SyntaxError:导入声明只能出现在模块的顶层.使用Express，没有Webpack [英] SyntaxError: import declarations may only appear at top level of a module. Using express, no webpack

问题描述

我正在尝试在前端脚本中导入npm模块.据说模块必须在顶层才能导入，但据我所知，它在顶层.也许我的Web服务器弄乱了我的代码.我不确定

I am trying to import a npm module in the front end script. It is saying modules must be on top level to import but it is at the top level from what I can tell. Maybe my web server is messing with my code. I am unsure.

现在的代码很丑陋，因为我想让所有东西都摆好位置.

The code is ugly right now because I am trying to get everything situated.

我已经尝试过

<script type='module' src='./js/scripts.js'></script>

scripts.js

scripts.js

import axios from 'axios';


function getQueryStringValue (key) {  
    return decodeURIComponent(window.location.search.replace(new RegExp("^(?:.*[&\\?]" + encodeURIComponent(key).replace(/[\.\+\*]/g, "\\$&") + "(?:\\=([^&]*))?)?.*$", "i"), "$1"));  
}  
const query = getQueryStringValue('code');

class chime {
    constructor(code) {
        this.code = code;
    };
    async logIn() {
        const response = await axios.post('url', {
            'client_id': '',
            'client_secret': '',
            'grant_type': '',
            'redirect_uri': 'https://localhost:3000',
            'code': this.code
        });

        console.log(response);
    }
    test() {
        console.log(this.code);
    }
}

if (query) {
    const client = new chime(query);

    client.logIn();

};

var express = require('express')
var fs = require('fs')
var https = require('https')
var app = express()
const path = require('path');

const publicPath = path.join(__dirname, '../public');
const port = 3000;

app.use(express.static(publicPath));



app.get('*', (req, res) => {
    res.sendFile(path.join(publicPath, '/index.html'));
});


https.createServer({
  key: fs.readFileSync(path.join(__dirname + '/ssl/server.key')),
  cert: fs.readFileSync(path.join(__dirname+ '/ssl/server.cert'))
}, app)
    .listen(3000, function () {
    console.log('Example app listening on port 3000! Go to https://localhost:3000/')
    });

我希望能够导入npm模块.

I am wanting to be able to import npm modules.

推荐答案

从"axios"导入axios；

裸模块导入在浏览器中不起作用.您需要使用Web服务器可以服务的文件的相对路径(而不仅仅是NPM软件包名称/ node_modules 中的软件包导出的模块，而不是服务目录)可以使用提供的项目根目录将代码从 node_modules 生成捆绑包的相对路径/拉动工具链.

Bare module imports won't work in the browser. You need to use relative paths to a file that can be served by your web server (and not simply the NPM package name/a module exported by a package in node_modules and not a served directory), or a toolchain that can use a provided project root to generate the relative paths/pull in code from node_modules into a bundle.

这是说模块必须在顶层才能导入，但据我所知，它在顶层

It is saying modules must be on top level to import but it is at the top level from what I can tell

您没有提供完整的设置，但是使用隐式层次结构，我得到了 Uncaught TypeError:无法解析模块说明符"axios".相对引用必须以"/"、./"或"../"开头.在Chrome中，与上述问题一致.

You didn't provide your entire setup, but using the implied hierarchy, I get Uncaught TypeError: Failed to resolve module specifier "axios". Relative references must start with either "/", "./", or "../". in Chrome, which is consistent with the above issue.

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