useHotkeySequences

Defined in: packages/ember-hotkeys/src/useHotkeySequences.ts:13

Registers a reactive list of sequences with the helper's template lifecycle.

Extends#

• default<{ Args: { Named: SequenceOptions; Positional: [HotkeySequenceDefinition[]]; }; Return: void; }>

Constructors#

Constructor#

new useHotkeySequences(owner?): UseHotkeySequences;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/index.d.ts:28

Parameters#

owner?#

Owner

Returns#

UseHotkeySequences

Inherited from#

Helper<{
  Args: {
    Positional: [Array<HotkeySequenceDefinition>]
    Named: SequenceOptions
  }
  Return: void
}>.constructor

Properties#

[Invoke]#

[Invoke]: (...args) => void;

Defined in: node_modules/.pnpm/@glint+template@1.9.0/node_modules/@glint/template/-private/integration.d.ts:22

Parameters#

args#

...[HotkeySequenceDefinition[], NamedArgs<SequenceOptions>]

Returns#

void

Inherited from#

Helper.[Invoke]

[OWNER]?#

optional [OWNER]?: Owner;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:77

Internal

Inherited from#

Helper.[OWNER]

[RECOMPUTE_TAG]#

[RECOMPUTE_TAG]: DirtyableTag;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/-internals/glimmer/lib/helper.d.ts:103

Inherited from#

Helper.[RECOMPUTE_TAG]

concatenatedProperties?#

optional concatenatedProperties?: string | string[];

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:637

Inherited from#

Helper.concatenatedProperties

mergedProperties?#

optional mergedProperties?: unknown[];

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:638

Inherited from#

Helper.mergedProperties

_lazyInjections?#

readonly static optional _lazyInjections?: () => void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:636

Returns#

void

Inherited from#

Helper._lazyInjections

_onLookup?#

readonly static optional _onLookup?: (debugContainerKey) => void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:635

Parameters#

debugContainerKey#

string

Returns#

void

Inherited from#

Helper._onLookup

_without#

static _without: any[] | undefined;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:113

Internal

Inherited from#

Helper._without

[INIT_FACTORY]?#

static optional [INIT_FACTORY]?: null;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:114

Inherited from#

Helper.[INIT_FACTORY]

[IS_CLASSIC_HELPER]#

static [IS_CLASSIC_HELPER]: boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/-internals/glimmer/lib/helper.d.ts:100

Inherited from#

Helper.[IS_CLASSIC_HELPER]

helper#

static helper: {
<P, N, R>  (helperFn): FunctionBasedHelper<{
  Args: {
     Named: N;
     Positional: P;
  };
  Return: R;
}>;
<S>  (helperFn): FunctionBasedHelper<S>;
};

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/-internals/glimmer/lib/helper.d.ts:102

Call Signature#

<P, N, R>(helperFn): FunctionBasedHelper<{
  Args: {
     Named: N;
     Positional: P;
  };
  Return: R;
}>;

In many cases it is not necessary to use the full Helper class. The helper method create pure-function helpers without instances. For example:

import { helper } from '@ember/component/helper';

export default helper(function([cents], {currency}) {
  return `${currency}${cents * 0.01}`;
});

Type Parameters#

P#

P extends DefaultPositional

N#

N extends object

R#

R = unknown

Parameters#

helperFn#

(positional, named) => R

Returns#

FunctionBasedHelper<{ Args: { Named: N; Positional: P; }; Return: R; }>

Static#

Method#

helper

For#

@ember/component/helper

Since#

1.13.0

Call Signature#

<S>(helperFn): FunctionBasedHelper<S>;

In many cases it is not necessary to use the full Helper class. The helper method create pure-function helpers without instances. For example:

import { helper } from '@ember/component/helper';

export default helper(function([cents], {currency}) {
  return `${currency}${cents * 0.01}`;
});

Type Parameters#

S#

S

Parameters#

helperFn#

(positional, named) => GetOr<S>

Returns#

FunctionBasedHelper<S>

Static#

Method#

helper

For#

@ember/component/helper

Since#

1.13.0

Deprecated#

Inherited from#

Helper.helper

isClass#

readonly static isClass: boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:633

