title: ERROR TypeError: Cannot read property '0' of undefined | Angular 4
body: <p>I'm getting this error when I try to print a data from the JSON I get from the API. It does print correctly however this error appears on the console and I'm not sure how to fix it.</p>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>{{datas[0].dimension}}
  </code></pre>
  
  <p><strong>TS</strong></p>
  
  <pre><code>datas: Data[];
  this.abcService.getDatas().subscribe(datas =&gt; {
    this.datas = datas;
    console.log(datas);
  });
  </code></pre>
  
  <p><strong>JSON got from the API (console.log)</strong></p>
  
  <pre><code>(1) [{…}]
  0:
    dimension:"bla bla bla"
  __proto__:Object
  length:1
  </code></pre>
  
  <p><strong>Full error on console</strong></p>
  
  <pre><code>ERROR TypeError: Cannot read property '0' of undefined
      at Object.eval [as updateRenderer] (GraphicsComponent.html:11)
      at Object.debugUpdateRenderer [as updateRenderer] (core.es5.js:13113)
      at checkAndUpdateView (core.es5.js:12260)
      at callViewAction (core.es5.js:12620)
      at execComponentViewsAction (core.es5.js:12552)
      at checkAndUpdateView (core.es5.js:12261)
      at callViewAction (core.es5.js:12620)
      at execEmbeddedViewsAction (core.es5.js:12578)
      at checkAndUpdateView (core.es5.js:12256)
      at callViewAction (core.es5.js:12620)
  
  DebugContext_ {view: {…}, nodeIndex: 17, nodeDef: {…}, elDef: {…}, elView: {…}}
  component: (...)
  componentRenderElement:(...)
  context:(...)
  elDef:{index: 16, parent: null, renderParent: null, bindingIndex: 0, outputIndex: 0, …}
  elOrCompView:(...)
  elView:{def: {…}, parent: {…}, viewContainerParent: null, parentNodeDef: {…}, context: GraphicsComponent, …}
  injector:(...)
  nodeDef:{index: 17, parent: {…}, renderParent: {…}, bindingIndex: 0, outputIndex: 0, …}
  nodeIndex:17
  providerTokens:(...)
  references:(...)
  renderNode:(...)
  view:{def: {…}, parent: {…}, viewContainerParent: null, parentNodeDef: {…}, context: GraphicsComponent, …}
  __proto__:Object
  </code></pre>
  
  <p>Obs: HTML does print "bla bla bla"</p>