Not really a fair comparison. Map is creating a new array of promises then asynchronously executing them. To do this with a for loop you would do something like this:
This approach looks good. Pushing the promises into an array within for loop will achieve concurrency.
But when we have a need for more than one await inside the block, it will not work.
In the above code, response.json() won't work because response is a promise, it won't have json() method.
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Not really a fair comparison. Map is creating a new array of promises then asynchronously executing them. To do this with a for loop you would do something like this:
const todoIdList = [1, 2, 3, 4]
const promiseList = []
for (const id of todoIdList) {
const response = fetch(
https://jsonplaceholder.typicode.com/todos/${id})promiseList.push(response.json())
}
const responses = Promise.all(promiseList)
This approach looks good. Pushing the promises into an array within for loop will achieve concurrency.
But when we have a need for more than one await inside the block, it will not work.
In the above code, response.json() won't work because response is a promise, it won't have json() method.