convert file into base64 in javascript
function getBase64(file) { return new Promise((resolve, reject) => { const reader = new FileReader(); reader.readAsDataURL(file); reader.onload = () => resolve(reader.result); reader.onerror = error => reject(error); }); } var file = document.querySelector('#files > input[type="file"]').files[0]; getBase64(file).then( data => console.log(data) );