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

Ben McMahan
Ben McMahan
7,921 Points
Posted by Ben McMahan
Ben McMahan
7,921 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 :)

Laura Dangler
Laura Dangler
3,301 Points

Thank You i was wondering about that nice solution!

1 Answer