Node.js console.log - Is it possible to update a line rather than create a new line?

Question

My node.js application has a lot of console logs, which are important for me to see (it\'s quite a big app so runs for a long time and I need to know that thing

Answer 1

To write a partial line.

process.stdout.write("text");
process.stdout.write("more");
process.stdout.write("\n"); // end the line

If the volume of output is the real issue then you'll probably to rethink your logging. You could use a logging system that allows selective runtime logging to narrow your output to what you need.

// The sections we want to log and the minimum level
var LOG_LEVEL = 4;
var LOG_SECTIONS = ["section1","section2","section3"];

function logit(msg, section, level) {
  if (LOG_SECTIONS.indexOf(section) > -1 && LOG_LEVEL >= level) {
    console.log(section + ":" + msg);
  }
}

logit("message 1", "section1", 4); // will log
logit("message 2", "section2", 4); // will log
logit("message 3", "section3", 2); // wont log, below log level
logit("message 4", "section4", 4); // wont log, not in a log section