Question 291098 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – how to check if a tab opened using window.open() is still running or shut or refreshed?

 const newWindow = window.open(
      "",
      "_blank",
      "width=800,height=600,left=2000,top=0"
    );

    if (newWindow) {
      const specificDivContent = document.getElementById(
        `slide-${slideIndex}`
      ).innerHTML;

above is the code i am using to create a new tab and write an existing div onto that tab. i would like to call an api when the new window that is opened is refreshed or closed.
tried using these listeners below.

 window.addEventListener("beforeunload", function(event) {
    // Prevent the user from leaving the page.
    console.log('tried closing the window')
    event.preventDefault();
  });
  
  function checkWindowClosed() {
    if (window.closed) {
      console.log('window closed')
    } else console.log('still open')
  }
  
  setInterval(checkWindowClosed, 1000);
Tags:

2

Answers


  1. 0

    want to add the listener to the newWindow you created using window.open()?

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  2. 0

    With a little error checking we’ll know if accessing the window is successful…

    try{

 newWindow.document.body.appendChild('<div>hello</div>'); // or some other operation

} catch(e){

 alert(e);

}
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