打字稿编译不会对某些文件添加require语句 [英] Typescript compilation doesn't add require statement to some files

问题描述

我正在开发一个非常简单的将nodejs项目转换为typescript。节点项目的前2个/主要文件正确翻译。第三个文件除了需要在文件的顶部的语句拉入依赖。

I'm working on a very simple conversion of a nodejs project to typescript. The first 2/main files of the node project transpiled correctly. The 3rd transpiled except for the requires statement at the top of the file to pull in dependencies.

我确信找到依赖关系，因为VSCode可以自动完成和着色依赖对象，没有编译器错误。这3个文件中的每个文件使用ts import语句，而不是必需的。

I'm sure the dependency is found because VSCode could autocomplete and color the dependency objects and there were no compiler errors. Each of the 3 files uses ts import statements instead of requires.

由于它在3个文件中的2个文件中工作，它们基本相同，我不知道开始。这听起来像一个编译问题？

Since it works in 2 of the 3 files and they are basically the same, I don't know where to start. Does this sound like a compile issue?

    //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 = "[e-mail]";
            let sendGridAcctKey: string = "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";           

            let toEmail = "[e-mail]";
            let fromEmail = "[e-mail]";
            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 = "[e-mail]";
            let sendGridAcctKey = "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";
            let toEmail = "[e-mail]";
            let fromEmail = "[e-mail]";
            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;

推荐答案

您的问题是，输出：

import * as sendgrid from "sendgrid";

这是预期的。如果未在变量位置的文件中使用导入，则将其删除。

This is to be expected. If an import is not used in the file in a variable position then its erased.

类似下面的工作方式：

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

更多

https://basarat.gitbooks.io/typescript/content/docs /project/external-modules.html

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