Append Content Properties: -oxy-append-content / -oxy-prepend-content
Used to append specified content.
-oxy-append-content Property
      
      This property appends the specified content to the content generated by other matching CSS
        rules of lesser specificity. Unlike the content property, where only the
        value from the rule with the greatest specificity is taken into account, the
          -oxy-append-content property adds content to that generated by the lesser
        specificity rules into a new compound content.
element:before{
    content: "Hello";
}
element:before{
    -oxy-append-content: " World!";
}The content shown before the element will be Hello
        World!.
-oxy-prepend-content Property
      
      Prepends the specified content to the content generated by other matching CSS rules of
        lesser specificity. Unlike the content property, where only the value from
        the rule with the greatest specificity is taken into account, the
          -oxy-prepend-content prepends content to that generated by the lesser
        specificity rules into a new compound content.
element:before{
    content: "Hello!";
}
element:before{
    -oxy-prepend-content: "said: ";
}
element:before{
    -oxy-prepend-content: "I ";
}The content shown before the element will be I said:
          Hello!.
