[javascript] How to open a web page automatically in full screen mode

How do I open a web page automatically in full screen mode?

I am looking for a solution to open an web page automatically in full screen mode, without expecting user to users press F11 or any other browser-specifc key.

I've searched a lot, but I just could not find a solution.

Is there a script or library or browser specific API available to help me achieve this?

window.onload = function() {
    var el = document.documentElement,
        rfs = el.requestFullScreen
        || el.webkitRequestFullScreen
        || el.mozRequestFullScreen;
    rfs.call(el);
};

It's better to try to simulate a webbrowser by yourself.You don't have to stick with Chrome or IE or else thing.

If you're using Python,you can try package pyQt4 which helps you to simulate a webbrowser. By doing this,there will not be any security reasons and you can set the webbrowser to show in full screen mode automatically.

You can go fullscreen automatically by putting this code in:

var elem = document.documentElement; if (elem.requestFullscreen) { elem.requestFullscreen() }

demo: https://codepen.io/ConfidentCoding/pen/ewLyPX

note: does not always work for security reasons. but it works for me at least. does not work when inspecting and pasting the code.

Only works in IE:

window.open ("mapage.html","","fullscreen=yes");  
window.open('','_parent','');  
window.close();

<div class="container">      _x000D_
            <section class="main-content">_x000D_
                                    <center><a href="#"><button id="view-fullscreen">view full size page large</button></a><center>_x000D_
                                           <script>(function () {_x000D_
    var viewFullScreen = document.getElementById("view-fullscreen");_x000D_
    if (viewFullScreen) {_x000D_
        viewFullScreen.addEventListener("click", function () {_x000D_
            var docElm = document.documentElement;_x000D_
            if (docElm.requestFullscreen) {_x000D_
                docElm.requestFullscreen();_x000D_
            }_x000D_
            else if (docElm.mozRequestFullScreen) {_x000D_
                docElm.mozRequestFullScreen();_x000D_
            }_x000D_
            else if (docElm.webkitRequestFullScreen) {_x000D_
                docElm.webkitRequestFullScreen();_x000D_
            }_x000D_
        }, false);_x000D_
    }_x000D_
    })();</script>_x000D_
                                           </section>_x000D_
</div>

for view demo clcik here demo of click to open page in fullscreen