【问题标题】:How to display a toastr alert in a react form after submit succeed or failed?提交成功或失败后如何在反应表单中显示 toastr 警报?
【发布时间】:2020-10-16 16:12:41
【问题描述】:

我想知道如何在单击显示“您的信息已发送”的“发送信息”按钮时显示一个 toastr 警报,如果失败则“您的信息无法发送,这里有问题!”

我发送的代码是:

 const sendMail = async (data: FormData) => {
    const response = await fetch('https://us-central1-my-website.cloudfunctions.net/apply-function', {
      method: 'POST',
      body: data,
    });
  };

【问题讨论】:

    标签: javascript reactjs forms react-redux toastr


    【解决方案1】:

    一旦解决或拒绝,response 对象将有一个名为 status 的属性,它指示请求是由服务器 (API) 解决还是拒绝。您可以使用status 属性相应地显示警报。

    例子

    import React from 'react';
    
    const Mail = () => {
        const [alert, setAlert] = React.useState({ show: false, message: '' });
    
        const sendMail = async (data: FormData) => {
            //  It's better to use try catch block when writing an async function.
            try {
                const response = await fetch(
                    'https://us-central1-my-website.cloudfunctions.net/apply-function',
                    {
                        method: 'POST',
                        body: data,
                    }
                );
    
                if (response.status === 200) {
                    setAlert({
                        show: true,
                        message: 'Your information has been sent!',
                    });
                }
            } catch {
                // If response was not successful.
                setAlert({
                    show: true,
                    message: 'Your information could not be sent!',
                });
            }
        };
    
        return (
            <>
                {/* Other components.. */}
                <Toaster show={alert.show} message={alert.message} />
            </>
        );
    };
    
    

    【讨论】:

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