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30 lines
825 B
JavaScript
30 lines
825 B
JavaScript
import computed from 'ember-computed';
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/**
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* Defines a property similarly to `Ember.computed.oneway`,
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* save that while a `oneway` loses its binding upon being set,
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* the `BoundOneWay` will continue to listen for upstream changes.
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*
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* This is an ideal tool for working with values inside of {{input}}
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* elements.
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* @param {*} upstream
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* @param {function} transform a function to transform the **upstream** value.
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*/
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export default function (upstream, transform) {
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if (typeof transform !== 'function') {
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// default to the identity function
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transform = function (value) {
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return value;
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};
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}
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return computed(upstream, {
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get() {
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return transform(this.get(upstream));
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},
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set(key, value) {
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return value;
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}
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});
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}
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