How to read a file from an Azure Function in NodeJS?

I have an Azure function and a file called configAPI.json which are located in the same folder as shown in the image below.

enter image description here

I want to read the latter with the following code based on this post How can i read a Json file with a Azure function-Node.js but the code isn’t working at all because when I try to see if there’s any content in the configAPI variable I encounter undefined:

module.exports = async function (context, req) {
    const fs = require('fs');
    const path = context.executionContext.functionDirectory + '//configAPI.json';
    configAPI= fs.readFile(path, 'utf-8', function(err, data){
        if (err) {
        var result = JSON.parse(data);
        return result

   for (let file_index=0; file_index<configAPI.length; file_index++){
       // do something


What am I missing in the code to make sure I can read the file and use it in a variable in my loop?


functionDirectory – give you path to your functionS app then you have your single function

I think you should do:

const path = context.executionContext.functionDirectory + '\configAPI.json';

In case you want to parse your json file you should have:

const file = JSON.parse(fs.readFileSync(context.executionContext.functionDirectory + '\configAPI.json'));

PS. context has also variable functionName so other option to experiment would be:

    const path = context.executionContext.functionDirectory + 
+ '\' +context.executionContext.functionName + '\configAPI.json';