@hint/hint-minified-js/dist/src/hint.js

hint that that checks if the JavaScript used by the web page is minified

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const utils_debug_1 = require("@hint/utils-debug");
const utils_types_1 = require("@hint/utils-types");
const meta_1 = require("./meta");
const i18n_import_1 = require("./i18n.import");
const debug = (0, utils_debug_1.debug)(__filename);
class MinifiedJsHint {
    constructor(context) {
        let threshold = 75;
        if (context.hintOptions && context.hintOptions.threshold) {
            threshold = context.hintOptions.threshold;
        }
        const getImprovementIndex = ({ sourceCode, tokens }) => {
            const contentLength = sourceCode.length;
            const tokenRatio = tokens.length / contentLength;
            return Math.round((1 - tokenRatio) * 100);
        };
        const validateContentMinified = (scriptData) => {
            const { element, resource, sourceCode } = scriptData;
            const improvementIndex = getImprovementIndex(scriptData);
            if (sourceCode.length < 1024) {
                debug(`Ignoring minification for script under 1KB: ${resource}`);
                return;
            }
            debug(`Calculated improvementIndex for ${resource}: ${improvementIndex}`);
            if (improvementIndex > threshold) {
                context.report(resource, (0, i18n_import_1.getMessage)('shouldBeMinified', context.language), {
                    element,
                    severity: utils_types_1.Severity.warning
                });
            }
        };
        context.on('parse::end::javascript', validateContentMinified);
    }
}
exports.default = MinifiedJsHint;
MinifiedJsHint.meta = meta_1.default;