How to Read Files in Node.js

<> About how to read files in the Node.js programming language. Reading and writing files in programming is basic, so it’s definitely something you want to learn. </>

Place a function like main() inside the callback as follows and write code to process the file text within main().

var fs = require('fs');
var path = require('path');

var content;

console.log(__line);

fs.readFile('tmp.txt', 'utf8', function(err, content) {
    console.log(content);
});

console.log(__line);

fs.readFile('tmp.txt', 'utf8', function(err, data) {
        content = data;
    main() ;
});

console.log(__line);

function main(){
    console.log(content);
}

console.log(__line);

Output

18
24
31
37
something ++inserted++ here.

something ++inserted++ here.

javascript - Get data from fs.readFile - Stack Overflow