java script 模拟鼠标事件

try {

　　var selector1 = "._3-8y:first-child";

　　var evt = document.createEvent("MouseEvents");

　　var selector = document.querySelectorAll("._3-8y:first-child")[0];

　　console.log(selector)

　　var center_x = 2,

　　center_y = 2;

　　var type = 'mouseover';

try {

　　var pos = selector.getBoundingClientRect();

　　center_x = Math.floor((pos.left + pos.right) / 2);

　　center_y = Math.floor((pos.top + pos.bottom) / 2);

　　console.log("center_x", center_x);

　　console.log("center_y", center_y);

} catch (e) {}

　　evt.initMouseEvent('mouseover', true, true, window, 1, 1, 1, 1326, 157, false, false, false, false, 0, selector);

　　// dispatchEvent return value is false if at least one of the event

　　// handlers which handled this event called preventDefault;　　

　　// so we cannot returns this results as it cannot accurately informs on the status

　　// of the operation

　　// let's assume the event has been sent ok it didn't raise any error

　　selector.dispatchEvent(evt);

　　

//second

　　var selector1 = "._3-8y:first-child";

　　var evt = document.createEvent("MouseEvents");

　　var selector = document.querySelectorAll("._3-8y:first-child")[0];

　　console.log(selector)

　　var center_x = 2,

　　center_y = 2;

　　var type = 'mouseover';

try {

　　var pos = selector.getBoundingClientRect();

　　center_x = Math.floor((pos.left + pos.right) / 2);

　　center_y = Math.floor((pos.top + pos.bottom) / 2);

　　console.log("center_x", center_x);

　　console.log("center_y", center_y);

} catch (e) {}

　　evt.initMouseEvent('mouseout', true, true, window, 1, 1, 1, 1326, 155, false, false, false, false, 0, selector);

　　// dispatchEvent return value is false if at least one of the event

　　// handlers which handled this event called preventDefault;

　　// so we cannot returns this results as it cannot accurately informs on the status

　　// of the operation

　　// let's assume the event has been sent ok it didn't raise any error

　　selector.dispatchEvent(evt);

　　//second

　　// return true;

} catch (e) {

　　console.log("Failed dispatching " + type + "mouse event on " + selector + ": " + e, "error");

　　// return false;

}

//

相关链接：

https://stackoverflow.com/questions/28672152/pass-an-event-to-an-iframe-from-the-parent-window-javascript

 

var iframe = document.getElementById('something');
var iframeEvent = new Event('iframe-keypress');

document.addEventListener('keypress', function (e) {
    iframe.dispatchEvent(iframeEvent);
});

iframe.addEventListener('iframe-keypress', function (e) {
    console.log(e);
});

https://www.3till7.net/2014/08/09/triggering-events-in-an-iframe/index.html

// parent page's JavaScript
var iframe = $('iframe');
var iframe_select = iframe.contents().find('select#menu');
iframe_select.val(value);
var ev = iframe[0].contentWindow.document.createEvent('UIEvents');
ev.initUIEvent('change', true, true, window, 1);
iframe_select[0].dispatchEvent(ev);