VUX version

2.9.2

OS/Browsers version

ios,google

Vue version

2.6.10

Code

<x-input v-model.trim="account" type="tel" @on-blur="blurIn" ref="Phone Number" autocomplete="no" placeholder="Phone Number" @on-change="changeAccount" required>
                    <svg-icon type="shouji" slot="label"></svg-icon>
</x-input>

changeAccount (val) {
      this.loginData.account = val;
           if (val.length === 4) {
              let value = `(${val.substr(0, 3)})${val.substr(-1)}`;
             this.account = value;
            this.$refs['Phone Number'].focus;
      }
}

Steps to reproduce

如果输入框有值，js为其重新赋值，再自动获取焦点时，焦点不在文字最后。

What is Expected?

焦点在文字末尾处

What is actually happening?

焦点在手动输入文字处