renderer.fromJSON

deleted-user-wcpelUUf_XXx

I am trying to convert a layer back to its original drawing,after changing it.

the service include the layer in json form(i think) i tried both the fromJSON func and rewriting it manually but I think there is something wrong with the way i wrote it.

heres a codepen:

https://codepen.io/segev-salman/pen/MdEbwv

*is there a function to revertback to the original drawing or do i have to change the renderer with the full info inside?  

rscheitlin

Then just clone the original renderer for latter use:

<SPAN class="operator token"><</SPAN>html<SPAN class="operator token">></SPAN>

<SPAN class="operator token"><</SPAN>head<SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>meta charset<SPAN class="operator token">=</SPAN><SPAN class="string token">"utf-8"</SPAN><SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>meta name<SPAN class="operator token">=</SPAN><SPAN class="string token">"viewport"</SPAN> content<SPAN class="operator token">=</SPAN><SPAN class="string token">"initial-scale=1, maximum-scale=1, user-scalable=no"</SPAN><SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>title<SPAN class="operator token">></SPAN>Heat<SPAN class="operator token">-</SPAN>map creator<SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>title<SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>link rel<SPAN class="operator token">=</SPAN><SPAN class="string token">"stylesheet"</SPAN> href<SPAN class="operator token">=</SPAN><SPAN class="string token">"https://www.w3schools.com/w3css/4/w3.css"</SPAN><SPAN class="operator token">></SPAN>

  <SPAN class="operator token"><</SPAN>style<SPAN class="operator token">></SPAN>
    #rendPanel <SPAN class="punctuation token">{</SPAN>
      padding<SPAN class="punctuation token">:</SPAN> 10px<SPAN class="punctuation token">;</SPAN>
      background<SPAN class="operator token">-</SPAN>color<SPAN class="punctuation token">:</SPAN> <SPAN class="token function">rgba</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="number token">255</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">255</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">255</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0.8</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>

    <SPAN class="punctuation token">.</SPAN>esri<SPAN class="operator token">-</SPAN>button <SPAN class="punctuation token">{</SPAN>
      margin<SPAN class="punctuation token">:</SPAN> 2px<SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>

    html<SPAN class="punctuation token">,</SPAN>
    body<SPAN class="punctuation token">,</SPAN>
    #viewDiv <SPAN class="punctuation token">{</SPAN>
      padding<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">;</SPAN>
      margin<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">;</SPAN>
      height<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">100</SPAN><SPAN class="operator token">%</SPAN><SPAN class="punctuation token">;</SPAN>
      width<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">100</SPAN><SPAN class="operator token">%</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>
  <SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>style<SPAN class="operator token">></SPAN>

  <SPAN class="operator token"><</SPAN><SPAN class="operator token">!</SPAN><SPAN class="operator token">--</SPAN> <SPAN class="operator token"><</SPAN>link rel<SPAN class="operator token">=</SPAN><SPAN class="string token">"stylesheet"</SPAN> href<SPAN class="operator token">=</SPAN><SPAN class="string token">"https://js.arcgis.com/4.11/esri/css/main.css"</SPAN><SPAN class="operator token">></SPAN> <SPAN class="operator token">--</SPAN><SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>link
      rel<SPAN class="operator token">=</SPAN><SPAN class="string token">"stylesheet"</SPAN>
      href<SPAN class="operator token">=</SPAN><SPAN class="string token">"https://js.arcgis.com/4.11/esri/themes/light/main.css"</SPAN>
    <SPAN class="operator token">/</SPAN><SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>script src<SPAN class="operator token">=</SPAN><SPAN class="string token">"https://js.arcgis.com/4.11/"</SPAN><SPAN class="operator token">></SPAN><SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>script<SPAN class="operator token">></SPAN>

  <SPAN class="operator token"><</SPAN>script<SPAN class="operator token">></SPAN>
    <SPAN class="keyword token">var</SPAN> origRend<SPAN class="punctuation token">;</SPAN>
    <SPAN class="token function">require</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN>
      <SPAN class="string token">"esri/Map"</SPAN><SPAN class="punctuation token">,</SPAN>
      <SPAN class="string token">"esri/views/MapView"</SPAN><SPAN class="punctuation token">,</SPAN>
      <SPAN class="string token">"esri/layers/FeatureLayer"</SPAN><SPAN class="punctuation token">,</SPAN>
      <SPAN class="string token">"esri/renderers/smartMapping/creators/heatmap"</SPAN>
    <SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>Map<SPAN class="punctuation token">,</SPAN> MapView<SPAN class="punctuation token">,</SPAN> FeatureLayer<SPAN class="punctuation token">,</SPAN> heatmapRendererCreator<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>

      <SPAN class="keyword token">var</SPAN> pov <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">FeatureLayer</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>
        url<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/ACS_Poverty_by_Age_Boundaries/FeatureServer/1"</SPAN><SPAN class="punctuation token">,</SPAN>
        minScale<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">40000000</SPAN><SPAN class="punctuation token">,</SPAN>
        maxScale<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">4000</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

