Definition: The JavaScript variable `.eslint-trc.js` contains configuration data for ESLint with options for Travis CI. It's useful to customize or maintain the linting strategy within Travis CI. Detailed definition: `.eslint-trc.js` is a file used by ESLint, a popular tool for JavaScript code evaluation and linting. This file stores configuration settings for managing rulesets and configurations in Travis CI. The `.eslint-trc.js` file includes options to customize the ESLint configuration, such as specifying which files should be included in the rule set and which test cases are being used. It's essential for maintaining a consistent linting strategy across different builds of the codebase.