title: VUE how to replace json variables
body: <p>I have defined in <code>data()</code> JSON and url variable:</p>
  <pre><code>data() {
  return {
    url: '',
    startsession: {
      cmd: 'start',
      width: 1024,
      height: 800,
      url: 'https://www.test.com',
      token: '',
      service_id: 1,
      thumbnail_width: 100,
      thumbnail_height: 100,
    },
  </code></pre>
  <p>url is assigned to input:</p>
  <pre><code>&lt;b-form-input v-model=&quot;url&quot; /&gt;
  </code></pre>
  <p>I also have button:</p>
  <pre><code>&lt;b-button
      @click=&quot;sendMessage(startsession)&quot;
    &gt;
  </code></pre>
  <p>Could you please help me, how to replace 'url' param in JSON with url variable from input, that when i click button, the 'sesstionstart' JSON will have value from input?</p>