Function

warn (message, test, options) public

Module:	@ember/debug

Defined in packages/@ember/debug/lib/warn.ts:70

Available since v1.0.0

import { warn } from '@ember/debug';

message

String

A warning to display.

test

Boolean

An optional boolean. If falsy, the warning will be displayed.

options

Object

An object that can be used to pass a unique `id` for this warning. The `id` can be used by Ember debugging tools to change the behavior (raise, log, or silence) for that specific warning. The `id` should be namespaced by dots, e.g. "ember-debug.feature-flag-with-features-stripped"

Display a warning with the provided message.

• In a production build, this method is defined as an empty function (NOP). Uses of this method in Ember itself are stripped from the ember.prod.js build.

import { warn } from '@ember/debug';
import tomsterCount from './tomster-counter'; // a module in my project

// Log a warning if we have more than 3 tomsters
warn('Too many tomsters!', tomsterCount <= 3, {
  id: 'ember-debug.too-many-tomsters'
});