今の今まで間違った認識でいた、やばぁ．asyncとawaitとPromise

async function example1(a){
    if(Number.isInteger(a)){
        return a;
    }
    throw new Error('wow');
}

example1(123).then(d=>console.log(d)).catch(e=>console.log(e));
example1('abc').then(d=>console.log(d)).catch(e=>console.log(e));

async function example2(a){
    if(Number.isInteger(a)){
        return a;
    }
    throw new Error('wow');
}
async function example3() {
    let result = await example2(123).then(d=>d);
    document.body.textContent = result;
}
example3();

async function example4() {
    let result = await example2('123').then(d=>d).catch(e=>e);
    document.body.textContent = result;
}
//example4();