ladybird/Tests/LibWeb/Text/input/selectionchange-event.html

<script src="include.js"></script>
<style>
    #editable {
        border: 1px solid #ccc;
        font-size: 30px;
        width: 400px;
        height: 100px;
    }
</style>
<div id="editable" contenteditable="true">
    Ladybird is an ongoing project to build an independent web browser from scratch.
</div>
<script>
    asyncTest(async done => {
        function elementToString(e) {
            let element_string = `<${e.nodeName} `;
            if (e.id) element_string += `id="${e.id}" `;
            element_string += ">";
            return element_string;
        }

        document.addEventListener("selectionchange", function (e) {
            const selection = window.getSelection();
            println(
                `selectionchange anchorNode=${elementToString(selection.anchorNode)} anchorOffset=${
                    selection.anchorOffset
                } type=${selection.type} focusNode=${elementToString(
                    selection.focusNode
                )} focusOffset=${selection.focusOffset} isCollapsed=${selection.isCollapsed}`
            );
        });

        const editable = document.getElementById("editable");

        println("Events:");

        internals.click(20, 10);
        await new Promise(resolve => setTimeout(resolve, 0));
        internals.click(30, 10);
        await new Promise(resolve => setTimeout(resolve, 0));
        internals.click(40, 10);
        await new Promise(resolve => setTimeout(resolve, 0));

        done();
    });
</script>