             <div>
                                <span class="code-var">const</span> vector = <span class="code-var">new</span> <span class="code-tag">Vec3</span>().<span class="code-tag">onChange</span>(() => {
                            </div>

                            <div class="code-indent">
                                <div class="code-comment">
                                    // one of the vector component just changed, do something...
                                </div>
             