¶

window.customElements＝ ／[Edge]

＝[object]：[object CustomElementRegistry]

define＝[function]：function define() { [native code] }

get＝[function]：function get() { [native code] }

upgrade＝[function]：function upgrade() { [native code] }

whenDefined＝[function]：function whenDefined() { [native code] }