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Allow having empty arrays of actions and states, which is the initial behaviour of the extension #22

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Mar 28, 2016
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Allow having empty arrays of actions and states, which is the initial behaviour of the extension #22

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6 changes: 3 additions & 3 deletions src/DevtoolsInspector.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,15 +16,15 @@ function getCurrentActionId(props, state) {
function createState(props, state) {
const { supportImmutable, computedStates, actionsById: actions } = props;
const currentActionId = getCurrentActionId(props, state);
const currentAction = actions[currentActionId].action;
const currentAction = actions[currentActionId] && actions[currentActionId].action;

const fromState = currentActionId > 0 ? computedStates[currentActionId - 1] : null;
const toState = computedStates[currentActionId];

const fromInspectedState = fromState &&
getInspectedState(fromState.state, state.inspectedStatePath, supportImmutable);
const toInspectedState =
getInspectedState(toState.state, state.inspectedStatePath, supportImmutable);
toState && getInspectedState(toState.state, state.inspectedStatePath, supportImmutable);
const delta = fromState && toState && DiffPatcher.diff(
fromInspectedState,
toInspectedState
Expand All @@ -33,7 +33,7 @@ function createState(props, state) {
return {
delta,
currentActionId,
nextState: getInspectedState(toState.state, state.inspectedStatePath, false),
nextState: toState && getInspectedState(toState.state, state.inspectedStatePath, false),
action: getInspectedState(currentAction, state.inspectedActionPath, false)
};
}
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