ConfirmPlugin，引用官网上面的demo(prompt)， 会有如下问题，建议inputAttrs给一个[default type="text"]

[Hyhello]

问题描述：直接引用官网上面的demo 会报错，错误代码如下：

1. Error in render: "TypeError: Cannot read property 'type' of undefined"。
2. TypeError: Cannot read property 'type' of undefined
   at Proxy.render (eval at ./node_modules/.13.7.1@vue-loader/lib/template-compiler/index.js?{"id":"data-v-36aac356","hasScoped":false,"transformToRequire":{"video":["src","poster"],"source":"src","img":"src","image":"xlink:href"},"buble":{"transforms":{}}}!./node_modules/.1.2.6@vux-loader/src/before-template-compiler-loader.js!./node_modules/.1.2.6@vux-loader/src/template-loader.js!./node_modules/.13.7.1@vue-loader/lib/selector.js?type=template&index=0!./node_modules/.2.8.1@vux/src/components/confirm/index.vue (app.js:1262), :68:38)