Function loadStyleSheet

packages/less/lib/less-browser/index.js:84–144

(sheet, callback, reload, remaining, modifyVars)

    }

    function loadStyleSheet(sheet, callback, reload, remaining, modifyVars) {

        const instanceOptions = clone(options);
        addDataAttr(instanceOptions, sheet);
        instanceOptions.mime = sheet.type;

        if (modifyVars) {
            instanceOptions.modifyVars = modifyVars;
        }

        function loadInitialFileCallback(loadedFile) {
            const data = loadedFile.contents;
            const path = loadedFile.filename;
            const webInfo = loadedFile.webInfo;

            const newFileInfo = {
                currentDirectory: fileManager.getPath(path),
                filename: path,
                rootFilename: path,
                rewriteUrls: instanceOptions.rewriteUrls
            };

            newFileInfo.entryPath = newFileInfo.currentDirectory;
            newFileInfo.rootpath = instanceOptions.rootpath || newFileInfo.currentDirectory;

            if (webInfo) {
                webInfo.remaining = remaining;

                const css = cache.getCSS(path, webInfo, instanceOptions.modifyVars);
                if (!reload && css) {
                    webInfo.local = true;
                    callback(null, css, data, sheet, webInfo, path);
                    return;
                }

            }

            // TODO add tests around how this behaves when reloading
            errors.remove(path);

            instanceOptions.rootFileInfo = newFileInfo;
            less.render(data, instanceOptions, (e, result) => {
                if (e) {
                    e.href = path;
                    callback(e);
                } else {
                    cache.setCSS(sheet.href, webInfo.lastModified, instanceOptions.modifyVars, result.css);
                    callback(null, result.css, data, sheet, webInfo, path);
                }
            });
        }

        fileManager.loadFile(sheet.href, null, instanceOptions, environment)
            .then(loadedFile => {
                loadInitialFileCallback(loadedFile);
            }).catch(err => {
                console.log(err);
                callback(err);