Error encountered in lodash.js in Angular 2 framework

I have been attempting to implement lodash for a datatable. Here are the steps I followed:

  • First, I tried running npm install lodash, but encountered an error stating that the package could not be found

  • After researching the issue, I attempted npm install --save @types/lodash

This led to the following output:

+-- UNMET DEPENDENCY @angular/common@~2.1.0
+-- UNMET PEER DEPENDENCY @angular/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bad9d5d7caf3d4da87cade">[email protected]/a> invalid
+-- UNMET DEPENDENCY @angular/core@~2.1.0
`-- @types/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="523e3d3633213a12667c6">[email protected]"] /a>

I am confused by this result since my package.json contains the following:

"@angular/common": "~2.1.0",
"@angular/compiler": "~2.1.0",
"@angular/core": "~2.1.0",

  • Despite being able to locate the package in my IDE, when I try to run npm start/ng serve, I encounter multiple errors:

    ERROR in [default] path\node_modules\@types\lodash\index.d.ts:192 81:20 Cannot find namespace '_'.

    ERROR in [default] path\node_modules\@types\lodash\index.d.ts:190 21:57 Cannot find name 'Many'.

    ERROR in [default] path\node_modules\@types\lodash\index.d.ts:194 41:0 Declaration or statement expected.

These first two errors are repeated several times with different line numbers each time

What steps should I take to resolve this issue?

node.jsangularnpmlodash

Answer №1

This issue arises when you try to install an outdated module listed in your package.json file, but it no longer exists on git due to updates in their versioning system. To resolve this problem,

1. First, ensure you have installed the project’s local dependencies (such as lodash) by navigating to the project directory and running npm install.
2. You can also attempt to install lodash by using the command: npm i --save lodash.
3. If the package.json file includes the lodash dependency, consider deleting the node_modules folder and executing the following commands:
$ npm cache clean
$ npm install

The initial command cleans the npm cache for good measure, while the latter command reinstalls all missing dependencies for the project.

Answer №2

After encountering some technical difficulties, I decided to borrow the package.json file from a functioning project and execute npm install. It remains a mystery as to why my original method failed, but utilizing this alternative approach successfully resolved the problem.

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