JohnSnow questions

• return value of a callback function in Node.js
• Eslint reporting in VSCode but not on the terminal
• Get the size of a file, with uploading and POST request
• hover mode on Chart.js
• View the source code of a website built with React
• Vanilla Node vs Express
• mongoose query same field with different values
• Eslint expected indentation of 1 tab but found 4 spaces error
• Updating an object with setState in React

JohnSnow answers