How to prevent column break within an element?

Question

Consider the following HTML:

    

        
Number one
        
Number two
        &         


        
      

Answer 1

The following code works to prevent column breaks inside elements:

-webkit-column-break-inside: avoid;
-moz-column-break-inside: avoid;
-o-column-break-inside: avoid;
-ms-column-break-inside: avoid;
column-break-inside: avoid;