Fast bulk z-order for graphic elements

A system comprising:

• a processor operating a DOM parser and an interactivity module;
• the DOM parser configured to represent a plurality of graphical elements as a document object model (DOM) having a plurality of nodes, each node representing a different graphical element, the DOM having an ordering of the nodes, each node having a z-value of front or back, indicating that a corresponding graphical element is to be displayed in a front layer for a z-value of front or a back layer for a z-value of back;
• the interactivity module configured to:
• alter the z-value of one or more of the plurality of nodes corresponding to one or more graphical elements to be moved to the front layer or back layer;
• and
• reorder the DOM so that the one or more graphical elements to be moved to the front layer or back layer are at the front or back of the DOM, while maintaining the ordering between nodes having z-values of front and the ordering between nodes having z-values of back.

A non-transitory computer-readable storage medium comprising instructions that, when executed by at least one processor of a machine, cause the machine to perform operations of altering ordering of graphical elements to be presented on a display, including:

• representing a plurality of graphical elements as a document object model (DOM) having a plurality of nodes, each node representing a different graphical element, the DOM having an ordering of the nodes, each node having a z-value of front or back, indicating that a corresponding graphical element is to be displayed in a front layer for a z-value of front or a back layer for a z-value of back;
• altering the z-value of one or more of the plurality of nodes corresponding to one or more graphical elements to be moved to the front layer or back layer;
• and
• reordering the DOM so that the one or more graphical elements to be moved to the front layer or back layer are at the front or back of the DOM, while maintaining the ordering between nodes having z-values of front and the ordering between nodes having z-values of back.