我是 Javascript 世界的新手,开始创建一个简单的 React 项目我从React Starter Kit开始,并添加了我的第一个模块,它是一个简单的上传文件:
上传文件。
import React, { Component, PropTypes } from 'react';
import FormData from 'form-data';
import $ from 'jquery';
class UploadPanel extends Component {
state = {
file:'',
};
uploadSelectedFile() {
// Add the uploaded image content to the form data collection
var data = new FormData();
data.append("image", this.state.file);
data.append("temp", 'temp');
$.ajax({
method: "POST",
url: "rest/dicom/upload",
xhr: function () { // Custom XMLHttpRequest
var myXhr = $.ajaxSettings.xhr();
return myXhr;
},
cache: false,
data: data,
contentType: false,
processData: false,
success: function (data) {
alert('file sent');
console.log(data);
},
error: function (data) {
alert('error');
console.log(data);
}
});
}
handleFileChange(e){
let file = e.target.files;
if(file.length>0)
this.setState({file: file});
else
this.setState({file: ''});
}
render() {
//return <p> hi this is a test </p>
//var createItem = function (item) {
// return <li key={item.id}>{item.text}</li>;
//};
return <form onSubmit={this.uploadSelectedFile()}>
<input type="file" name="image" id="image" value={this.state.file} onChange={this.handleFileChange}/>
<input type="submit" value="ارسال" disabled={this.state.file!=''}/>
</form>;
}
}
export default UploadPanel;
但是当我打开页面时,编译(在服务器中)给出以下错误:
TypeError: _jquery2.default.ajax is not a function
at UploadPanel.uploadSelectedFile (D:\Projects\Behyaar\BOIS\ReactDashboardClient\build\webpack:\src\components\bois\UploadDicom\UploadPanel.js:24:7)
at UploadPanel.render (D:\Projects\Behyaar\BOIS\ReactDashboardClient\build\webpack:\src\components\bois\UploadDicom\UploadPanel.js:59:33)
at ReactCompositeComponentMixin._renderValidatedComponentWithoutOwnerOrContext (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactCompositeComponent.js:587:34)
at ReactCompositeComponentMixin._renderValidatedComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactCompositeComponent.js:607:32)
at wrapper [as _renderValidatedComponent] (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactPerf.js:66:21)
at ReactCompositeComponentMixin.mountComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactCompositeComponent.js:220:30)
at wrapper [as mountComponent] (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactPerf.js:66:21)
at Object.ReactReconciler.mountComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactReconciler.js:37:35)
at ReactDOMComponent.ReactMultiChild.Mixin.mountChildren (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactMultiChild.js:241:44)
at ReactDOMComponent.Mixin._createContentMarkup (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactDOMComponent.js:591:32)
at ReactDOMComponent.Mixin.mountComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactDOMComponent.js:479:29)
at Object.ReactReconciler.mountComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactReconciler.js:37:35)
at ReactCompositeComponentMixin.mountComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactCompositeComponent.js:225:34)
at wrapper [as mountComponent] (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactPerf.js:66:21)
at Object.ReactReconciler.mountComponent (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactReconciler.js:37:35)
at ReactDOMComponent.ReactMultiChild.Mixin.mountChildren (D:\Projects\Behyaar\BOIS\ReactDashboardClient\node_modules\react\lib\ReactMultiChild.js:241:44)
谁能帮忙?为什么要在服务器中运行客户端代码?