Inherited from#

Helper.isClass

isHelperFactory#

static isHelperFactory: boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/-internals/glimmer/lib/helper.d.ts:99

Inherited from#

Helper.isHelperFactory

isMethod#

readonly static isMethod: boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:634

Inherited from#

Helper.isMethod

mixins#

static mixins: Mixin[] | undefined;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:105

Internal

Inherited from#

Helper.mixins

ownerConstructor#

static ownerConstructor: any;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:111

Internal

Inherited from#

Helper.ownerConstructor

properties#

static properties: 
  | {
[key: string]: any;
}
  | undefined;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:107

Internal

Inherited from#

Helper.properties

PrototypeMixin#

static PrototypeMixin: any;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:629

Inherited from#

Helper.PrototypeMixin

superclass#

static superclass: any;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:630

Inherited from#

Helper.superclass

Accessors#

_debugContainerKey#

Get Signature#

get _debugContainerKey(): false | `${string}:${string}`;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/index.d.ts:30

Returns#

false | `${string}:${string}`

Inherited from#

Helper._debugContainerKey

isDestroyed#

Get Signature#

get isDestroyed(): boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:270

Destroyed object property flag.

if this property is true the observers and bindings were already removed by the effect of calling the destroy() method.

Default#

false
@public

Returns#

boolean

Set Signature#

set isDestroyed(_value): void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:271

Parameters#

_value#

boolean

Returns#

void

Inherited from#

Helper.isDestroyed

isDestroying#

Get Signature#

get isDestroying(): boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:282

Destruction scheduled flag. The destroy() method has been called.

The object stays intact until the end of the run loop at which point the isDestroyed flag is set.

Default#

false
@public

Returns#

boolean

Set Signature#

set isDestroying(_value): void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:283

Parameters#

_value#

boolean

Returns#

void

Inherited from#

Helper.isDestroying

Methods#

_super()#

_super(...args): any;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:73

Internal

Parameters#

args#

...any[]

Returns#

any

Inherited from#

Helper._super

addObserver()#

Call Signature#

addObserver<Target>(
   key, 
   target, 
   method): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:322

Adds an observer on a property.

This is the core method used to register an observer for a property.

Once you call this method, any time the key's value is set, your observer will be notified. Note that the observers are triggered any time the value is set, regardless of whether it has actually changed. Your observer should be prepared to handle that.

There are two common invocation patterns for .addObserver():

• Passing two arguments:
  • the name of the property to observe (as a string)
  • the function to invoke (an actual function)
• Passing three arguments:
  • the name of the property to observe (as a string)
  • the target object (will be used to look up and invoke a function on)
  • the name of the function to invoke on the target object (as a string).

import Component from '@ember/component';

export default Component.extend({
  init() {
    this._super(...arguments);

    // the following are equivalent:

    // using three arguments
    this.addObserver('foo', this, 'fooDidChange');

    // using two arguments
    this.addObserver('foo', (...args) => {
      this.fooDidChange(...args);
    });
  },

  fooDidChange() {
    // your custom logic code
  }
});

Observer Methods#

Observer methods have the following signature:

import Component from '@ember/component';

export default Component.extend({
  init() {
    this._super(...arguments);
    this.addObserver('foo', this, 'fooDidChange');
  },

  fooDidChange(sender, key, value, rev) {
    // your code
  }
});

The sender is the object that changed. The key is the property that changes. The value property is currently reserved and unused. The rev is the last property revision of the object when it changed, which you can use to detect if the key value has really changed or not.

Usually you will not need the value or revision parameters at the end. In this case, it is common to write observer methods that take only a sender and key value as parameters or, if you aren't interested in any of these values, to write an observer that has no parameters at all.

While observers are still supported, there are plans to deprecate them See the in-progress deprecation guide for guidance on how to avoid using observers.

