javascript function what reads a file and extract the text version number and put it into a DOM html element like <span id="version"></span> async function set_version(file,_id) { var raw_file = new XMLHttpRequest(); raw_file.open("GET", file, false); raw_file.onreadystatechange = async function () { if(raw_file.readyState === 4) { if(raw_file.status === 200 || raw_file.status == 0) { let version = await raw_file.responseText; let e = document.querySelector("#version"); e.innerHTML = 'v.' +version; } } }; raw_file.send(null); } call it from a async function: async function foo() { await set_version("version.txt",'version'); }

https://stackoverflow.com/questions/14446447/how-to-read-a-local-text-file

async function set_version(file,_id) { let version = await aget_api('version.txt'); let e = document.querySelector("#version"); e.innerHTML = 'v.' +version; } async function aget_api(url) { return new Promise((resolve, reject) => { let xhr = new XMLHttpRequest(); xhr.open("GET", url,true); xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); xhr.onload = function() { return resolve(xhr.responseText); }; xhr.onerror = function() { return reject(xhr.statusText); }; xhr.send(null); }); } 13.03.20

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