How can the [object HTMLButtonElement] in the UI be shown using javascript?

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You can display the [object HTMLButtonElement] in the UI using JavaScript by creating a new button element and appending it to an existing element on the page. Here's an example:

1. First, create a new button element using the document.createElement() method:

let button = document.createElement('button');

1. Then, set the text content of the button:

button.textContent = 'Click me!';

1. Finally, append the button to an existing element on the page (e.g. the body):

document.body.appendChild(button);

This will display the button with the text "Click me!" on the page.