1. Parent page window.open() opens a new page
var targetWeb=null; if(targetWeb){ targetWeb.focus(); }else{ targetWeb=window.open('https://segmentfault.com','segmentfault'); }2. Close the parent page in the child page
window.opener.close();If it is found that the child page cannot close the parent page, it will prompt: Scripts may close only the windows that were opened by it
But if it is replaced with: window.opener.location.href='https://www.hao123. com' but it works, what is the reason
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The close method can only close the window opened by itself
");
myWindow.focus();
myWindow.opener.document.write("This is the parent window");
myWindow.close();
可以关掉子窗口，在子窗口中无效。