无法使用简单的计数器函数

let counter = 0;

function incrementCounter() {
    counter++;
    console.log(counter);
}

// 调用函数来增加计数器
incrementCounter();

function getCounter() {
    return parseInt(localStorage.getItem('counter')) || 0;
}

function incrementCounter() {
    let counter = getCounter();
    counter++;
    localStorage.setItem('counter', counter);
    console.log(counter);
}

// 初始化计数器
incrementCounter();

const redis = require('redis');
const client = redis.createClient();

client.on('error', (err) => {
    console.error('Redis error:', err);
});

function getCounter() {
    return new Promise((resolve, reject) => {
        client.get('counter', (err, data) => {
            if (err) return reject(err);
            resolve(parseInt(data) || 0);
        });
    });
}

async function incrementCounter() {
    let counter = await getCounter();
    counter++;
    client.set('counter', counter);
    console.log(counter);
}

// 初始化计数器
incrementCounter();