Promise.all(): the order of results follows the input

Useful to know

Promise.all() fulfils when all input promises fulfil and returns their results in input order. If one rejects, the combined promise rejects with that reason. [1]

If the second request finishes first, its result still occupies the second position. This is useful when loading related data together. Rejection of the combined promise does not automatically cancel the remaining work. Cancellation or a separate report for every outcome must be provided by other parts of the solution.