TSLint Errors Update: The configuration provided cannot locate implementations for the following rules

After upgrading my tslint to version 4.0.2, I encountered numerous errors like the ones shown below:

Could not find implementations for the following rules specified in the configuration:
    directive-selector-name
    component-selector-name
    directive-selector-type
    component-selector-type
    directive-selector-prefix
    component-selector-prefix
    label-undefined
    no-constructor-vars
    no-duplicate-key
    no-unreachable
    use-strict

I suspect that my tslint.json file may be outdated and needs to be updated, but I have been unable to find any guidance on how to do so or even confirm if my assumption is correct.

tslint.json

{
  "rulesDirectory": [
    "node_modules/codelyzer"
  ],
  "rules": {
    // list of rules
  }
}

packages.json

{
  // package dependencies and devDependencies listed here
}

Answer №1

Having faced a similar situation, I can share my experience with upgrading tslint from version 3.15.1 to 4.0.2. While my list of "broken rules" may differ from yours, I have some fixes and explanations that we both encountered.

To address the broken rules, I went through tslint's changelog on GitHub, identified the problematic rule, noted down the issue number listed at the end of the line, and looked up the corresponding issue using the GitHub issue URL format. For example, linking label-undefined was done by visiting http//github.com/palantir/tslint/issues/877.

Here are the resolutions for the issues I encountered:

  • label-undefined -> The typescript compiler now handles this; hence, remove "label-undefined": true from tslint.json and add "allowUnusedLabels": false to the compilerOptions section in the tsconfig.json file.
  • no-constructor-vars -> This rule has been renamed; update "no-constructor-vars" to "no-parameter-properties" in your tslint.json.
  • no-duplicate-key -> Since typescript manages duplicate keys during compilation, you can remove "no-duplicate-key": true entirely.
  • no-unreachable -> Typescript compiler now addresses this issue; delete "no-unreachable": true from tslint.json and include "noImplicitReturns": true in the compilerOptions section of your tsconfig.json.
  • use-strict -> As typescript parses all module bodies in strict mode, there is no need to specify the "use-strict" rule.

Answer №2

With the release of codelyzer 2.0.0-beta.1, several significant changes have been made. The directives and components selectors named directive-selector-name, component-selector-name, directive-selector-type, component-selector-type, directive-selector-prefix, and component-selector-prefix have been removed and are no longer supported. Instead, they have introduced the following new rule:

"directive-selector": [true, "attribute", "app", "camelCase"],
"component-selector": [true, "element", "app", "kebab-case"],

Please refer to the changelog for codelyzer to check for any unsupported rules.

Answer №3

Recent updates in tslint version 4 have streamlined the rules to only include those that remain relevant, leading to enhanced TypeScript checking capabilities. If you still require access to the deprecated rules, it is advised to stick with tslint version 3.

Answer №4

Encountered a similar issue when transferring rules from an Angular project. Solution: Start a fresh TypeScript project, and the problem should resolve itself.

Answer №5

Encountering the same problem of receiving

Could not find implementations for the following rules...
warnings in my IDE, Visual Studio Code 2021.x was quite frustrating. Upon investigation, I discovered that the rule implementations were actually provided by the IDE itself, and updating Visual Studio Code resolved the issue.

I tried upgrading Typescript, TSLint & Codelyzer without success. Even after examining my tslint.json file thoroughly, I found no solution. However, a simple upgrade to Visual Studio Code solved the problem effortlessly.

Answer №6

When I encountered a similar problem following an update to my Angular project, the solution for me was simply deleting the following rule:

"no-misused-new"

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