eslint-plugin-lodash/lib/rules/prefer-startswith.js

Lodash specific linting rules for ESLint

/**
 * @fileoverview Rule to check if a call to _.indexOf === 0 should be a call to _.startsWith
 */
'use strict';

/**
 * @fileoverview Rule to check if a call to _.indexOf === 0 should be a call to _.startsWith
 */
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

module.exports = {
    create: function create(context) {
        var _require = require('../util/astUtil');

        var isIndexOfCall = _require.isIndexOfCall;
        var getExpressionComparedToInt = _require.getExpressionComparedToInt;

        return {
            BinaryExpression: function BinaryExpression(node) {
                if (isIndexOfCall(getExpressionComparedToInt(node, 0))) {
                    context.report(node, 'Prefer _.startsWith instead of comparing indexOf() to 0');
                }
            }
        };
    }
};