In full screen mode, I think the easiest way is to use a library, for example screenfull.js - https://github.com/sindresorhus/screenfull.js/
Regarding adding custom buttons to the Quill toolbar, I found two ways.
Method 1:
. - :
http://codepen.io/nik10110/pen/PbyNoW
<div id="editor"></div>
<style>
#editor {
height: 375px;
}
.ql-omega:after {
content: "Ω";
}
</style>
<script type="text/javascript">
var toolbarOptions = [
[{ 'font': [] }],
['bold', 'italic', 'underline'],
['blockquote', 'code-block'],
[{ 'list': 'ordered'}, { 'list': 'bullet' }],
[{ 'align': [] }],
['omega']
];
var quill = new Quill('#editor', {
modules: {
toolbar: toolbarOptions
},
theme: 'snow'
});
var customButton = document.querySelector('.ql-omega');
customButton.addEventListener('click', function() {
if (screenfull.enabled) {
console.log('requesting fullscreen');
screenfull.request();
} else {
console.log('Screenfull not enabled');
}
});
</script>
2:
Html javascript. (http://quilljs.com/docs/modules/toolbar/) .
:
<div id="toolbar">
<button class="ql-bold"></button>
<button class="ql-italic"></button>
<button id="toggle-fullscreen"></button>
</div>
<div id="editor"></div>
<script type="text/javascript">
var quill = new Quill('#editor', {
modules: {
toolbar: '#toolbar'
}
});
var customButton = document.querySelector('#toggle-fullscreen');
customButton.addEventListener('click', function() {
if (screenfull.enabled) {
console.log('requesting fullscreen');
screenfull.request();
} else {
console.log('Screenfull not enabled');
}
});
</script>