Stops errors in the rendering breaking the page

app/assets/javascripts/blob/notebook_viewer.js

@@ -5,6 +5,10 @@ import NotebookLab from 'vendor/notebooklab';
 Vue.use(VueResource);
 Vue.use(NotebookLab);
 
+Vue.config.errorHandler = (err) => {
+  console.log(err);
+}
+
 $(() => {
   const el = document.getElementById('js-notebook-viewer');
 
@@ -12,6 +16,7 @@ $(() => {
     el,
     data() {
       return {
+        error: false,
         loading: true,
         json: {},
       };
@@ -28,14 +33,11 @@ $(() => {
       </div>
     `,
     mounted() {
-      $.get(gon.katex_css_url, () => {
-        const css = $('<link>', {
-          rel: 'stylesheet',
-          type: 'text/css',
-          href: gon.katex_css_url,
-        });
-        css.appendTo('head');
-      });
+      $('<link>', {
+        rel: 'stylesheet',
+        type: 'text/css',
+        href: gon.katex_css_url,
+      }).appendTo('head');
 
       $.getScript(gon.katex_js_url, () => {
         this.$http.get(el.dataset.endpoint)

vendor/assets/javascripts/notebooklab.js

@@ -235,11 +235,24 @@ exports.default = {
     output: function output() {
       return this.cell.outputs[0];
     },
+    outputType: function outputType() {
+      if (!this.output.text) {
+        return Object.keys(this.output.data)[0];
+      }
+    },
     outputText: function outputText() {
       if (this.output.text) {
         return this.output.text.join('');
       } else {
-        return this.output.data[Object.keys(this.output.data)[0]].join('');
+        var output = this.output.data[this.outputType];
+
+        if (typeof output === 'array') {
+          return output.join('');
+        } else if (typeof output === 'string') {
+          return output;
+        } else {
+          return '';
+        }
       }
     }
   }
@@ -257,6 +270,7 @@ exports.default = {
 //
 //
 //
+//
 
 /***/ }),
 /* 4 */
@@ -284,6 +298,11 @@ exports.default = {
       type: Number,
       required: false
     },
+    outputType: {
+      type: String,
+      required: false,
+      default: ''
+    },
     type: {
       type: String,
       required: true
@@ -305,6 +324,13 @@ exports.default = {
       var type = this.type.split('put')[0];
 
       return type.charAt(0).toUpperCase() + type.slice(1);;
+    },
+    isImage: function isImage() {
+      if (this.outputType) {
+        return this.outputType.indexOf('image/') === 0;
+      } else {
+        return false;
+      }
     }
   }
 }; //
@@ -316,6 +342,12 @@ exports.default = {
 //
 //
 //
+//
+//
+//
+//
+//
+//
 
 /***/ }),
 /* 5 */
@@ -1896,6 +1928,7 @@ module.exports={render:function (){var _vm=this;var _h=_vm.$createElement;var _c
     attrs: {
       "type": "output",
       "raw-code": _vm.outputText,
+      "output-type": _vm.outputType,
       "count": _vm.output.execution_count
     }
   }) : _vm._e()], 1)
@@ -1982,10 +2015,14 @@ module.exports={render:function (){var _vm=this;var _h=_vm.$createElement;var _c
       "type": _vm.promptType,
       "count": _vm.count
     }
-  }), _vm._v(" "), _c('pre', {
+  }), _vm._v(" "), (!_vm.isImage) ? _c('pre', {
     domProps: {
       "innerHTML": _vm._s(_vm.code)
     }
+  }, [_vm._v("\n  ")]) : _c('img', {
+    attrs: {
+      "src": 'data:' + _vm.outputType + ';base64,' + _vm.rawCode
+    }
   })], 1)
 },staticRenderFns: []}
 module.exports.render._withStripped = true