diff --git a/list-editor/index.js b/list-editor/index.js
index 800a2a1..d5577de 100644
--- a/list-editor/index.js
+++ b/list-editor/index.js
@@ -220,7 +220,10 @@ function editor(root, inputData, options) {
             })
         })
 
-        trigger('change')
+        if (store.hasChanged()) {
+            trigger('change')
+            store.clearChanged()
+        }
 
         let $span = $('<div class="content">');
         options.transform(text, $span)
@@ -258,13 +261,23 @@ function editor(root, inputData, options) {
 
     function save() {
         return new Promise(function (resolve, reject) {
-            resolve(store.debug().result);
+            if (store.hasChanged()) {
+                resolve(store.debug().result)
+                store.clearChanged()
+            } else {
+                reject()
+            }
         });
     }
 
     function saveTree(from) {
         return new Promise(function (resolve, reject) {
-            resolve(store.tree(from))
+            if (store.hasChanged()) {
+                resolve(store.tree(from))
+                store.clearChanged()
+            } else {
+                reject()
+            }
         });
     }
 
diff --git a/list-editor/store.js b/list-editor/store.js
index 0f94495..318fef2 100644
--- a/list-editor/store.js
+++ b/list-editor/store.js
@@ -9,6 +9,7 @@ import _ from 'lodash';
 function Store(inputData) {
     let idList = [];
     let values = {};
+    let changed = false;
 
     let ID = function () {
         return '_' + Math.random().toString(36).substr(2, 12);
@@ -123,6 +124,7 @@ function Store(inputData) {
             id = newId
         }
         idList.splice(index, 0, id)
+        changed = true
         return id
     }
 
@@ -151,6 +153,7 @@ function Store(inputData) {
             return item.id
         })
         idList.splice(index + 1, 0, ...newItems)
+        changed = true
         return newItems[0]
     }
 
@@ -168,6 +171,7 @@ function Store(inputData) {
         delete item.children
         values[id] = item;
         idList.push(id)
+        changed = true
         return id;
     }
 
@@ -185,7 +189,12 @@ function Store(inputData) {
      */
     function update(currentId, callback) {
         let index = _.findIndex(idList, (id) => id === currentId)
-        values[currentId] = callback(values[currentId], values[idList[index - 1]], values[idList[index + 1]])
+        let oldValue = _.clone(values[currentId])
+        let newValue = callback(values[currentId], values[idList[index - 1]], values[idList[index + 1]]);
+        if (oldValue.text !== newValue.text) {
+            values[currentId] = newValue
+            changed = true
+        }
         return currentId
     }
 
@@ -209,6 +218,7 @@ function Store(inputData) {
 
     function remove(start, len) {
         idList.splice(start, len)
+        changed = true
     }
 
     /**
@@ -255,6 +265,7 @@ function Store(inputData) {
             list.push(item)
             return list
         }, [])
+        changed = true
     }
 
     /**
@@ -266,7 +277,9 @@ function Store(inputData) {
         let fromIndex = _.findIndex(idList, (id) => id === from)
         let item = values[from]
         remove(fromIndex, 1)
-        return insertBefore(to, item)
+        let result = insertBefore(to, item)
+        changed = true
+        return result
     }
 
     /**
@@ -362,6 +375,14 @@ function Store(inputData) {
         return top(stack)
     }
 
+    function clearChanged() {
+        changed = false
+    }
+
+    function hasChanged() {
+        return changed;
+    }
+
     _.each(inputData, (d) => {
         append(d)
     })
@@ -386,7 +407,9 @@ function Store(inputData) {
         nextCursorPosition,
         debug,
         tree,
-        flat
+        flat,
+        hasChanged,
+        clearChanged,
     };
 }