ECMAScript proposal: Error cause (chaining errors)

In this blog post, we examine the ECMAScript proposal “Error cause” (by Chengzhong Wu and Hemanth HM). It describes a feature where instances of Error can optionally specify that they were caused by another error. Why would we want to chain errors? # Sometimes, we catch errors that are thrown during a more deeply nested function call and would like to attach more information to it: function readF

[jay-es]

Error の引数に cause を渡せるようになる。ネストした関数の例外処理で原因の特定がしやすくなる