@bolduh/svelte-nested-accordion
v0.2.1
Published
Simple tree view component.
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Readme
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demo
installation
npm i @bolduh/svelte-Accordion
usage
<Accordion emptyTreeMessage="nothing to show" selectable root={root} childrenAccessor={accessor} nodeTemplate={Node} filter={nodefilter} ></Accordion>
The Accordion display a tree data structure that must inherit from TVNode
export interface TVNode {
children : TVNode[]; // list of children (may be undefined if no children)
id:any; // unique identifier
}
We will assume that NodeType
is the node type of our Accordion for now on.
Accordion attributes:
- root (
NodeType
): the full tree datastructure - emptyTreeMessage (
string
) : message to display when filter do not return any node - selectable (
boolean
, default is false) : if set add checkbox in front of every node/leaf - nodeTemplate : a svelte component used to render nodes and leafs. it must accept an attribute
data
of the node type (NodeType
) - filter (
(node:NodeType, filter:string ) => boolean
): a function used to filter nodes on a simple text input. if not set no search widget is displayed. returns true if thenode
matches thefilter
. - for custom filters. The Accordion can accept custom filters. A filter must be mapped to a typescript interface, there is no constraint on the type. for now on this class will be
customFilter
- complexFilter(
(node:NodeType, filter:CustomFilter) => boolean
). A function that returns true if thenode
matches thefilter
- filterTemplate : a svelte component displaying the custom filter. It must throw a
filterChanged
event whenever the filter change. the event payload must be an object of typeCustomFilter
- complexFilter(
Accordion events:
The Accordion could raise a selectionChanged
event whenever a node is selected / deselected (when node selection is enabled with selectable
attribute). The event payload contains a list of NodeType
: NodeType[]
const onSelectionChanged = (e:CustomEvent<Disney[]>) => {
selectedNodes = e.detail;
}
<Accordion emptyTreeMessage="no data" on:selectionChanged={onSelectionChanged} selectable {root} nodeTemplate={Node2} {filter} ></Accordion>
styling an Accordion
Styling accordion node may be done using :
- the
nodeClass
attribute that set a CSS class for accordion nodes. - the
style
slot that embed the CSS class.
<Accordion emptyTreeMessage="Mikey Mouse" ref="style2" {root} nodeTemplate={Node2} {filter} disposition="left" nodeClass="reddy">
<style slot="style">
.reddy {
border-bottom: thin solid red;
border-left:thin dotted red;
border-right:thin dashed red;
border-top:solid 5px red;
padding:10px;
border-radius:8px;
}
.reddy:hover{
background-color:lightgreen;
}
</style>
</Accordion>