If you need to display all of the keys or values of a JavaScript object in your template,
you can use the {{#each-in}}
helper:
import Component from '@ember/component';
export default Component.extend({
willRender() {
// Set the "categories" property to a JavaScript object
// with the category name as the key and the value a list
// of products.
this.set('categories', {
'Bourbons': ['Bulleit', 'Four Roses', 'Woodford Reserve'],
'Ryes': ['WhistlePig', 'High West']
});
}
});
The template inside of the {{#each-in}}
block is repeated once for each key in the passed object.
The first block parameter (category
in the above example) is the key for this iteration,
while the second block parameter (products
) is the actual value of that key.
The above example will print a list like this:
<ul>
<li>Bourbons
<ol>
<li>Bulleit</li>
<li>Four Roses</li>
<li>Woodford Reserve</li>
</ol>
</li>
<li>Ryes
<ol>
<li>WhistlePig</li>
<li>High West</li>
</ol>
</li>
</ul>
Ordering
An object's keys will be listed in the same order as the array returned from calling Object.keys
on that object.
If you want a different sort order, you should use Object.keys
to get an array, sort that array with the built-in JavaScript tools,
and use the {{#each}}
helper instead.
Empty Lists
The {{#each-in}}
helper can have a matching {{else}}
.
The contents of this block will render if the object is empty, null, or undefined:
Hello, ! You are years old.
Sorry, nobody is here.