fix(web): 修复存在多个根结点时 createIntersectionObserver 无效的问题 (question/191660)

[chouchouji]

关联帖子

https://ask.dcloud.net.cn/question/191660

[github-actions]

Size report

Path	Size
packages/size-check/dist/size-check.es.js	47.11 KB (0%)
packages/size-check/dist/style.css	2.81 KB (0%)
packages/uni-app/dist/uni-app.es.js	2.47 KB (0%)
packages/uni-h5-vue/dist/vue.runtime.esm.js	76.41 KB (0%)
packages/uni-mp-vue/dist/vue.runtime.esm.js	43.13 KB (0%)
packages/uni-mp-alipay/dist/uni.api.esm.js	14.69 KB (0%)
packages/uni-mp-alipay/dist/uni.mp.esm.js	7.99 KB (0%)
packages/uni-mp-baidu/dist/uni.api.esm.js	11.34 KB (0%)
packages/uni-mp-baidu/dist/uni.mp.esm.js	9.68 KB (0%)
packages/uni-mp-qq/dist/uni.api.esm.js	10.65 KB (0%)
packages/uni-mp-qq/dist/uni.mp.esm.js	7.6 KB (0%)
packages/uni-mp-toutiao/dist/uni.api.esm.js	10.53 KB (0%)
packages/uni-mp-toutiao/dist/uni.mp.esm.js	9.42 KB (0%)
packages/uni-mp-weixin/dist/uni.api.esm.js	11.66 KB (0%)
packages/uni-mp-weixin/dist/uni.mp.esm.js	7.94 KB (0%)
packages/uni-quickapp-webview/dist/uni.api.esm.js	10.6 KB (0%)
packages/uni-quickapp-webview/dist/uni.mp.esm.js	8.16 KB (0%)