ladybird/Tests/LibWeb/Text/input/Editing/execCommand-subscript.html

<script src="../include.js"></script>
<div contenteditable="true">foobar</div>
<script>
    test(() => {
        const range = document.createRange();
        getSelection().addRange(range);

        const divElm = document.querySelector('div');
        const printableSelection = () => {
            let activeRange = getSelection().getRangeAt(0);
            return `${activeRange.startContainer.nodeName} ${activeRange.startOffset} ${activeRange.endContainer.nodeName} ${activeRange.endOffset}`;
        };
        const report = () => println(`Div contents: "${divElm.innerHTML}" state: ${document.queryCommandState('subscript')} selection: ${printableSelection()}`);
        report();

        // Add subscript to 'bar'
        range.setStart(divElm.childNodes[0], 3);
        range.setEnd(divElm.childNodes[0], 6);
        document.execCommand('subscript');
        report();

        // Add subscript to 'foo'
        range.setStart(divElm.childNodes[0], 0);
        range.setEnd(divElm.childNodes[0], 3);
        document.execCommand('subscript');
        report();

        // Desubscriptify 'bar'
        range.setStart(divElm.childNodes[0].childNodes[1], 0);
        range.setEnd(divElm.childNodes[0].childNodes[1], 3);
        document.execCommand('subscript');
        report();
    });
</script>