Type Parameters#

Target#

Target

Parameters#

key#

keyof UseHotkeySequences

The key to observe

target#

Target

The target object to invoke

method#

ObserverMethod<Target, UseHotkeySequences>

The method to invoke

Returns#

this

Method#

addObserver

Inherited from#

Helper.addObserver

Call Signature#

addObserver(key, method): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:323

Parameters#

key#

keyof UseHotkeySequences

method#

ObserverMethod<UseHotkeySequences, UseHotkeySequences>

Returns#

this

Inherited from#

Helper.addObserver

cacheFor()#

cacheFor<K>(key): unknown;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:394

Returns the cached value of a computed property, if it exists. This allows you to inspect the value of a computed property without accidentally invoking it if it is intended to be generated lazily.

Type Parameters#

K#

K extends keyof UseHotkeySequences

Parameters#

key#

K

Returns#

unknown

The cached value of the computed property, if any

Method#

cacheFor

Inherited from#

Helper.cacheFor

compute()#

compute(positional, options): void;

Defined in: packages/ember-hotkeys/src/useHotkeySequences.ts:25

Override this function when writing a class-based helper.

Parameters#

positional#

[HotkeySequenceDefinition[]]

The positional arguments to the helper

options#

SequenceOptions

Returns#

void

Method#

compute

Since#

1.13.0

Overrides#

Helper.compute

decrementProperty()#

decrementProperty(keyName, decrement?): number;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:368

Set the value of a property to the current value minus some amount.

player.decrementProperty('lives');
orc.decrementProperty('health', 5);

Parameters#

keyName#

keyof UseHotkeySequences

The name of the property to decrement

decrement?#

number

The amount to decrement by. Defaults to 1

Returns#

number

The new property value

Method#

decrementProperty

Inherited from#

Helper.decrementProperty

destroy()#

destroy(): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:298

Destroys an object by setting the isDestroyed flag and removing its metadata, which effectively destroys observers and bindings.

If you try to set a property on a destroyed object, an exception will be raised.

Note that destruction is scheduled for the end of the run loop and does not happen immediately. It will set an isDestroying flag immediately.

Returns#

this

receiver

Method#

destroy

Inherited from#

Helper.destroy

get()#

Call Signature#

get<K>(key): UseHotkeySequences[K];

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:119

Retrieves the value of a property from the object.

This method is usually similar to using object[keyName] or object.keyName, however it supports both computed properties and the unknownProperty handler.

Because get unifies the syntax for accessing all these kinds of properties, it can make many refactorings easier, such as replacing a simple property with a computed property, or vice versa.

Computed Properties#

Computed properties are methods defined with the property modifier declared at the end, such as:

import { computed } from '@ember/object';

fullName: computed('firstName', 'lastName', function() {
  return this.get('firstName') + ' ' + this.get('lastName');
})

When you call get on a computed property, the function will be called and the return value will be returned instead of the function itself.

Unknown Properties#

Likewise, if you try to call get on a property whose value is undefined, the unknownProperty() method will be called on the object. If this method returns any value other than undefined, it will be returned instead. This allows you to implement "virtual" properties that are not defined upfront.

Type Parameters#

K#

K extends keyof UseHotkeySequences

Parameters#

key#

K

Returns#

UseHotkeySequences[K]

The property value or undefined.

Method#

get

Inherited from#

Helper.get

Call Signature#

get(key): unknown;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:120

Parameters#

key#

string

Returns#

unknown

Inherited from#

Helper.get

getProperties()#

Call Signature#

getProperties<L>(list): { [Key in keyof useHotkeySequences]: useHotkeySequences[Key] };

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:142

To get the values of multiple properties at once, call getProperties with a list of strings or an array:

record.getProperties('firstName', 'lastName', 'zipCode');
// { firstName: 'John', lastName: 'Doe', zipCode: '10011' }

is equivalent to:

record.getProperties(['firstName', 'lastName', 'zipCode']);
// { firstName: 'John', lastName: 'Doe', zipCode: '10011' }

Type Parameters#

L#

L extends keyof UseHotkeySequences[]

Parameters#

list#

L

of keys to get

Returns#

{ [Key in keyof useHotkeySequences]: useHotkeySequences[Key] }

Method#

getProperties

Inherited from#

Helper.getProperties

Call Signature#

getProperties<L>(...list): { [Key in keyof useHotkeySequences]: useHotkeySequences[Key] };

