我在VSCode中收到以下.ts
文件(红线)错误:
src \ lib \ hi.ts
import * as _ from 'lodash';
function testLodash(): void {
function square(n: number) {
return n * n;
}
return _.map([4, 8], square);
}
错误
Property 'map' does not exist on type 'typeof import("lodash")'.ts(2339)
对于任何常用的lodash函数,我都会遇到相同的错误。通过Lodash
调用时,Intellisense仅给我提供_.
类。
我猜想VSCode找不到我的类型定义,但我看不到为什么。
如果我将导入更改为:
import 'lodash';
我得到了预期的功能,但错误消失了,但是又出现了新的错误:
'_' refers to a UMD global, but the current file is a module. Consider adding an import instead.ts(2686)
应用建议的QuickFix将以下内容添加到导入中:
import _ from 'lodash';
但是随后我又得到了原始错误。
那么我需要做些什么才能使它起作用?
以下是详细信息:
package.json
{
...
"dependencies": {
...
"lodash": "^4.17.11",
...
},
"devDependencies": {
...
"@types/lodash": "^4.14.130",
...
"typescript": "^3.4.5"
}
}
tsconfig.json
{
"compilerOptions": {
"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
"module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
"allowJs": true, /* Allow javascript files to be compiled. */
"outDir": "./dist/", /* Redirect output structure to the directory. */
"strict": true, /* Enable all strict type-checking options. */
"esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
}
}
VSCode设置
没有非默认的TS设置
TS版本
版本3.4.5
VSCode版本
Version: 1.34.0 (user setup)
Commit: a622c65b2c713c890fcf4fbf07cf34049d5fe758
Date: 2019-05-15T21:59:37.030Z
Electron: 3.1.8
Chrome: 66.0.3359.181
Node.js: 10.2.0
V8: 6.6.346.32
OS: Windows_NT x64 10.0.17134
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答案 0 :(得分:1)
我有同样的问题,我通过这种方式解决了这个问题:
const _ = require('lodash');