ReactJS - onClick SweetAlert 不工作

Question

我正在使用 ReactJS(和 nodejs、mongodb..)，我有一个带有删除选项的项目，我想显示一个删除警报确认窗口，这是我第一次使用 SweetAlert。它显示 SweetAlert 但不让我选择选项，立即删除项目。我会展示一个 gif，这样你就可以看到发生了什么。

谢谢!

我的项目页面组件:

import React, { Component } from 'react';
import { NavLink } from 'react-router-dom';
import moment from 'moment';

import SweetAlert  from 'react-bootstrap-sweetalert'
import Tasks from '../../TaskList/Tasks/Tasks';

import './ProjectPage.css';



class ProjectPage extends Component {
    constructor(props) {
        super(props);
        this.state = {
            project: {},
            alert: null
        };
    }

    componentDidMount() {

        const { match: { params } } = this.props;

        fetch(`/dashboard/project/${params.id}`)
            .then(response => {
                return response.json()
            }).then(project => {
                this.setState({
                    project: project
                })
            })
    }

deleteProject(e){
    const getAlert = () => (
        <SweetAlert
        warning
        showCancel
        confirmBtnText="Yes!"
        confirmBtnBsStyle="danger"
        cancelBtnBsStyle="default"
        title="Are you sure you want to delete this project?"
        onConfirm={() => this.deleteFile()}
        onCancel={() => this.onCancelDelete()}
        >
        You will not be able to recover this project!
    </SweetAlert>
    );
    this.setState({
        alert: getAlert()
    });

    e.preventDefault();
}

onCancelDelete(){
    this.setState({
        alert: null
    });
}

    render() {

        const { match: { params } } = this.props;

        const BackgroundImage = {
            backgroundImage: `url(${this.state.project.imageURL})`,
            backgroundRepeat: 'no-repeat',
            backgroundSize: 'cover',
            backgroundPosition: 'center',
            height: '350px',
            opacity: '0.7'
        }
        return (

     <div>
         <header style={BackgroundImage}>
 [...]
               <form method='POST' action={`/dashboard/project/${params.id}/delete?_method=DELETE`}>

                   <button id='button__project-delete' style={{ boxShadow: 'none' }} className='button__options--project btn btn-outline-secondary' 
       type='submit' onClick={() => this.deleteProject()}>Delete</button> {this.state.alert}

               </form>

         </header>
  [...]
     </div>

            );
    }
}
export default ProjectPage;

GIF 发生了什么:

Answer 1

看起来你的页面在按钮点击时刷新了，因为它在一个表单对象中。单击按钮时，无法访问单击事件。所以 e.preventDefault() 不起作用。

您必须将事件对象传递给deleteProject() 方法。改变这一行

<button id='button__project-delete' style={{ boxShadow: 'none' }} className='button__options--project btn btn-outline-secondary' 
   type='submit' onClick={() => this.deleteProject()}>Delete</button> {this.state.alert}

到

<button id='button__project-delete' style={{ boxShadow: 'none' }} className='button__options--project btn btn-outline-secondary' 
   type='submit' onClick={(e) => this.deleteProject(e)}>Delete</button> {this.state.alert}