Function require

test/lib/simpleRequire.js:230–261

(depsIds, cb)

    var pendingRequireCallbackParams = [];
    var requireCount = 0;
    function require(depsIds, cb) {
        if (typeof depsIds === 'string') {
            depsIds = [depsIds];
        }
        // Batch multiple requires callback theme in one frame.
        // Ensure all instances are started at one time and avoid time difference in visual regression test
        var cbIdx = requireCount;
        pendingRequireCallbacks.push(cb);
        requireCount++;

        loadDeps(depsIds).then(function (deps) {
            pendingRequireCallbackParams[cbIdx] = deps;
            requireCount--;

            if (requireCount === 0) {   // Flush
                var requireCallbackToFlush = pendingRequireCallbacks;
                var requireCallbackParamsToFlush = pendingRequireCallbackParams;
                // Clear before flush. Avoid more require in the callback.
                pendingRequireCallbacks = [];
                pendingRequireCallbackParams = [];

                // Start visual regression test before callback
                if (typeof __VRT_START__ !== 'undefined') {
                    __VRT_START__();
                }

                for (var i = 0; i < requireCallbackToFlush.length; i++) {
                    requireCallbackToFlush[i] && requireCallbackToFlush[i].apply(null, requireCallbackParamsToFlush[i]);
                }
            }
        });
    }

    require.config = function (cfg) {
        requireCfg = cfg || {};