/js/yomichan.js b/ext/bg/js/yomichan.js
index 887bab2e..e7e674ac 100644
--- a/ext/bg/js/yomichan.js
+++ b/ext/bg/js/yomichan.js
@@ -34,8 +34,6 @@ class Yomichan {
         });
 
         this.translator = new Translator();
-        this.xhr        = null;
-
         this.setState('disabled');
 
         loadOptions((opts) => {
@@ -52,11 +50,12 @@ class Yomichan {
 
     onMessage(request, sender, callback) {
         const {action, params} = request, handlers = {
-            findKanji:  ({text}) => this.actionFindKanji(text, callback),
-            findTerm:   ({text}) => this.actionFindTerm(text, callback),
-            getOptions: () => callback(this.options),
-            getState:   () => callback(this.state),
-            renderText: ({data, template}) => callback(Handlebars.templates[template](data))
+            canAddNotes: ({definitions}) => this.ankiInvoke('canAddNotes', definitions, callback),
+            findKanji:   ({text}) => callback(this.translator.findKanji(text)),
+            findTerm:    ({text}) => callback(this.translator.findTerm(text)),
+            getOptions:  () => callback(this.options),
+            getState:    () => callback(this.state),
+            renderText:  ({data, template}) => callback(Handlebars.templates[template](data))
         };
 
         handlers[action].call(this, params);
@@ -102,49 +101,21 @@ class Yomichan {
         Yomichan.notifyChange('options', this.options);
     }
 
-    actionFindTerm(text, callback) {
-        const results = this.translator.findTerm(text);
-        this.callAnkiApi('canAddNotes', results.results, (definitions) => {
-            if (definitions !== null) {
-                results.results = definitions;
-            }
-
-            callback(results);
-        });
-    }
-
-    actionFindKanji(text, callback) {
-        const results = this.translator.findKanji(text);
-        this.callAnkiApi('cannAddNotes', results.results, (definitions) => {
-            if (definitions !== null) {
-                results.results = definitions;
-            }
-
-            callback(results);
-        });
-    }
-
-    callAnkiApi(action, params, callback) {
-        if (!this.options.enableAnkiConnect) {
+    ankiInvoke(action, params, callback) {
+        if (this.options.enableAnkiConnect) {
+            const xhr = new XMLHttpRequest();
+            xhr.addEventListener('loadend', () => {
+                const resp = xhr.responseText;
+                callback(resp ? JSON.parse(resp) : null);
+            });
+
+            xhr.open('POST', 'http://127.0.0.1:8888');
+            xhr.withCredentials = true;
+            xhr.setRequestHeader('Content-Type', 'text/json');
+            xhr.send(JSON.stringify({action: action, params: params}));
+        } else {
             callback(null);
-            return;
-        }
-
-        if (this.xhr !== null) {
-            this.xhr.abort();
         }
-
-        this.xhr = new XMLHttpRequest();
-        this.xhr.addEventListener('loadend', () => {
-            const resp = this.xhr.responseText;
-            callback(resp ? JSON.parse(resp) : null);
-            this.xhr = null;
-        });
-
-        this.xhr.open('POST', 'http://127.0.0.1:8888');
-        this.xhr.withCredentials = true;
-        this.xhr.setRequestHeader('Content-Type', 'text/json');
-        this.xhr.send(JSON.stringify({action: action, params: params}));
     }
 
     static notifyChange(name, value) {