ResizeObserver 对象复用 about size-sensor HOT 3 CLOSED

const sizeChanged = currentSize => {
    // compare currentSize with oldSize
};

const resizeObserver = new ResizeObserver(entries => {
    // loop in all observed elements
    for (let entry of entries) {
        // we have to diff the size change by ourselves
        if (sizeChanged(entry.contentRect)) {
            // invoke corresponding callbacks
        }
    }
});