city-casereport/miniprogram_npm/tdesign-miniprogram/common/wechat.js

export const getObserver = (context, selector) => {
    return new Promise((resolve, reject) => {
        wx.createIntersectionObserver(context)
            .relativeToViewport()
            .observe(selector, (res) => {
            resolve(res);
        });
    });
};