Use // eslint-disable-next-line to ignore the next line. Use /* eslint-disable */ to ignore all warnings in a file.

To ignore the next line in JavaScript for ESLint, you can use the `// eslint-disable-next-line` comment. Here's an example:

// eslint-disable-next-line
console.log('This line will be ignored by ESLint');

To ignore all warnings in a file, you can use the `/* eslint-disable */` comment at the top of the file or before the section you want to ignore. Here's an example:

/* eslint-disable */

console.log('This file will ignore all ESLint warnings');

// Some code here

/* eslint-enable */

Please note that while disabling ESLint warnings can be useful in some cases, it's generally recommended to address and fix the issues reported by ESLint for better code quality.