Nested Handling

Handle one error locally and pass another outward.

nested_handling.js

const mode = "inner";
let status = "";

try {
  try {
    if (mode === "inner") {
      throw new Error("inner");
    }
    if (mode === "outer") {
      throw new Error("outer");
    }
    status = "ok";
  } catch (error) {
    if (error.message === "outer") {
      throw error;
    }
    status = "inner handled";
  }
} catch (error) {
  status = "outer handled";
}

console.log("mode=" + mode);
console.log("status=" + status);

nested-handling Nested `try` blocks can handle some failures close to where they happen and allow other failures to move outward.