      <SPAN class="keyword token">var</SPAN> TF <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">FeatureLayer</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>
        url<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"https://services3.arcgis.com/1pxU2hJU9ZszJDcX/ArcGIS/rest/services/Young_Adult_Treatment_Facilities/FeatureServer/0"</SPAN><SPAN class="punctuation token">,</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

      <SPAN class="comment token">//apply HM to layer      </SPAN>
      <SPAN class="keyword token">function</SPAN> <SPAN class="token function">apply</SPAN><SPAN class="punctuation token">(</SPAN>result<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        origRend <SPAN class="operator token">=</SPAN> TF<SPAN class="punctuation token">.</SPAN>renderer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">clone</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
        TF<SPAN class="punctuation token">.</SPAN>renderer <SPAN class="operator token">=</SPAN> result<SPAN class="punctuation token">.</SPAN>renderer<SPAN class="punctuation token">;</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">;</SPAN>

      <SPAN class="keyword token">function</SPAN> <SPAN class="token function">remove</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        console<SPAN class="punctuation token">.</SPAN><SPAN class="token function">log</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"removing"</SPAN><SPAN class="punctuation token">)</SPAN>
        TF<SPAN class="punctuation token">.</SPAN>renderer <SPAN class="operator token">=</SPAN> origRend<SPAN class="punctuation token">;</SPAN>
      <SPAN class="punctuation token">}</SPAN>

      <SPAN class="keyword token">var</SPAN> map <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Map</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>
        basemap<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"gray"</SPAN><SPAN class="punctuation token">,</SPAN>
        layers<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN>pov<SPAN class="punctuation token">,</SPAN> TF<SPAN class="punctuation token">]</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

      <SPAN class="keyword token">var</SPAN> view <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">MapView</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>
        container<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"viewDiv"</SPAN><SPAN class="punctuation token">,</SPAN>
        map<SPAN class="punctuation token">:</SPAN> map<SPAN class="punctuation token">,</SPAN>
        center<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">102.370576</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">40.172530</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
        zoom<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">5</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

      <SPAN class="keyword token">var</SPAN> heatmapParams <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN>
        layer<SPAN class="punctuation token">:</SPAN> TF<SPAN class="punctuation token">,</SPAN>
        basemap<SPAN class="punctuation token">:</SPAN> map<SPAN class="punctuation token">.</SPAN>basemap<SPAN class="punctuation token">,</SPAN>
        field<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"adlt"</SPAN><SPAN class="punctuation token">,</SPAN>
        view<SPAN class="punctuation token">:</SPAN> view
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">;</SPAN>

      document<SPAN class="punctuation token">.</SPAN><SPAN class="token function">getElementById</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"butt-1"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">addEventListener</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"click"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        heatmapRendererCreator<SPAN class="punctuation token">.</SPAN><SPAN class="token function">createRenderer</SPAN><SPAN class="punctuation token">(</SPAN>heatmapParams<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">then</SPAN><SPAN class="punctuation token">(</SPAN>apply<SPAN class="punctuation token">)</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

      document<SPAN class="punctuation token">.</SPAN><SPAN class="token function">getElementById</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"butt-2"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">addEventListener</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"click"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        <SPAN class="token function">remove</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
      <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

      view<SPAN class="punctuation token">.</SPAN>ui<SPAN class="punctuation token">.</SPAN><SPAN class="token function">add</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"rendPanel"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"top-right"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
  <SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>script<SPAN class="operator token">></SPAN>
<SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>head<SPAN class="operator token">></SPAN>

<SPAN class="operator token"><</SPAN>body<SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>div id<SPAN class="operator token">=</SPAN><SPAN class="string token">"viewDiv"</SPAN><SPAN class="operator token">></SPAN><SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>div<SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN>div id<SPAN class="operator token">=</SPAN><SPAN class="string token">"rendPanel"</SPAN> <SPAN class="keyword token">class</SPAN><SPAN class="operator token">=</SPAN><SPAN class="string token">"esri-widget"</SPAN><SPAN class="operator token">></SPAN>
    <SPAN class="operator token"><</SPAN>button id<SPAN class="operator token">=</SPAN><SPAN class="string token">"butt-1"</SPAN> <SPAN class="keyword token">class</SPAN><SPAN class="operator token">=</SPAN><SPAN class="string token">"esri-button"</SPAN><SPAN class="operator token">></SPAN>
      create Heatmap
    <SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>button<SPAN class="operator token">></SPAN>
    <SPAN class="operator token"><</SPAN>button id<SPAN class="operator token">=</SPAN><SPAN class="string token">"butt-2"</SPAN> <SPAN class="keyword token">class</SPAN><SPAN class="operator token">=</SPAN><SPAN class="string token">"esri-button"</SPAN><SPAN class="operator token">></SPAN>
      remove Heatmap
    <SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>button<SPAN class="operator token">></SPAN>
  <SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>div<SPAN class="operator token">></SPAN>
<SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>body<SPAN class="operator token">></SPAN>

<SPAN class="operator token"><</SPAN><SPAN class="operator token">/</SPAN>html<SPAN class="operator token">></SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>