错误
我收到这个打字稿错误:
error TS2403: Subsequent variable declarations must have the same type. Variable ‘environment’ must be of type ‘string’, but here has type ‘any’.
码
的package.json
...
"typescript": "^1.8.10",
...
server.ts
var environment = require('./config/config.js')()
./config/config.ts
module.exports = function(): string {
//Environment
let env:string = process.env.NODE_ENV || 'development'
return env
}
题:
我需要做什么才能将函数的返回值识别为字符串?
编辑
tsconfig
{
"compilerOptions": {
"target": "ES5",
"module": "system",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"moduleResolution": "node",
"removeComments": false,
"noImplicitAny": true,
"suppressImplicitAnyIndexErrors": true
},
"exclude": [
"node_modules",
"typings/main",
"typings/main.d.ts"
]
}
安装节点
我添加了一个typings.json
{
"globalDependencies": {
"core-js": "registry:dt/core-js#0.0.0+20160602141332",
"jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
"node": "registry:dt/node#6.0.0+20160621231320"
}
}
而且我记得使用tsd安装.我有一个名为typings的文件夹,在该文件夹中是另一个名为node的文件夹,带有index.d.ts.我假设这与node.d.ts相同?
编辑2
gulp for frontend(angularjs)和backend(nodejs)
const gulp = require('gulp');
const gutil = require('gulp-util');
const paths = gulp.paths;
var $= require('gulp-load-plugins')();
const tscConfig = require('../tsconfig.json');
gulp.task('scripts-frontend', function () {
gulp.src(paths.src + '/systemjs.config.js')
.pipe(gulp.dest(paths.out + '/'));
return gulp.src([paths.src + '/frontend/**/*.ts', paths.typings + '/**/*', '!' + paths.src + '/**/*.spec.ts'])
.pipe($.sourcemaps.init())
.pipe($.typescript(tscConfig.compilerOptions))
.pipe($.sourcemaps.write('.'))
.pipe(gulp.dest(paths.out + '/frontend/'));
});
gulp.task('scripts-backend', function () {
return gulp.src([paths.src + '/backend/**/*.ts', paths.typings + '/**/*', paths.src + '/server.ts', '!' + paths.src + '/**/*.spec.ts'])
.pipe($.sourcemaps.init())
.pipe($.typescript(tscConfig.compilerOptions))
.pipe($.sourcemaps.write('.'))
.pipe(gulp.dest(paths.out + '/backend/'));
});
最佳答案 我看到你的文件扩展名是.ts(例如config.ts).不要在ts文件中使用var / require!引入其他ts文件尤其如此.
var environment = require(‘./ config / config.js’)()应该是:
import config = require('./config/config.js');
const environment = config();
而module.exports = function():string {应该是:
export = function(): string {
更多
https://basarat.gitbooks.io/typescript/content/docs/project/external-modules.html