no-trailing-spaces.js

/**
 * @fileoverview Disallow trailing spaces at the end of lines.
 * @author Nodeca Team <https://github.com/nodeca>
 */
"use strict";

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

const astUtils = require("./utils/ast-utils");

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

module.exports = {
    meta: {
        type: "layout",

        docs: {
            description: "disallow trailing whitespace at the end of lines",
            category: "Stylistic Issues",
            recommended: false,
            url: "https://eslint.org/docs/rules/no-trailing-spaces"
        },

        fixable: "whitespace",

        schema: [
            {
                type: "object",
                properties: {
                    skipBlankLines: {
                        type: "boolean",
                        default: false
                    },
                    ignoreComments: {
                        type: "boolean",
                        default: false
                    }
                },
                additionalProperties: false
            }
        ],

        messages: {
            trailingSpace: "Trailing spaces not allowed."
        }
    },

    create(context) {
        const sourceCode = context.getSourceCode();

        const BLANK_CLASS = "[ \t\u00a0\u2000-\u200b\u3000]",
            SKIP_BLANK = `^${BLANK_CLASS}*$`,
            NONBLANK = `${BLANK_CLASS}+$`;

        const options = context.options[0] || {},
            skipBlankLines = options.skipBlankLines || false,
            ignoreComments = options.ignoreComments || false;

        /**
         * Report the error message
         * @param {ASTNode} node node to report
         * @param {int[]} location range information
         * @param {int[]} fixRange Range based on the whole program
         * @returns {void}
         */
        function report(node, location, fixRange) {