emberjs/ember.js · error

ember-metal.libraries-register

ember-metal.libraries-register

Error message

Library "${name}" is already registered with Ember.

What it means

Error "Library "${name}" is already registered with Ember." thrown in emberjs/ember.js.

Source

Thrown at packages/@ember/-internals/metal/lib/libraries.ts:52

    for (let lib of libs) {
      if (lib.name === name) {
        return lib;
      }
    }
    return undefined;
  }

  register(name: string, version: string, isCoreLibrary?: boolean): void {
    let index = this._registry.length;

    if (!this._getLibraryByName(name)) {
      if (isCoreLibrary) {
        index = this._coreLibIndex++;
      }
      this._registry.splice(index, 0, { name, version });
    } else {
      warn(`Library "${name}" is already registered with Ember.`, false, {
        id: 'ember-metal.libraries-register',
      });
    }
  }

  registerCoreLibrary(name: string, version: string): void {
    this.register(name, version, true);
  }

  deRegister(name: string): void {
    let lib = this._getLibraryByName(name);
    let index;

    if (lib) {
      index = this._registry.indexOf(lib);
      this._registry.splice(index, 1);
    }
  }

View on GitHub (pinned to 26f97246a8)

When it happens

Trigger: Thrown at packages/@ember/-internals/metal/lib/libraries.ts:52 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of emberjs/ember.js@26f97246a8 (2026-09-01). Data as JSON: /api/errors/a5a700de5a118ad1. Report an issue: GitHub.