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实现 promise 失办后自动重试

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[js] 写一个方法实现promise失败后自动重试

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    <!DOCTYPE html>
    <html lang="en">
    
    <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    </head>
    
    <body>
    
    </body>
    
    </html>
    <script>
    Promise.retry = (fun, limit = 5) => {
        return new Promise((resolve, reject) => {
            let __num = 1;
            let __run = () => {
                fun()
                    .then(res => {
                        resolve(re

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