title: Angular formio custom component
body: <p>i've followed formio docs to create custom component but i'm just a beginner so i can't get it work. i want to create custom component to achieve this page</p>
  
  <p><a href="https://i.stack.imgur.com/CDrxC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CDrxC.png" alt="enter image description here"></a></p>
  
  <p>i want to create custom component like add new card which you can choose the children of that card, such as video, or images, inputs etc. basically i want to achieve google forms builder i found formio is the best choice for form builder but i got stuck with this custom component. i heard someone have finally create custom component here in stackoverflow, i also ask them in their question. So, anyone can help me with this? maybe you have source code for me to follow, or anything, really appreciate any help</p>