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/* eslint-env browser */
const submitBtn = document.getElementById('submit');
const fileInput = document.getElementById('file');
const fileOutput = document.getElementById('fileoutput');
fileInput.addEventListener('change', () => {
const reader = new FileReader();
reader.onload = function () {
const text = reader.result;
fileOutput.value = text;
submitBtn.disabled = false;
};
reader.readAsText(fileInput.files[0]);
})
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