One layer visible at a time with LayerList?

AlexGilvarry1

Is it possible to set the LayerList widget to only show one layer at a time in 4.x? 

rscheitlin

Alex,

   See this sample. It uses a group layer to set the layers to exclusive mode.

        <SPAN class="keyword token">var</SPAN> demographicGroupLayer <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">GroupLayer</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>
          title<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"US Demographics"</SPAN><SPAN class="punctuation token">,</SPAN>
          visible<SPAN class="punctuation token">:</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">,</SPAN>
          visibilityMode<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"exclusive"</SPAN><SPAN class="punctuation token">,</SPAN>
          layers<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN>USALayer<SPAN class="punctuation token">,</SPAN> censusLayer<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
          opacity<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">0.75</SPAN>
        <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

https://developers.arcgis.com/javascript/latest/sample-code/sandbox/index.html?sample=widgets-layerlist-actions