Here is my code:

async function rScript() {
    var dbHost1 = '';
    var dbHost2;
    var DDD = await lineReader.eachLine(file, function(line) {
        if (line.includes('DB_HOST')) {
            dbHost2 = line.substr(18, 11);
            console.log('dbHost2', dbHost2);
            dbHost1 = dbHost2;
        }
    });
    console.log('DDD', DDD)
    console.log('dbHost1', dbHost1);
}

result:

DDD { getReader: [Function: getReader] }
dbHost1
dbHost2 'localhost'

Here i set dbHost1 value as dbHost2 data but its not getting the data from dbHost2 ? whats the problem in my code?