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JavaScript JavaScript and the DOM Making Changes to the DOM Remove Nodes

Ben McMahan
Ben McMahan
7,314 Points

JavaScript exception when removing nodes

Just a suggestion -

In this step, once all of the nodes are removed, repeated clicking of Remove Last Task throws this exception:

Uncaught TypeError: Cannot read properties of null (reading 'remove') at HTMLButtonElement.<anonymous> (app.js:21:14)

Simply adding a conditional prevents this:

btnRemove.addEventListener('click', () => {
    const lastItem = document.querySelector('li:last-child'); // Get the last item in the UL
    if (lastItem) {
        lastItem.remove();
    }
});

Cheers :)

Thank You i was wondering about that nice solution!