[Fixed] Error: ESLint couldn't find the config "plugin:@typescript-eslint/recommended-type-checked" to extend from – Eslint

The Problem:

An individual is attempting to use the "no-floating-promises" rule with TypeScript, but an error is encountered stating that "ESLint couldn’t find the config "plugin:@typescript-eslint/recommended-type-checked" to extend from." despite adding it to the ".eslintrc.json" file. Modifications to "parserOptions" have been made without resolving the issue.

The Solutions:

Solution 1: Prefix the rule name with the plugin name

When using a rule from a plugin, you need to prefix the rule name with the plugin name. In this case, the rule is no-floating-promises from the @typescript-eslint plugin, so the correct way to enable it is:

{
  "rules": {
    "@typescript-eslint/no-floating-promises": "warn"
  }
}

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