trigger an event when contenteditable is changed

Answer 1

You can simply use focus/blur event with data() function of jQuery :

// Find all editable content.
$('[contenteditable=true]')
    // When you click on item, record into data("initialText") content of this item.
    .focus(function() {
        $(this).data("initialText", $(this).html());
    });
    // When you leave an item...
    .blur(function() {
        // ...if content is different...
        if ($(this).data("initialText") !== $(this).html()) {
            // ... do something.
            console.log('New data when content change.');
            console.log($(this).html());
        }
    });
});

UPDATE: With Vanilla JS

// Find all editable content.
var contents = document.querySelectorAll("[contenteditable=true]");
[].forEach.call(contents, function (content) {
    // When you click on item, record into `data-initial-text` content of this item.
    content.addEventListener("focus", function () {
        content.setAttribute("data-initial-text", content.innerHTML);
    });
    // When you leave an item...
    content.addEventListener("blur", function () {
        // ...if content is different...
        if (content.getAttribute("data-initial-text") !== content.innerHTML) {
            // ... do something.
            console.log("New data when content change.");
            console.log(content.innerHTML);
        }
    });
});