title: Aurelia throttle on printed value with value converter
body: <p>Aurelia has <em>string interpolation</em>. If you bind a <code>string</code>, <code>number</code> or <code>boolean</code> to that variable, that is bound <code>one-way</code>.</p>
  
  <p>However, if you bind an object and use a <code>ValueConverter</code>, like I want to, it gets bound <code>one-time</code>.</p>
  
  <p>How could I use the value-converter to bind <code>one-way</code> instead of <code>one-time</code>?</p>
  
  <p>I've tried using <code>${data | objectPrinter &amp; oneWay}</code> but that does not work.</p>
  
  <p><a href="https://gist.run/?id=b66266719e47b4d04539e10326948cce&amp;sha=68ccace29456995414fe854d0009c688061a78e6" rel="nofollow">Running code can be found on this gist</a></p>
  
  <p>app.html</p>
  
  <pre><code>&lt;template&gt;
    &lt;div class="row"&gt;
  
  &lt;!-- this isn't updated on change                 --&gt;
      &lt;pre&gt;${data | objectPrinter}&lt;/pre&gt;
  
    &lt;/div&gt;
  
    &lt;input value.two-way="data.branches"&gt;
  
  &lt;!-- this gets updated                            --&gt;
    ${data.branches}
  
  &lt;/template&gt;
  </code></pre>
  
  <p>app.js</p>
  
  <pre><code>export class App {
    data = {
      branches: "test"
    }
  }
  
  export class objectPrinterValueConverter {
    toView(obj){
      return JSON.stringify(obj, null, 4);
    }
  }
  </code></pre>
  
  <p>index.html</p>
  
  <pre><code>&lt;!doctype html&gt;
  &lt;html&gt;
    &lt;head&gt;
      &lt;title&gt;Aurelia&lt;/title&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
    &lt;/head&gt;
    &lt;body aurelia-app&gt;
      &lt;h1&gt;Loading...&lt;/h1&gt;
  
      &lt;script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"&gt;&lt;/script&gt;
      &lt;script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"&gt;&lt;/script&gt;
      &lt;script&gt;
        System.import('aurelia-bootstrapper');
      &lt;/script&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>