Function

max (dependentKey) ComputedProperty public

Defined in packages/@ember/object/lib/computed/reduce_computed_macros.js:88

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

dependentKey

String

returns

ComputedProperty

computes the largest value in the dependentKey's array

A computed property that calculates the maximum value in the dependent array. This will return -Infinity when the dependent array is empty.

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import { mapBy, max } from '@ember/object/computed';
import EmberObject from '@ember/object';

let Person = EmberObject.extend({
  childAges: mapBy('children', 'age'),
  maxChildAge: max('childAges')
});

let lordByron = Person.create({ children: [] });

lordByron.get('maxChildAge'); // -Infinity
lordByron.get('children').pushObject({
  name: 'Augusta Ada Byron', age: 7
});
lordByron.get('maxChildAge'); // 7
lordByron.get('children').pushObjects([{
  name: 'Allegra Byron',
  age: 5
}, {
  name: 'Elizabeth Medora Leigh',
  age: 8
}]);
lordByron.get('maxChildAge'); // 8

If the types of the arguments are not numbers, they will be converted to numbers and the type of the return value will always be Number. For example, the max of a list of Date objects will be the highest timestamp as a Number. This behavior is consistent with Math.max.