Helpers

Repeat

The repeat helper is used to efficiently repeat an element inside a container for a given array of data. It is usually called from within the dom updater for an Array property:

The repeat function takes the following arguments:

• container - the DOM node into which place the repeated elements
• items - the array of data to use as the source
• html - the HTML template that should be used for each repeated element - it must have a single root element
• keyFn - a function that returns a unique key for each element - used for efficient re-rendering. The function is passed the item.
• targets - an array of targets in the element that will be updated when the item associated with this element changes, with the same definition as in the props declaration
• events - an object of events that should be attached to each element, with the same definition as in the events declaration
• init - a function that will be run each time an element is created for any one time setup. This is passed the repeated element, the data item, and the index of the item in the source items array

There is also a repeat helper for use on the server.