JavaScript and HTML

#1 part 1

Use the writeln method of the document object to display the user agent in a

tag in the webpage. Hint: The userAgent property of the window.navigator object contains the user agent.

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Demo

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#1 part 2

Assign textNode with the first h2 element, and assign listNodes with all elements with a class name of 'language-item'.

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#1 part 3

Register the textChanged event handler to handle input changes for the textarea tag. Note: The function counts the number of characters in the textarea.

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