Provider

The Provider is a class that is responsible for linking nodes to binding handlers. Several are built into Knockout, including:

Provider	Sample
`DataBindProvider`	`<span data-bind='text: x'></span>`
`VirtualProvider`	`<!-- ko text: x --><!-- /ko -->`
`ComponentProvider`	`<custom-hello></custom-hello>`
`AttributeProvider`	`<span ko-title='x'></span>`
`TextMustacheProvider`	{% raw %}`{{ x_text }}`{% endraw %} {% raw %}`{{{ x_html }}}`{% endraw %} {% raw %}`{{# text: thing /}}`{% endraw %}
`AttributeMustacheProvider`	{% raw %}`<span title='The {{ x }} title'></span>`{% endraw %}
`MultiProvider`	Combines more than one provider together.

When building custom versions of tko, one can choose to use one or more binding providers, or to create a custom binding provider.

The Provider class is an abstract interface, whose subclasses must contain:

Attribute	Reason
`nodeHasBindings(node)`	A method that returns true when the `node` is one that this provider can link.
`getBindingAccessors(node, context)`	A method that returns an object containing one or more `{handler: accessor}` where `handler` is a the name of a registered BindingHandler and `accessor` is a function that returns the `valueAccessor`.
`FOR_NODE_TYPES`	An array of integers corresponding to the `nodeType` attributes of nodes that shall match (i.e. `1` for `Node.ELEMENT_NODE`, `3` for `Node.TEXT_NODE`, `8` for `Node.COMMENT_NODE`)
`preprocessNode(node)`	Perform any preprocessing on the `node`; may replace the `node` with one or more substitute nodes or append `nodes` after it.