<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> </head> <body> <div id="app"> <el-button type="primary" @click="addRequest">添加</el-button> <el-input v-model="bookname" placeholder="请输入内容"></el-input> <el-input v-model="bookIsbn" placeholder="请输入内容"></el-input> <el-input v-model="bookPrice" placeholder="请输入内容"></el-input> <el-input v-model="bookWriter" placeholder="请输入内容"></el-input> </div> <script src="https://cdn.bootcdn.net/ajax/libs/vue/2.7.0/vue.js"></script> <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.4/jquery.js"></script> <!-- 引入样式 --> <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css"> <!-- 引入组件库 --> <script src="https://unpkg.com/element-ui/lib/index.js"></script> <script> let MyVue = new Vue({ el: '#app', data() { return { bookname: "114514", bookIsbn: "114514", bookPrice: "114514", bookWriter: "114514" } }, methods: { addRequest: () => { $.ajax({ url: "http://localhost:8080/bookAdd", method: "POST", contentType: 'application/x-www-form-urlencoded', data: { bookname: this.$data.bookname, bookIsbn: this.$data.bookIsbn, bookPrice: this.$data.bookPrice, bookWriter: this.$data.bookWriter }, success: (res) => { console.log(JSON.parse(res)); } }) } } }) </script> </body> </html>获取data内元素请帮我改正
时间: 2024-01-03 08:41:03 浏览: 49
您的代码中有一处错误,就是在`addRequest`方法中使用了箭头函数,导致`this`指向的是全局对象,而不是Vue实例。因此,在获取`bookname`、`bookIsbn`、`bookPrice`和`bookWriter`数据时,会出现错误。
可以将箭头函数改为普通函数,或者使用ES6的`bind`方法将`this`绑定到Vue实例上。以下是一种修改方式:
```
let MyVue = new Vue({
el: '#app',
data() {
return {
bookname: "114514",
bookIsbn: "114514",
bookPrice: "114514",
bookWriter: "114514"
}
},
methods: {
addRequest: function() {
$.ajax({
url: "http://localhost:8080/bookAdd",
method: "POST",
contentType: 'application/x-www-form-urlencoded',
data: {
bookname: this.bookname,
bookIsbn: this.bookIsbn,
bookPrice: this.bookPrice,
bookWriter: this.bookWriter
},
success: (res) => {
console.log(JSON.parse(res));
}
})
}
}
})
```
在`addRequest`方法中,使用普通函数来定义,这样`this`指向的就是Vue实例。同时,在发送Ajax请求时,将`data`数据中的`this.$data`改为`this`,这样就可以正确获取`bookname`、`bookIsbn`、`bookPrice`和`bookWriter`等数据了。