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:145

Type Parameters#

L#

L extends keyof UseHotkeySequences[]

Parameters#

list#

...L

Returns#

{ [Key in keyof useHotkeySequences]: useHotkeySequences[Key] }

Inherited from#

Helper.getProperties

Call Signature#

getProperties<L>(list): { [Key in string]: unknown };

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:148

Type Parameters#

L#

L extends string[]

Parameters#

list#

L

Returns#

{ [Key in string]: unknown }

Inherited from#

Helper.getProperties

Call Signature#

getProperties<L>(...list): { [Key in string]: unknown };

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:151

Type Parameters#

L#

L extends string[]

Parameters#

list#

...L

Returns#

{ [Key in string]: unknown }

Inherited from#

Helper.getProperties

incrementProperty()#

incrementProperty(keyName, increment?): number;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:353

Set the value of a property to the current value plus some amount.

person.incrementProperty('age');
team.incrementProperty('score', 2);

Parameters#

keyName#

keyof UseHotkeySequences

The name of the property to increment

increment?#

number

The amount to increment by. Defaults to 1

Returns#

number

The new property value

Method#

incrementProperty

Inherited from#

Helper.incrementProperty

init()#

init(properties): void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/-internals/glimmer/lib/helper.d.ts:105

An overridable method called when objects are instantiated. By default, does nothing unless it is overridden during class definition.

Example:

import EmberObject from '@ember/object';

const Person = EmberObject.extend({
  init() {
    alert(`Name is ${this.get('name')}`);
  }
});

let steve = Person.create({
  name: 'Steve'
});

// alerts 'Name is Steve'.

NOTE: If you do override init for a framework class like Component from @ember/component, be sure to call this._super(...arguments) in your init declaration! If you don't, Ember may not have an opportunity to do important setup work, and you'll see strange behavior in your application.

Parameters#

properties#

object | undefined

Returns#

void

Method#

init

Inherited from#

Helper.init

notifyPropertyChange()#

notifyPropertyChange(keyName): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:234

Convenience method to call propertyWillChange and propertyDidChange in succession.

Notify the observer system that a property has just changed.

Sometimes you need to change a value directly or indirectly without actually calling get() or set() on it. In this case, you can use this method instead. Calling this method will notify all observers that the property has potentially changed value.

Parameters#

keyName#

string

The property key to be notified about.

Returns#

this

Method#

notifyPropertyChange

Inherited from#

Helper.notifyPropertyChange

recompute()#

recompute(): void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/-internals/glimmer/lib/helper.d.ts:142

On a class-based helper, it may be useful to force a recomputation of that helpers value. This is akin to rerender on a component.

In most cases, recompute is not needed because accessing tracked properties in compute will automatically re-run the helper when those properties change. Use recompute only when you need to trigger a recomputation imperatively, for example in response to an external event:

import Helper from '@ember/component/helper';

export default class CurrentTimeHelper extends Helper {
  interval = null;

  compute() {
    return new Date().toLocaleTimeString();
  }

  constructor() {
    super(...arguments);
    this.interval = setInterval(() => this.recompute(), 1000);
  }

  willDestroy() {
    super.willDestroy();
    clearInterval(this.interval);
  }
}

Returns#

void

Method#

recompute

Since#

1.13.0

Inherited from#

Helper.recompute

removeObserver()#

Call Signature#

removeObserver<Target>(
   key, 
   target, 
   method): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:337

Remove an observer you have previously registered on this object. Pass the same key, target, and method you passed to addObserver() and your target will no longer receive notifications.

Type Parameters#

Target#

Target

Parameters#

key#

keyof UseHotkeySequences

The key to observe

target#

Target

The target object to invoke

method#

ObserverMethod<Target, UseHotkeySequences>

The method to invoke

Returns#

this

Method#

removeObserver

Inherited from#

Helper.removeObserver

Call Signature#

removeObserver(key, method): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:338

Parameters#

key#

keyof UseHotkeySequences

method#

ObserverMethod<UseHotkeySequences, UseHotkeySequences>

Returns#

this

Inherited from#

Helper.removeObserver

reopen()#

reopen(...args): this;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:79

Parameters#

args#

...(Record<string, unknown> | Mixin)[]

Returns#

this

Inherited from#

Helper.reopen

set()#

Call Signature#

set<K, T>(key, value): T;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:198

Sets the provided key or path to the value.

record.set("key", value);

This method is generally very similar to calling object["key"] = value or object.key = value, except that it provides support for computed properties, the setUnknownProperty() method and property observers.

