passwd组件补充change事件

src/form/passwd.js

@@ -213,6 +213,10 @@ class Passwd extends Component {
     this.value = ev.target.value
   }
 
+  handleChange() {
+    this.$emit('change')
+  }
+
   render() {
     return html`
       <div class="label">
@@ -221,6 +225,7 @@ class Passwd extends Component {
           spellcheck="false"
           ref="input"
           @input=${this.handleInput}
+          @change=${this.handleChange}
           :readOnly=${this.readOnly}
           :disabled=${this.disabled}
           :type=${this._type}