Passing data between Promise callbacks

In Promise-based code, there are usually many callbacks, each one having a separate scope for variables. What if you want to share data between those callbacks? This blog post describes techniques for doing so. The problem # The following code illustrates a common problem with Promise callbacks: The variable connection (line A) exists in one scope, but needs to be accessed in other scopes (line B

[oki448jp]

Promiseでの値の受け渡しについて

[efcl]

Promiseチェイン間における値のやり取りのパターンについて