eslint-plugin-unicorn/rules/fix/append-argument.js

More than 100 powerful ESLint rules

import {isCommaToken} from '@eslint-community/eslint-utils';

export default function appendArgument(fixer, node, text, sourceCode) {
	// This function should also work for `NewExpression`
	// But parentheses of `NewExpression` could be omitted, add this check to prevent accident use on it
	/* c8 ignore next 3 */
	if (node.type !== 'CallExpression') {
		throw new Error(`Unexpected node "${node.type}".`);
	}

	const [penultimateToken, lastToken] = sourceCode.getLastTokens(node, 2);
	if (node.arguments.length > 0) {
		text = isCommaToken(penultimateToken) ? ` ${text},` : `, ${text}`;
	}

	return fixer.insertTextBefore(lastToken, text);
}