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typescript - 更新 Deno 后的 Typescript 导入问题

问题描述

我最近将 deno 从 v1.3.0 更新到 v1.4.0。在更新之前，我的代码没有任何问题，但之后我有这个错误：

error: TS1205 [ERROR]: Re-exporting a type when the '--isolatedModules' flag is provided requires using 'export type'.
  LevelName,
  ~~~~~~~~~
    at https://deno.land/x/branch@0.0.2/deps.ts:8:3

TS1205 [ERROR]: Re-exporting a type when the '--isolatedModules' flag is provided requires using 'export type'.
export { LogConfig, setup, prefix } from "./branch.ts";
         ~~~~~~~~~
    at https://deno.land/x/branch@0.0.2/mod.ts:3:10

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { WatcherConfig } from "./watcher.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/config.ts:14:1

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { RunnerConfig } from "./runner.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/config.ts:15:1

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { Args } from "./args.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/config.ts:18:1

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { Template } from "./templates.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/config.ts:19:1

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { Denon, DenonEvent } from "../denon.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/daemon.ts:5:1

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { CompleteDenonConfig } from "./config.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/daemon.ts:6:1

TS1371 [ERROR]: This import is never used as a value and must use 'import type' because the 'importsNotUsedAsValues' is set to 'error'.
import { ScriptOptions } from "./scripts.ts";
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    at https://deno.land/x/denon@2.3.3/src/daemon.ts:7:1

我找到了解决此问题的页面，但此错误看起来像是来自第三方库。我还使用 Denon 来运行脚本。这是我导入的包：

import { Application } from "https://deno.land/x/oak/mod.ts";
import { oakCors } from "https://deno.land/x/cors/mod.ts";
import { Router } from "https://deno.land/x/oak/mod.ts";
import { RouterContext } from "https://deno.land/x/oak/mod.ts";
import * as bcrypt from "https://deno.land/x/bcrypt/mod.ts";
import { SmtpClient } from "https://deno.land/x/smtp/mod.ts";
import { MongoClient } from "https://deno.land/x/mongo@v0.11.1/mod.ts";

这是我的denon.json：

{
  "$schema": "https://deno.land/x/denon/schema.json",
  "scripts": {
    "start": {
      "cmd": "deno run --unstable server.ts",
      "allow": [
        "net",
        "write",
        "read",
        "plugin"
      ]
    }
  }
}

有没有办法来解决这个问题？还是降级 Deno 的方法？

标签： typescriptdeno

解决方案

Deno v1.4.0 中添加了一个不稳定的功能。https://github.com/denoland/deno/pull/7413。这里有一个类似的问题https://github.com/Jozty/Fae/issues/32这将由库作者修复，或者您可以通过修复来提高 PR。临时解决方法是将 Deno 降级到 v1.3.0

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