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// opens file dialog waits till user selects file and return dataurl of uploaded file | |
async function pick() { | |
var filepicker = document.createElement("input"); | |
filepicker.setAttribute("type","file"); | |
filepicker.click(); | |
return new Promise((resolve,reject) => { | |
filepicker.addEventListener("change", e => { | |
var reader = new FileReader(); | |
reader.addEventListener('load', file => resolve(file.target.result)); |