Bugfix/#392 model doesn't update when input triggered with the same value

src/__tests__/index.test.js

@@ -67,4 +67,19 @@ describe('directive usage', () => {
     await wrapper.vm.$nextTick();
     expect(wrapper.vm.$el.value).toBe('11.11.2011');
   });
+
+  it('updates model when input value triggered few times with the same value', async () => {
+    const wrapper = mountWithMask({
+      data: () => ({ mask: '##.##.####', value: undefined }),
+      template: '<input v-mask="mask" v-model="value"/>',
+    });
+    const pasteValue = '11112011';
+    wrapper.vm.$el.value = pasteValue;
+    wrapper.trigger('input');
+    wrapper.vm.$el.value = pasteValue;
+    wrapper.trigger('input');
+    await wrapper.vm.$nextTick();
+
+    expect(wrapper.vm.$el.value).toBe('11.11.2011');
+  });
 });

src/directive.js

@@ -9,18 +9,18 @@ import { isAndroid, isChrome } from './utils/env';
  * @param {Boolean}          force
  */
 function updateValue(el, force = false) {
-  const { value, dataset: { previousValue = '', mask } } = el;
+  const { value = '', dataset: { mask } } = el;
 
-  if (force || (value && value !== previousValue && value.length > previousValue.length)) {
+  const hasValue = value.trim().length > 0;
+
+  if (force || hasValue) {
     el.value = format(value, mask);
     if (isAndroid && isChrome) {
       setTimeout(() => trigger(el, 'input'), 0);
     } else {
       trigger(el, 'input');
     }
   }
-
-  el.dataset.previousValue = value;
 }
 
 /**