fabric js bold italic not working because of font styles object in json
<p>I am facing 1 typical issue in fabric js, I am converting canvas to json using <code>canvas.toJson</code> and saved it into database. Later i am loading that json into canvas using <code>loadFromJSON</code> which all working ok.</p>

<p>Now issue is, i have json which has many layers and one layer is textbox which has some styles on fonts, so <code>json</code> of that layer is like,</p>

<pre><code> {
     "type":"textbox",
     "originX":"center",
     "originY":"top",
     "left":1200.84,
     "top":573.63,
     "width":312.81,
     "height":127.46,
     "fill":"rgb(0, 0, 0)",
     "stroke":null,
     "strokeWidth":1,
     "strokeDashArray":null,
     "strokeLineCap":"butt",
     "strokeLineJoin":"miter",
     "strokeMiterLimit":10,
     "scaleX":1,
     "scaleY":1,
     "angle":0,
     "flipX":false,
     "flipY":false,
     "opacity":1,
     "shadow":null,
     "visible":true,
     "clipTo":null,
     "backgroundColor":"",
     "fillRule":"nonzero",
     "globalCompositeOperation":"source-over",
     "transformMatrix":null,
     "lockMovementX":false,
     "lockMovementY":false,
     "evented":true,
     "overrideSecondary":1,
     "text":"NATURAL\nVENEERS",
     "fontSize":63,
     "fontWeight":"",
     "fontFamily":"'trebuchet ms'",
     "fontStyle":"",
     "lineHeight":0.9,
     "textDecoration":"",
     "textAlign":"left",
     "textBackgroundColor":"",
     "styles":{
        "0":{
           "0":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "1":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "2":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "3":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "4":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "5":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "6":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "7":{
              "fontSize":62.666651
           }
        },
        "1":{
           "0":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "1":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "2":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "3":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "4":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "5":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           },
           "6":{
              "fontSize":62.666651,
              "fontFamily":"'trebuchet ms'",
              "fontWeight":"",
              "fontStyle":""
           }
        }
     },
     "minWidth":20
  },
</code></pre>

<p>After load <code>json</code> i am doing bold and italic effect using this code.</p>

<pre><code>canvas.getActiveObject().set("fontWeight", "bold");
canvas.renderAll();
</code></pre>

<p>Which is working but when i do this,</p>

<pre><code>canvas.getActiveObject().set("fontWeight", "");
canvas.getActiveObject().set("fontWeight", "100");
canvas.getActiveObject().set("fontWeight", "normal");
</code></pre>

<p>It will not working. After some investigation i can figure that <code>styles</code> attribute from json causing the issue, If i remove styles from main <code>json</code> object using this code,</p>

<pre><code>delete index['styles'];
</code></pre>

<p>Then <code>bold</code>, <code>italic</code> and <code>normal</code> text works for me. See how it behaving before removing and after removing <code>styles</code> <a href="http://screencast.com/t/MDIVaptPQsM0" rel="nofollow">HERE</a>.</p>

<p>What is the possible solution for this?</p>