angular 和js的一些事件：
(focus)="method()"
(blur)="method()"(submit)="method()"
(scroll)="method()"
(cut)="method()"
(copy)="method()"
(paste)="method()"
(keydown)="method()"
(keypress)="method()"
(keyup)="method()"
(mouseenter)="myMethod()"
(mousedown)="myMethod()"
(mouseup)="myMethod()"
(click)="myMethod()"
(dblclick)="myMethod()"
(drag)="myMethod()"
(dragover)="myMethod()"
(drop)="myMethod()"
