虚幻UE4.26 浏览器插件WebBrowser:蓝图Execute Javascript命令（经过测试）

①浏览器右键选择菜单关闭

window.oncontextmenu = function(event) {
event.preventDefault();
event.stopPropagation();
console.log("Right Click Disabled");
return false;
};

window.oncontextmenu = (e) => {
e.preventDefault();
e.stopPropagation();
console.log("Right Click Disabled");
return false;
}

②打印输出窗口

window.alert("Hello world!");

③浏览器内的按钮调用【涉及同源安全策略限制的无法访问】

var btns = document.getElementsByTagName('button');
alert(btns.length);

var btns = document.getElementsByTagName('button');
alert(btns.length);btns[3].onclick();

var btns = document.getElementsByTagName('button');
alert(btns[0]);

测试web端下载：https://download.csdn.net/download/weixin_47428955/85451662?spm=1001.2014.3001.5503
④另一个网址【本网址受到同源策略阻止只有部分元素能访问】
https://view.officeapps.live.com/op/view.aspx?src=http://mczaiyun.top/ht/2.ppt

var btns = document.getElementById('load_img');
alert(btns);

以及“wacframe”参数也能调用

var sumDocument= document.getElementById('wacframe');;
alert(sumDocument);