按顺序执行2个异步函数，输出独立

function asyncFunc1(callback) {
    setTimeout(function() {
        // 异步操作1
        callback('结果1');
    }, 1000);
}

function asyncFunc2(callback) {
    setTimeout(function() {
        // 异步操作2
        callback('结果2');
    }, 2000);
}

asyncFunc1(function(result1) {
    console.log(result1);
    asyncFunc2(function(result2) {
        console.log(result2);
    });
});

function asyncFunc1() {
    return new Promise(function(resolve) {
        setTimeout(function() {
            // 异步操作1
            resolve('结果1');
        }, 1000);
    });
}

function asyncFunc2() {
    return new Promise(function(resolve) {
        setTimeout(function() {
            // 异步操作2
            resolve('结果2');
        }, 2000);
    });
}

asyncFunc1().then(function(result1) {
    console.log(result1);
    return asyncFunc2();
}).then(function(result2) {
    console.log(result2);
});

async function asyncFunc1() {
    return new Promise(function(resolve) {
        setTimeout(function() {
            // 异步操作1
            resolve('结果1');
        }, 1000);
    });
}

async function asyncFunc2() {
    return new Promise(function(resolve) {
        setTimeout(function() {
            // 异步操作2
            resolve('结果2');
        }, 2000);
    });
}

async function executeAsyncFunctions() {
    const result1 = await asyncFunc1();
    console.log(result1);
    const result2 = await asyncFunc2();
    console.log(result2);
}

executeAsyncFunctions();