title: Why is this.$route.params null?
body: <p>I want to pass data to another page and I use the following code:</p>
  <pre><code>  this.$router.push({ path: '/guard/foreigner-list', params: data});
  </code></pre>
  <p>Then I expect item is equal to data, but item is null</p>
  <pre><code>let item = this.$route.params;
  </code></pre>