Computed Properties#

If you try to set a value on a key that has a computed property handler defined (see the get() method for an example), then set() will call that method, passing both the value and key instead of simply changing the value itself. This is useful for those times when you need to implement a property that is composed of one or more member properties.

Unknown Properties#

If you try to set a value on a key that is undefined in the target object, then the setUnknownProperty() handler will be called instead. This gives you an opportunity to implement complex "virtual" properties that are not predefined on the object. If setUnknownProperty() returns undefined, then set() will simply set the value on the object.

Property Observers#

In addition to changing the property, set() will also register a property change with the object. Unless you have placed this call inside of a beginPropertyChanges() and endPropertyChanges(), any "local" observers (i.e. observer methods declared on the same object), will be called immediately. Any "remote" observers (i.e. observer methods declared on another object) will be placed in a queue and called at a later time in a coalesced manner.

Type Parameters#

K#

K extends keyof UseHotkeySequences

T#

T extends | string | boolean | unknown[] | string[] | ((...args) => void) | ((positional, options) => void) | Owner | DirtyableTag | ((properties) => void) | (() => void) | ((...args) => this) | (() => this) | ({ <K> (key): UseHotkeySequences[K]; (key): unknown; }) | ({ <L> (list): { [Key in keyof useHotkeySequences]: useHotkeySequences[Key] }; <L> (...list): { [Key in keyof useHotkeySequences]: useHotkeySequences[Key] }; <L> (list): { [Key in string]: unknown }; <L> (...list): { [Key in string]: unknown }; }) | ({ <K, T> (key, value): T; <T> (key, value): T; }) | ({ <K, P> (hash): P; <T> (hash): T; }) | ((keyName) => this) | ({ <Target> (key, target, method): this; (key, method): this; }) | ({ <Target> (key, target, method): this; (key, method): this; }) | ((keyName, increment?) => number) | ((keyName, decrement?) => number) | ((keyName) => boolean) | (<K>(key) => unknown) | ((...args) => any) | (() => void) | (() => string) | undefined

Parameters#

key#

K

value#

T

The value to set or null.

Returns#

T

The passed value

Method#

set

Inherited from#

Helper.set

Call Signature#

set<T>(key, value): T;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:199

Type Parameters#

T#

T

Parameters#

key#

string

value#

T

Returns#

T

Inherited from#

Helper.set

setProperties()#

Call Signature#

setProperties<K, P>(hash): P;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:214

Sets a list of properties at once. These properties are set inside a single beginPropertyChanges and endPropertyChanges batch, so observers will be buffered.

record.setProperties({ firstName: 'Charles', lastName: 'Jolley' });

Type Parameters#

K#

K extends keyof UseHotkeySequences

P#

P extends { [Key in keyof useHotkeySequences]: useHotkeySequences[Key] }

Parameters#

hash#

P

the hash of keys and values to set

Returns#

P

The passed in hash

Method#

setProperties

Inherited from#

Helper.setProperties

Call Signature#

setProperties<T>(hash): T;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:217

Type Parameters#

T#

T extends Record<string, unknown>

Parameters#

hash#

T

Returns#

T

Inherited from#

Helper.setProperties

toggleProperty()#

toggleProperty(keyName): boolean;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/observable.d.ts:382

Set the value of a boolean property to the opposite of its current value.

starship.toggleProperty('warpDriveEngaged');

Parameters#

keyName#

keyof UseHotkeySequences

The name of the property to toggle

Returns#

boolean

The new property value

Method#

toggleProperty

Inherited from#

Helper.toggleProperty

toString()#

toString(): string;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:345

Returns a string representation which attempts to provide more information than Javascript's toString typically does, in a generic way for all Ember objects.

import EmberObject from '@ember/object';

const Person = EmberObject.extend();
person = Person.create();
person.toString(); //=> "<Person:ember1024>"

