'; document.write(scriptText); } } else if (tagName === 'link') { if (target.rel === 'stylesheet') { newUrl = getNewUrl(target.href); if (newUrl) { target.href = newUrl; } } } }; //css文件自动重试 window.addEventListener( 'error', function (event) { if (!event.message && event.target) { var target = event.target; if ( target.tagName.toLowerCase() === 'link' && target.getAttribute('rel') === 'stylesheet' && !!target.href ) { __CDN_RELOAD__(target) } } }, true //资源加载错误事件,因为不会冒泡,必须在捕获阶段执行 );