引用requirejs,网速不好时，会提示require is not defined

<code>require.config({
        baseUrl: '<?php echo $this->config->base_url(); ?>',
        paths: {
            jquery: 'assets/js/jquery.min',
            bootstrap: 'assets/js/bootstrap.min',
            fastclick: 'assets/js/fastclick',
            swal: 'assets/js/sweet-alert',
            bootstrapSelect: 'assets/js/bootstrap-select.min',
            ueditorConfig: 'assets/js/ueditor/ueditor.config',
            ueditor: 'assets/js/ueditor/ueditor.all.min',
            domReady: 'assets/js/domReady'
        },
        shim: {
            bootstrap: {
            deps: ['jquery'],
            exports: 'bootstrap'
            }
        },
        urlArgs: 'v=' + (new Date()).getTime()
    });


    require(['domReady'],function(domReady){
        domReady(function(){
            console.log('aaa');
        });
    });
    // Uncaught ReferenceError: require is not defined
</code>

<code>require.config({
        baseUrl: '<?php echo $this->config->base_url(); ?>',
        paths: {
            jquery: 'assets/js/jquery.min',
            bootstrap: 'assets/js/bootstrap.min',
            fastclick: 'assets/js/fastclick',
            swal: 'assets/js/sweet-alert',
            bootstrapSelect: 'assets/js/bootstrap-select.min',
            ueditorConfig: 'assets/js/ueditor/ueditor.config',
            ueditor: 'assets/js/ueditor/ueditor.all.min',
            domReady: 'assets/js/domReady'
        },
        shim: {
            bootstrap: {
            deps: ['jquery'],
            exports: 'bootstrap'
            }
        },
        urlArgs: 'v=' + (new Date()).getTime()
    });


    require(['domReady'],function(domReady){
        domReady(function(){
            console.log('aaa');
        });
    });
    // Uncaught ReferenceError: require is not defined
</code>