If the object's class is not defined on an Ember namespace, it will indicate it is a subclass of the registered superclass:

const Student = Person.extend();
let student = Student.create();
student.toString(); //=> "<(subclass of Person):ember1025>"

If the method toStringExtension is defined, its return value will be included in the output.

const Teacher = Person.extend({
  toStringExtension() {
    return this.get('fullName');
  }
});
teacher = Teacher.create();
teacher.toString(); //=> "<Teacher:ember1026:Tom Dale>"

Returns#

string

string representation

Method#

toString

Inherited from#

Helper.toString

willDestroy()#

willDestroy(): void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:305

Override to implement teardown.

Returns#

void

Method#

willDestroy

Inherited from#

Helper.willDestroy

applyPartial()#

static applyPartial(obj): Record<string, any>;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:145

Internal

Parameters#

obj#

object

Returns#

Record<string, any>

Inherited from#

Helper.applyPartial

create()#

Call Signature#

readonly static create<C>(this): InstanceType<C>;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:482

Creates an instance of a class. Accepts either no arguments, or an object containing values to initialize the newly instantiated object with.

import EmberObject from '@ember/object';

const Person = EmberObject.extend({
  helloWorld() {
    alert(`Hi, my name is ${this.get('name')}`);
  }
});

let tom = Person.create({
  name: 'Tom Dale'
});

tom.helloWorld(); // alerts "Hi, my name is Tom Dale".

create will call the init function if defined during AnyObject.extend

If no arguments are passed to create, it will not set values to the new instance during initialization:

let noName = Person.create();
noName.helloWorld(); // alerts undefined

NOTE: For performance reasons, you cannot declare methods or computed properties during create. You should instead declare methods and computed properties when using extend.

Type Parameters#

C#

C extends typeof CoreObject

Parameters#

this#

C

Returns#

InstanceType<C>

Method#

create

For#

@ember/object

Static#

Inherited from#

Helper.create

Call Signature#

readonly static create<C, I, K, Args>(this, ...args): InstanceType<C> & MergeArray<Args>;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:483

Creates an instance of a class. Accepts either no arguments, or an object containing values to initialize the newly instantiated object with.

import EmberObject from '@ember/object';

const Person = EmberObject.extend({
  helloWorld() {
    alert(`Hi, my name is ${this.get('name')}`);
  }
});

let tom = Person.create({
  name: 'Tom Dale'
});

tom.helloWorld(); // alerts "Hi, my name is Tom Dale".

create will call the init function if defined during AnyObject.extend

If no arguments are passed to create, it will not set values to the new instance during initialization:

let noName = Person.create();
noName.helloWorld(); // alerts undefined

NOTE: For performance reasons, you cannot declare methods or computed properties during create. You should instead declare methods and computed properties when using extend.

Type Parameters#

C#

C extends typeof CoreObject

I#

I extends CoreObject

K#

K extends string | number | symbol

Args#

Args extends Partial<{ [Key in string | number | symbol]: I[Key] }>[]

Parameters#

this#

C

args#

...Args

Returns#

InstanceType<C> & MergeArray<Args>

Method#

create

For#

@ember/object

Static#

Inherited from#

Helper.create

detectInstance()#

readonly static detectInstance(obj): obj is CoreObject;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:585

Parameters#

obj#

unknown

Returns#

obj is CoreObject

Inherited from#

Helper.detectInstance

extend()#

readonly static extend<Statics, Instance, M>(this, ...mixins?): Readonly<Statics> & EmberClassConstructor<Instance> & MergeArray<M>;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:440

Creates a new subclass.

import EmberObject from '@ember/object';

const Person = EmberObject.extend({
  say(thing) {
    alert(thing);
   }
});

This defines a new subclass of EmberObject: Person. It contains one method: say().

