@kademi/keditor/src/keditor/utils/enterFullscreen.js

KEditor is a jQuery plugin which provides a content editor with drag n drop, configurable contents

export default (el) => {
    if (el.requestFullscreen) {
        el.requestFullscreen();
    } else if (el.mozRequestFullScreen) { /* Firefox */
        el.mozRequestFullScreen();
    } else if (el.webkitRequestFullscreen) { /* Chrome, Safari and Opera */
        el.webkitRequestFullscreen();
    } else if (el.msRequestFullscreen) { /* IE/Edge */
        el.msRequestFullscreen();
    }
};