逐行读取行完成后执行Node.js

Question

This likely would happen to other async functions, but I'm using readline as an example, as that's the issue I encountered.

I've just started using JS and is currently trying to collect input from a file via stdin( < ). An example would be the code below:

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false
});

rl.on('line', foo);

function foo(line) {
    // Code to be iterated by line
}

function summary() {
    // Code to be executed after rl finishes
}

So the question is, where do I put summary function? Does rl.on take another callback that is executed after it finishes?

Clarification: foo is called each time when rl reads a line and summary is called only once, which is after rl finishes

Answer 1

您可能正在寻找关闭事件 ：

rl.on('close', summary);