You can also create a subclass from any existing class by calling its extend() method. For example, you might want to create a subclass of Ember's built-in Component class:

import Component from '@ember/component';

const PersonComponent = Component.extend({
  tagName: 'li',
  classNameBindings: ['isAdministrator']
});

When defining a subclass, you can override methods but still access the implementation of your parent class by calling the special _super() method:

import EmberObject from '@ember/object';

const Person = EmberObject.extend({
  say(thing) {
    let name = this.get('name');
    alert(`${name} says: ${thing}`);
  }
});

const Soldier = Person.extend({
  say(thing) {
    this._super(`${thing}, sir!`);
  },
  march(numberOfHours) {
    alert(`${this.get('name')} marches for ${numberOfHours} hours.`);
  }
});

let yehuda = Soldier.create({
  name: 'Yehuda Katz'
});

yehuda.say('Yes');  // alerts "Yehuda Katz says: Yes, sir!"

The create() on line #17 creates an instance of the Soldier class. The extend() on line #8 creates a subclass of Person. Any instance of the Person class will not have the march() method.

You can also pass Mixin classes to add additional properties to the subclass.

import EmberObject from '@ember/object';
import Mixin from '@ember/object/mixin';

const Person = EmberObject.extend({
  say(thing) {
    alert(`${this.get('name')} says: ${thing}`);
  }
});

const SingingMixin = Mixin.create({
  sing(thing) {
    alert(`${this.get('name')} sings: la la la ${thing}`);
  }
});

const BroadwayStar = Person.extend(SingingMixin, {
  dance() {
    alert(`${this.get('name')} dances: tap tap tap tap `);
  }
});

The BroadwayStar class contains three methods: say(), sing(), and dance().

Type Parameters#

Statics#

Statics

Instance#

Instance

M#

M extends unknown[]

Parameters#

this#

Statics & EmberClassConstructor<Instance>

mixins?#

...M

One or more Mixin classes

Returns#

Readonly<Statics> & EmberClassConstructor<Instance> & MergeArray<M>

Method#

extend

Static#

For#

@ember/object

Inherited from#

Helper.extend

keys()#

static keys(): Set<string>;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:157

Internal

Returns#

Set<string>

Inherited from#

Helper.keys

proto()#

readonly static proto(): CoreObject;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:631

Returns#

CoreObject

Inherited from#

Helper.proto

reopenClass()#

readonly static reopenClass<C>(this, ...mixins): C;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:583

Augments a constructor's own properties and functions:

import EmberObject from '@ember/object';

const MyObject = EmberObject.extend({
  name: 'an object'
});

MyObject.reopenClass({
  canBuild: false
});

MyObject.canBuild; // false
o = MyObject.create();

In other words, this creates static properties and functions for the class. These are only available on the class and not on any instance of that class.

import EmberObject from '@ember/object';

const Person = EmberObject.extend({
  name: '',
  sayHello() {
    alert(`Hello. My name is ${this.get('name')}`);
  }
});

Person.reopenClass({
  species: 'Homo sapiens',

  createPerson(name) {
    return Person.create({ name });
  }
});

let tom = Person.create({
  name: 'Tom Dale'
});
let yehuda = Person.createPerson('Yehuda Katz');

tom.sayHello(); // "Hello. My name is Tom Dale"
yehuda.sayHello(); // "Hello. My name is Yehuda Katz"
alert(Person.species); // "Homo sapiens"

Note that species and createPerson are not valid on the tom and yehuda variables. They are only valid on Person.

To add functions and properties to instances of a constructor by extending the constructor's prototype see reopen

Type Parameters#

C#

C extends typeof CoreObject

Parameters#

this#

C

mixins#

...(Record<string, unknown> | Mixin)[]

Returns#

C

Method#

reopenClass

For#

@ember/object

Static#

Inherited from#

Helper.reopenClass

toString()#

static toString(): string;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:632

Returns#

string

Inherited from#

Helper.toString

willReopen()#

readonly static willReopen(): void;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/core.d.ts:521

Returns#

void

Inherited from#

Helper.willReopen

without()#

static without(...args): Mixin;

Defined in: node_modules/.pnpm/ember-source@7.3.0_@glimmer+component@2.1.1_supports-color@8.1.1__supports-color@8.1.1/node_modules/ember-source/types/stable/@ember/object/mixin.d.ts:155

Internal

Parameters#

args#

...any[]

Returns#

Mixin

Inherited from#

Helper.without