<button {{action "toggle" target="view"}} {{bind-attr class=":expando-toggle isExpanded"}}>
	{{#if view.isExpanded}}
		&#9660;
	{{else}}
		&#9658;
	{{/if}}
</button>
<button {{action "toggle" target="view"}} class="expando-toggle {{if view.isExpanded "is-expanded"}}">
	{{#if view.isExpanded}}
		&#9660;
	{{else}}
		&#9658;
	{{/if}}
</button>
Use HTMLBars inline `if` to define class name
Use HTMLBars inline `if` to define class name
