Author: John Au-Yeung

To fix AWS missing credentials when trying send something to S3 Bucket in Node.js, we call the config.update method.

For instance, we write

AWS.config.update({
  accessKeyId: "YOURKEY",
  secretAccessKey: "YOURSECRET",
  region: "sa-east-1",
});

const s3 = new AWS.S3();
const params = {
  Bucket: "makersquest",
  Key: "mykey.txt",
  Body: "HelloWorld",
};
s3.putObject(params, (err, res) => {
  if (err) {
    console.log("Error uploading data: ", err);
  } else {
    console.log("Successfully uploaded data to myBucket/myKey");
  }
});

to call update to update access key and secret key to connect to AWS.

To loop through JSON with Node.js, we use the forEach method.

For instance, we write

const objectKeysArray = Object.keys(yourJsonObj);

objectKeysArray.forEach((objKey) => {
  const objValue = yourJsonObj[objKey];
});

to call Object.keys to get the object’s keys in an array.

Then we call forEach with a callback to get the property value with yourJsonObj[objKey].

To fix "nodemon" not recognized with Node, we’ve to install the nodemon package.

To do this, we run

npm install -g nodemon

to install nodemon globally with npm install -g.

To fix ‘node’ is not recognized as an internal or external command error, we add the Node executable folder to the PATH environment variable.

For instance, we run

SET PATH=C:\Program Files\Nodejs;%PATH%

to add the Node executable folder to the PATH with SET on Windows.

To require from URL in Node.js, we use the require-from-url package.

To install it, we run

npm install require-from-url

Then we use it by writing

const requireFromUrl = require("require-from-url/sync");
const module = requireFromUrl("http://example.com/nodejsmodules/myModule.js");

to call requireFromUrl with the URL of the module to return the module.