fix readme bug

README.md

@@ -18,7 +18,7 @@ marked-vega
 ```html
 <marked-element>
   <marked-vega slot="markdown-html"></marked-vega>
-  <script type="text/markdown" src="demo/demo.md"></script>
+  <script type="text/markdown" src="https://rawgit.com/PolymerVis/marked-vega/master/demo/readme.md"></script>
 </marked-element>
 ```
 

demo/readme.md

@@ -0,0 +1,127 @@
+#### 1. Render markdown with Vega-Lite charts with `image` markdown
+~~~
+![vega-lite](http://rawgit.com/PolymerVis/marked-vega/master/demo/barchart-vl.json)
+
+or
+
+![vl](http://rawgit.com/PolymerVis/marked-vega/master/demo/barchart-vl.json)
+~~~
+will renders as:
+![vega-lite](http://rawgit.com/PolymerVis/marked-vega/master/demo/barchart-vl.json)
+
+#### 2. Render markdown with Vega charts with `image` markdown
+~~~
+![vega](http://rawgit.com/PolymerVis/marked-vega/master/demo/barchart-vg.json)
+
+or
+
+![vg](http://rawgit.com/PolymerVis/marked-vega/master/demo/barchart-vg.json)
+~~~
+will renders as:
+![vg](barchart-vg.json)
+
+
+#### 3. Render markdown with Vega/Vega-Lite charts with codeblock
+vega-lite JSON spec in a markdown codeblock:
+~~~~
+```vega-lite
+{
+  "data": {
+    "values": [
+      {"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
+      {"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
+      {"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
+    ]
+  },
+  "mark": "bar",
+  "encoding": {
+    "x": {"field": "a", "type": "ordinal"},
+    "y": {"field": "b", "type": "quantitative"}
+  }
+}
+```
+~~~~
+will renders as:
+```vega-lite
+{
+  "data": {
+    "values": [
+      {"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
+      {"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
+      {"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
+    ]
+  },
+  "mark": "bar",
+  "encoding": {
+    "x": {"field": "a", "type": "ordinal"},
+    "y": {"field": "b", "type": "quantitative"}
+  }
+}
+```
+
+vega-lite spec as YAML in a markdown codeblock:
+~~~~
+```vega-lite
+data:
+  values:
+    - x: A
+      y: 13
+    - x: B
+      y: 55
+    - x: C
+      y: 43
+    - x: D
+      y: 91      
+    - x: E
+      y: 81      
+    - x: F
+      y: 53      
+    - x: G
+      y: 19      
+    - x: H
+      y: 87      
+    - x: I
+      y: 52      
+mark:
+  bar
+encoding:
+  x:
+    field: x
+    type: ordinal
+  y:
+    field: y
+    type: quantitative
+```
+~~~~
+will renders as:
+```vega-lite
+data:
+  values:
+    - x: A
+      y: 13
+    - x: B
+      y: 55
+    - x: C
+      y: 43
+    - x: D
+      y: 91      
+    - x: E
+      y: 81      
+    - x: F
+      y: 53      
+    - x: G
+      y: 19      
+    - x: H
+      y: 87      
+    - x: I
+      y: 52      
+mark:
+  bar
+encoding:
+  x:
+    field: x
+    type: ordinal
+  y:
+    field: y
+    type: quantitative
+```