Button Bar

components.button-row\.js

import Component from '@glimmer/component';

const ALIGN = {
  start: 'button-row--start',
  center: 'button-row--center',
  end: 'button-row--end',
  stretch: 'button-row--stretch',
  flush: 'button-row--flush',
  'space-around': 'button-row--space-around',
  'space-between': 'button-row--space-between',
  'space-evenly': 'button-row--space-evenly',
};

const SPACING = {
  none: 'button-row--spacing-none',
  small: 'button-row--spacing-small',
}

export default class extends Component {
  get alignmentClass() {
    return ALIGN[this.args.align];
  }
  
  get spacingClass() {
    const { spacing = 'small' } = this.args;
    
    return SPACING[spacing];
  }
}

components.button\.js

import Component from '@glimmer/component';

export default class extends Component {
}

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

styles.app\.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.button {
	border: 1px solid magenta;
  border-radius: 5px;
  display: inline-block;
  font-weight: bold;
  padding: 8px 12px;
}

.button-row {
  display: flex;
  justify-content: left;
  margin: 8px 0;
}

.button-row--spacing-none {
  column-gap: 0;
}

.button-row--spacing-small {
  column-gap: 8px;
}

.button-row--center {
  justify-content: center;
}

.button-row--end {
  justify-content: right;
}

.button-row--stretch .button {
	flex-grow: 1;
  border-radius: 0;
}

.button-row--spacing-none .button + .button {
  border-left: 0;
}

templates.application\.hbs

<h1>Button Bar</h1>

<h2>Start</h2>

<ButtonRow @align="start">
  <Button>One</Button>
  <Button>Two</Button>
  <Button>Three</Button>
</ButtonRow>

<h2>Center</h2>

<ButtonRow @align="center">
  <Button>One</Button>
  <Button>Two</Button>
  <Button>Three</Button>
</ButtonRow>

<h2>End</h2>

<ButtonRow @align="end">
  <Button>One</Button>
  <Button>Two</Button>
  <Button>Three</Button>
</ButtonRow>

<h2>Stretch</h2>

<ButtonRow @align="stretch">
  <Button>One</Button>
</ButtonRow>

<ButtonRow @align="stretch">
  <Button>One</Button>
  <Button>Two</Button>
</ButtonRow>

<ButtonRow @align="stretch">
  <Button>One</Button>
  <Button>Two</Button>
  <Button>Three</Button>
</ButtonRow>

<h2>Stretch (<code>@spacing='none'</code>)</h2>

<ButtonRow @align="stretch" @spacing="none">
  <Button>One</Button>
</ButtonRow>

<ButtonRow @align="stretch" @spacing="none">
  <Button>One</Button>
  <Button>Two</Button>
</ButtonRow>

<ButtonRow @align="stretch" @spacing="none">
  <Button>One</Button>
  <Button>Two</Button>
  <Button>Three</Button>
</ButtonRow>

templates.components.button-row\.hbs

<div class="button-row {{this.alignmentClass}} {{this.spacingClass}}">
  {{yield}}
</div>

templates.components.button\.hbs

<button type="button" class="button">
  {{yield}}
</button>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}