修正：

Question

我正在进行一个非常简单的nodejs项目转换为typescript。节点项目的前2个/主文件已正确转换。除了文件顶部的requires语句以引入依赖关系之外，第三个被转换。

我确定找到了依赖项，因为VSCode可以自动完成并为依赖项对象着色，并且没有编译器错误。 3个文件中的每一个都使用ts import语句而不是require。

因为它适用于3个文件中的2个并且它们基本相同，所以我不知道从哪里开始。这听起来像编译问题吗？

    //tsconfig.json
    {
        "compileOnSave": true,
        "compilerOptions": {
            "module": "commonjs",
            "sourceMap": true,
            "target": "es6",
            "moduleResolution": "node",
            "allowUnreachableCode" : true,    
            "listFiles":true,
            "outDir":"js",
            "watch": true

        },
        "files": [
            "./typings/index.d.ts",
            "./src/route.ts",
            "./src/app.ts",
            "./src/email.ts",
            "./spec/email.spec.ts"
        ]
    } 

//email.ts
"use strict";

import * as sendgrid from "sendgrid";

    export class mailer{

        public Send(){

            let sendGridAcctUser = "dina@dfberry.io";
            let sendGridAcctKey: string = "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";           

            let toEmail = "admin@dfberry.io";
            let fromEmail = "dinaberry@outlook.com";
            let mysubject = "test email";
            let mytext = "this is a test";

            let options: Sendgrid.EmailOptions;
            options.subject = mysubject;
            options.text = mytext;
            options.to = toEmail;
            options.from = fromEmail;
            options.replyto = fromEmail;

            let myEmail: Sendgrid.Email;
            myEmail = new Sendgrid.Email(options);

            //let emailer : SendGrid;
            let sg : Sendgrid.Constructor;

            let sgInstance : Sendgrid.Instance;

            sgInstance = new sg(sendGridAcctUser, sendGridAcctKey);

            sgInstance.send(options, function( err, json){
                console.log(err);
                console.log(json);
            } );
        }
    }

    // compiled email.js -- expect requires after "use strict"
    "use strict";
    class mailer {
        Send() {
            let sendGridAcctUser = "dina@dfberry.io";
            let sendGridAcctKey = "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";
            let toEmail = "admin@dfberry.io";
            let fromEmail = "dinaberry@outlook.com";
            let mysubject = "test email";
            let mytext = "this is a test";
            let options;
            options.subject = mysubject;
            options.text = mytext;
            options.to = toEmail;
            options.from = fromEmail;
            options.replyto = fromEmail;
            let myEmail;
            myEmail = new Sendgrid.Email(options);
            //let emailer : SendGrid;
            let sg;
            let sgInstance;
            sgInstance = new sg(sendGridAcctUser, sendGridAcctKey);
            sgInstance.send(options, function (err, json) {
                console.log(err);
                console.log(json);
            });
        }
    }
    exports.mailer = mailer;

Answer 1

您的问题是以下行已从输出中删除：

import * as sendgrid from "sendgrid";

这是可以预料的。如果在变量位置的文件中未使用导入，则将其删除。

修正：

以下内容将起作用：

 import * as sendgrid from "sendgrid";
 const _ensure = sendgrid;

Typescript编译不会将require语句添加到某些文件

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