获取键盘的高度使得工具条吸附键盘于不同浏览器的方法

对于苹果 Safari

检测 viewsualViewport 的 resize 事件, 用两个 viewsualViewport.height 作差得键盘高度.

对于新版本 Chrome

使用 virtualKeyboardApi.

if((window.navigator as any).virtualKeyboard) {
    const virtualKeyboardApi = (window.navigator as any).virtualKeyboard;
    virtualKeyboardApi.overlaysContent = true;
    virtualKeyboardApi.addEventListener('geometrychange', (e: any) => {
        const ctx = $.mobileEditBar.getContext();
        const ref = ctx.ref as unknown as HTMLElement;
        const height = virtualKeyboardApi.boundingRect.height ?? 0;
        ref.style.display = height > 0 ? 'block' : 'none';
    });
}