andreypopp/autobind-decorator

boundMethod decorator might not be usable in Angular production builds

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#82 opened on Dec 13, 2018

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Description

I get this error when running production builds of my Angular app, which contains usages of the boundMethod decorator:

 Error encountered resolving symbol values statically. Only initialized variables and constants can be referenced because the value of this variable is needed by the template compiler (position 3:22 in the original .ts file), resolving symbol boundMethod in C:/Users/Jeff/[path to my app]/node_modules/autobind-decorator/index.d.ts

I believe it is the Angular AoT compiler which is throwing this error. Devleopment builds, which don't use AoT, don't produce these errors.

I import the decorator using import { boundMethod } from "autobind-decorator";

A workaround is to use the autobind decorator instead, though that is discouraged by this package's docs.

Contributor guide

Research direction
Investigate why Angular AoT cannot resolve 'boundMethod' symbol statically. Check the decorator's metadata and export structure in 'index.d.ts'. Look for workarounds in Angular's AoT documentation or similar issues.
Tech stack
javascripttypescript
Domain
frontend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
AngularTypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50