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scope.get(key [, options])
Walks up the scope to find a value at key. Stops at the first context where key has
a value.
scope.get( "first.name" );
Parameters
- key
{key}:A dot-separated path. Use
"."if you have a property name that includes a dot.
Returns
{*}:
The found value or undefined if no value is found.
Use
scope.get(key) looks up a value in the current scope’s
context. Values can be looked up in the parent scope object by prefixing the key with "../".
find can also be used to search in the parent’s context after the initial context is explored. For example:
const list = [ { name: "Justin" }, { name: "Brian" } ];
const justin = list[ 0 ];
const curScope = new Scope( list ).add( justin );
// use `get` to find a value in an explicit context
curScope.get( "name" ); //-> "Justin"
curScope.get( "../length" ); //-> 2
// use `find` to search for a value in any context
curScope.find( "name" ); //-> "Justin"
curScope.find( "length" ); //-> 2
Prefixing a key with more than one "../" shifts the lookup path
that many levels up.
const list = [ { name: "Justin" }, { name: "Brian" } ];
list.name = "Programmers";
const justin = list[ 0 ];
const brian = list[ 1 ];
const curScope = new Scope( list ).add( justin ).add( brian );
curScope.get( "name" ); //-> "Brian"
curScope.get( "../name" ); //-> "Justin"
curScope.get( "../../name" ); //-> "Programmers"