如何使用 typescript 导入 moment.js? [英] How can moment.js be imported with typescript?

问题描述

我正在尝试学习打字稿.虽然我认为这无关紧要，但我在此演示中使用了 VSCode.

I'm trying to learn Typescript. While I don't think it's relevant, I'm using VSCode for this demo.

我有一个 package.json 里面有这些片段:

I have a package.json that has these pieces in it:

{
  "devDependencies": {
    "gulp": "^3.9.1",
    "jspm": "^0.16.33",
    "typescript": "^1.8.10"
  },
  "jspm": {
    "moment": "npm:moment@^2.12.0"
  }
}

然后我有一个 Typescript 类 main.js 像这样:

Then I have a Typescript class main.js like this:

import moment from 'moment';
export class Main {
}

我的 gulpfile.js 看起来像这样:

My gulpfile.js looks like this:

var gulp = require('gulp');
var typescript = require('gulp-tsb');
var compilerOptions = {
                        "rootDir": "src/",
                        "sourceMap": true,
                        "target": "es5",
                        "module": "amd",
                        "declaration": false,
                        "noImplicitAny": false,
                        "noResolve": true,
                        "removeComments": true,
                        "noLib": false,
                        "emitDecoratorMetadata": true,
                        "experimentalDecorators": true
                      };
var typescriptCompiler = typescript.create(compilerOptions);
gulp.task('build', function() {
  return gulp.src('/src')
    .pipe(typescriptCompiler())
    .pipe(gulp.dest('/dest'));
});

当我运行 gulp build 时，我收到消息:"../main.ts(1,25): Cannot file module 'moment'."

When I run gulp build, I get the message: "../main.ts(1,25): Cannot file module 'moment'."

如果我使用 import moment = require('moment'); 然后 jspm 将工作并在我运行应用程序时引入模块，但我仍然收到构建错误.我也试过:

If I use import moment = require('moment'); then jspm will work and bring in the module when I run the application, but I'm still receiving the build error. I also tried:

npm install typings -g
typings install moment --ambient --save

问题不但没有好转，反而变得更糟.现在我在构建时遇到上述错误以及以下错误:"../typings/browser/ambient/moment/index.d.ts(9,21): 找不到命名空间 'moment'."

Instead of making the problem better though, it got worse. Now I get the above error on build as well as the following: "../typings/browser/ambient/moment/index.d.ts(9,21): Cannot find namespace 'moment'."

如果我转到typings提供的文件并在文件底部添加:

If I go to the file provided by typings and add at the bottom of the file:

declare module "moment" { export = moment; }

我可以让第二个错误消失，但我仍然需要 require 语句才能在我的 main.ts 文件中工作，并且仍然遇到第一个构建错误.

I can get the second error to go away, but I still need the require statement to get moment to work in my main.ts file and am still getting the first build error.

我需要暂时创建自己的 .d.ts 文件还是我缺少一些设置?

Do I need to create my own .d.ts file for moment or is there just some setup piece I'm missing?

推荐答案

更新

显然，moment 现在提供了自己的类型定义(根据 sivabudh 至少从 2.14.1 开始)，因此您根本不需要 typings 或 @types.

Apparently, moment now provides its own type definitions (according to sivabudh at least from 2.14.1 upwards), thus you do not need typings or @types at all.

import * as moment from 'moment' 应该加载 npm 包提供的类型定义.

import * as moment from 'moment' should load the type definitions provided with the npm package.

话虽如此，正如 moment/pull/3319# 中所说issuecomment-263752265 团队似乎在维护这些定义时遇到了一些问题(他们仍在寻找维护它们的人).

That said however, as said in moment/pull/3319#issuecomment-263752265 the moment team seems to have some issues in maintaining those definitions (they are still searching someone who maintains them).

您需要安装没有 --ambient 标志的 moment 类型.

You need to install moment typings without the --ambient flag.

然后使用 import * as moment from 'moment'

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