use web_sys;
pub fn window() -> web_sys::Window {
web_sys::window().expect("no window")
}
pub fn document() -> web_sys::Document {
window().document().expect("no document")
}
pub fn body() -> web_sys::HtmlElement {
document().body().expect("no have body")
}
pub fn create_element(tag: &str) -> web_sys::Element {
document()
.create_element(tag)
.expect(format!("no create element {}", tag).as_str())
}