“ >>>>”或“ <<<<”在JavaScript中的含义或作用

Question

I have found this operator in a book about Node.js. I don't know what it does or mean. In the code below is more context for where I found this

const EventEmitter = require('events');

class Pulser extends EventEmitter {
    start() {
        setInterval(() => {
            console.log(`${new Date().toISOString()} >>>> pulse`);
            this.emit('pulse');
            console.log(`${new Date().toISOString()} <<<< pulse`);
        }, 1000);
    }
}
module.exports = Pulser;

Answer 1

There's no operator there, that's just part of the string. The only interpolated variable is new Date().toISOString() . – CertainPerformance