can-view-scope

module

Create a lookup node for [can-mustache.key keys].

`new Scope(context, [parent], [meta] )`

Parameters

context {*}:
A value that represents the current context. This is often an object or observable and is the first place a key is looked up.
parent {can-view-scope}:
The parent scope. If a key value is not found in the current scope, it will then look in the parent scope.
meta {Meta}:
A configuration object that can specify special behavior of the context.

Returns

{can-view-scope}:

Returns a scope instance.

Use

A can-view-scope represents a lookup context and parent contexts that can be used to lookup a key value.

If no parent scope is provided, only the scope's context will be explored for values. For example:

var data = {name: {first: "Justin"}},
    scope = new Scope(data);

scope.get("name.first") //-> "Justin"
scope.get("length")     //-> undefined

However, if a parent scope is provided, key values will be searched in the parent's context after the initial context is explored. For example:

var list = [{name: "Justin"},{name: "Brian"}],
    justin = list[0];

var listScope = new Scope(list),
    curScope = new Scope(justin, listScope)

curScope.get("name") //-> "Justin"
curScope.get("length") //-> 2

Use add to easily create a new scope from a parent scope like:

var list = [{name: "Justin"},{name: "Brian"}],
    justin = list[0];

var curScope = new Scope(list).add(justin);

curScope.get("name") //-> "Justin"
curScope.get("length") //-> 2