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HTML

              
                <pre id="logger"></pre>
              
            
!

CSS

              
                
              
            
!

JS

              
                const fruits = ['apple', 'banana', 'lemon'];

async function doNetworkCall(fruit) {
	return new Promise(resolve => {
		const ms = Math.floor(Math.random() * 2000);
		setTimeout(() => resolve(ms), ms);
	});
}

function log(text = '') {
  document.querySelector('#logger').innerHTML += `${text}\n`;
}

function doSomethingElseSynchronously(fruit, result) {
	log(`Resolved ${fruit} after ${result}ms`);
}

// This is a example of a confuse function
async function failAsyncFor(fruits) {
	// Where should I put the await? ¯\_(ツ)_/¯
	await fruits.forEach(async (fruit) => {
		const result = await doNetworkCall(fruit);
		doSomethingElseSynchronously(fruit, result);
	} );
}

async function doSerialProcess(fruits) {
	for (const fruit of fruits) {
		const result = await doNetworkCall(fruit);
		doSomethingElseSynchronously(fruit, result);
	}
}

async function doAsyncProcess(fruits) {
    await Promise.all(fruits.map(async (fruit) => {
        const result = await doNetworkCall(fruit);
        doSomethingElseSynchronously(fruit, result);
    }));
}

async function processFruits(fruits) {
	log(`Fruits array: ${JSON.stringify(fruits)}`);
	log();
	
	log('== SERIAL REQUESTS ==');
	await doSerialProcess(fruits);
	log('-- finished all --');
	
	log();
	
	log('== PARALLEL REQUESTS ==');
	await doAsyncProcess(fruits);
	log('-- finished all --');
  log();
	
	// After other to avoid interfering in other methods
	// As experimentation, you can move this block to the line before "SERIAL REQUESTS" block
	// You will notice some pretty weird behavior
	log('== FAIL ASYNC FOR EACH ==');
	await failAsyncFor(fruits);
	log('-- finished all --');
}

processFruits(fruits);
              
            
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999px

Console