Uncaught TypeError: Cannot read properties of null (reading 'addEventListener')


let fetchBtn = document.getElementById(‘fetchBtn’);

fetchBtn.addEventListener('click', buttonClickHandler);

function buttonClickHandler() {
    console.log('you have clicked to fetchBtn');
    const xhr = new XMLHttpRequest();'GET', 'harry.txt', true);

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Site Moderator
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February 12, 2022

Hello there,

Can you please verify that the .txt file document is present? Usually, if the file is missing you will run into this error message.