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console.log(err);\n callback(err);\n });\n\n }\n\n function loadStyleSheets(callback, reload, modifyVars) {\n for (let i = 0; i < less.sheets.length; i++) {\n loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1), modifyVars);\n }\n }\n\n function initRunningMode() {\n if (less.env === 'development') {\n less.watchTimer = setInterval(() => {\n if (less.watchMode) {\n fileManager.clearFileCache();\n /**\n * @todo remove when this is typed with JSDoc\n */\n // eslint-disable-next-line no-unused-vars\n loadStyleSheets((e, css, _, sheet, webInfo) => {\n if (e) {\n errors.add(e, e.href || sheet.href);\n } else if (css) {\n browser.createCSS(window.document, css, sheet);\n }\n });\n }\n }, options.poll);\n }\n }\n\n //\n // Watch mode\n //\n less.watch = function () {\n if (!less.watchMode ) {\n less.env = 'development';\n initRunningMode();\n }\n this.watchMode = true;\n return true;\n };\n\n less.unwatch = function () {clearInterval(less.watchTimer); this.watchMode = false; return false; };\n\n //\n // Synchronously get all <link> tags with the 'rel' attribute set to\n // \"stylesheet/less\".\n //\n less.registerStylesheetsImmediately = () => {\n const links = document.getElementsByTagName('link');\n less.sheets = [];\n\n for (let i = 0; i < links.length; i++) {\n if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) &&\n (links[i].type.match(typePattern)))) {\n less.sheets.push(links[i]);\n }\n }\n };\n\n //\n // Asynchronously get all <link> tags with the 'rel' attribute set to\n // \"stylesheet/less\", returning a Promise.\n //\n less.registerStylesheets = () => new Promise((resolve) => {\n less.registerStylesheetsImmediately();\n resolve();\n });\n\n //\n // With this function, it's possible to alter variables and re-render\n // CSS without reloading less-files\n //\n less.modifyVars = record => less.refresh(true, record, false);\n\n less.refresh = (reload, modifyVars, clearFileCache) => {\n if ((reload || clearFileCache) && clearFileCache !== false) {\n fileManager.clearFileCache();\n }\n return new Promise((resolve, reject) => {\n let startTime;\n let endTime;\n let totalMilliseconds;\n let remainingSheets;\n startTime = endTime = new Date();\n\n // Set counter for remaining unprocessed sheets\n remainingSheets = less.sheets.length;\n\n if (remainingSheets === 0) {\n\n endTime = new Date();\n totalMilliseconds = endTime - startTime;\n less.logger.info('Less has finished and no sheets were loaded.');\n resolve({\n startTime,\n endTime,\n totalMilliseconds,\n sheets: less.sheets.length\n });\n\n } else {\n // Relies on less.sheets array, callback seems to be guaranteed to be called for every element of the array\n loadStyleSheets((e, css, _, sheet, webInfo) => {\n if (e) {\n errors.add(e, e.href || sheet.href);\n reject(e);\n return;\n }\n if (webInfo.local) {\n less.logger.info(`Loading ${sheet.href} from cache.`);\n } else {\n less.logger.info(`Rendered ${sheet.href} successfully.`);\n }\n browser.createCSS(window.document, css, sheet);\n less.logger.info(`CSS for ${sheet.href} generated in ${new Date() - endTime}ms`);\n\n // Count completed sheet\n remainingSheets--;\n\n // Check if the last remaining sheet was processed and then call the promise\n if (remainingSheets === 0) {\n totalMilliseconds = new Date() - startTime;\n less.logger.info(`Less has finished. CSS generated in ${totalMilliseconds}ms`);\n resolve({\n startTime,\n endTime,\n totalMilliseconds,\n sheets: less.sheets.length\n });\n }\n endTime = new Date();\n }, reload, modifyVars);\n }\n\n loadStyles(modifyVars);\n });\n };\n\n less.refreshStyles = loadStyles;\n return less;\n};\n"]}
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