Gets the default match criteria (all true
)
Gets the default match criteria (all true
)
Returns an object which has all the criteria match paths as keys and true
as values, i.e.:
{
to: true,
from: true,
entering: true,
exiting: true,
retained: true,
}
Gets matching nodes as IMatchingNodes
Gets matching nodes as IMatchingNodes
Create a IMatchingNodes object from the TransitionHookTypes that is roughly equivalent to:
let matches: IMatchingNodes = {
to: _matchingNodes([tail(treeChanges.to)], mc.to),
from: _matchingNodes([tail(treeChanges.from)], mc.from),
exiting: _matchingNodes(treeChanges.exiting, mc.exiting),
retained: _matchingNodes(treeChanges.retained, mc.retained),
entering: _matchingNodes(treeChanges.entering, mc.entering),
};
Gets the matching PathNodes
Gets the matching PathNodes
Given an array of PathNodes, and a HookMatchCriterion, returns an array containing
the PathNodes that the criteria matches, or null
if there were no matching nodes.
Returning null
is significant to distinguish between the default
"match-all criterion value" of true
compared to a () => true
function,
when the nodes is an empty array.
This is useful to allow a transition match criteria of entering: true
to still match a transition, even when entering === []
. Contrast that
with entering: (state) => true
which only matches when a state is actually
being entered.
Determines if this hook's matchCriteria match the given TreeChanges
Determines if this hook's matchCriteria match the given TreeChanges
an IMatchingNodes object, or null. If an IMatchingNodes object is returned, its values are the matching PathNodes for each HookMatchCriterion (to, from, exiting, retained, entering)
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