vuex-history

undo/redo functionality for Vuex store.

Features

• Vue friendly.
• You can take state-snapshots manually at desired timings
• vuex-history watches specific properties in the state of the store.
• You can have multiple history-lists (e.g. history list for main view + history list for side panel )

Examples

• basic
• vuex-modules(nested store)

Usage

import Vue from 'vue';
import VuexHistory from 'vuex-history';

Vue.use( VuexHistory );

// make your store with Vuex.
const store = new Vuex.Store( {
	state: {
		propA: 0,
		propB: 'abc',
		//... snip
	},
	//... snip
} );

// make a history instance with specific state.
const watchStateNames = [ 'propA' ];
const maxHistoryLength = 50;
const vuexHistory = new VuexHistory( store, watchStateNames, maxHistoryLength );

// save snapshots, undo and redo in your component
// You can also make a mixin. See the examples ↑.

	//... snip
	methods: {

		onValueChangeEnd() {

			vuexHistory.saveSnapshot();

		},

		onPressUndoButton() {

			if ( vuexHistory.canUndo ) vuexHistory.undo();

		},

		onPressRedoButton() {

			if ( vuexHistory.canRedo ) vuexHistory.redo();

		},

		//... snip
	},
	//... snip

Constructor

VuexHistory( store, watchStateNames, maxHistoryLength );

• store — Vuex store instance.
• watchStateNames — property names of the state, in an array. use '/' for namespaced(nested) modules. e.g. : [ 'rootParam1' ,'moduleName/paramA' ]
• maxHistoryLength — Optional. Default is 20.

Properties

• .canUndo — Read only. Whether undo-able or not in a boolean.
• .canRedo — Read only. Whether redo-able or not in a boolean.

Methods

• .undo() — undo.
• .redo() — redo.
• .saveSnapshot() — save snapshot of properties of the state.
• .clearHistory() — Clear history list.
• .hasDifferenceFromLatest() — Returns a boolean. Whether there are diff from the latest snapshot or not.