A viewer can be automatically instantiated by simply assigning the class `viewer_3Dmoljs` to a `div`.
The viewer will be styled according to the containing `div`, so be sure to set a height and width.
The code below is all that is needed to create the displayed viewer.

    <script src="https://3Dmol.org/build/3Dmol-min.js"></script>
    <script src="https://3Dmol.org/build/3Dmol.ui-min.js"></script>

    <div style="height: 400px; width: 400px; position: relative;" class='viewer_3Dmoljs' data-pdb='2POR' data-backgroundcolor='0xffffff' data-style='stick' data-ui='true'></div>

The contents of the viewer can be set and manipulated through the use of `data-` tags, as shown above. Supported tags include:

- data-pdb The value describes a PDB ID to be loaded into the viewer.
- data-cid The value describes a PubChem compound id to be loaded into the viewer.
- data-href The value is a URL to a molecular data file.
- data-element The value is the id of an HTML element on the current page that has molecular data embedded in it.
- data-type The value is the file format (default pdb; can be pdb, sdf, xyz, mol2, or cube).
- data-backgroundcolor The background color (default black).
- data-backgroundalpha The background alpha (default opaque: 1.0).
- data-select The value is an `AtomSpec` selection specification.
- data-style The value is a style specification.
- data-surface A surface style specification.
- data-labelres A residue label style specification.
- data-zoomto An `AtomSpec` selection specification to zoom to.
- data-spin If set will spin the model using `$3Dmol.GLViewer#spin`. Can specify axis and speed (e.g. data-spin='axis:z;speed:10')
- data-ui If set will show the UI for the viewer.

Multiple selections, styles, residue labels, and surfaces can be provided by appending a suffix
each tag. For example.

             <div style="height: 400px; width: 400px; position: relative;" class='viewer_3Dmoljs' data-pdb='1YCR'
             data-select1='chain:A' data-style1='cartoon:color=spectrum' data-surface1='opacity:.7;color:white' data-select2='chain:B' data-style2='stick'></div>

Once created, the 3Dmol viewer can be accessed using the id of the container div in `$3Dmol.viewers`.