appendTo显示奇怪的行为

Question

What I am trying to do (for now) is query the Wikipedia API with a search string,

$(document).ready(function() {
  $(".search").on("click", getArticles);

  function getArticles() {
    var searchTerm = $("#wiki-search").val().trim();
    console.log(searchTerm);
    var url = "http://en.wikipedia.org//w/api.php?callback=?";
    $.getJSON(url, {
      action: "query",
      format: "json",
      list: "search",
      srprop: "snippet",
      srlimit: 10,
      srsearch: searchTerm
    }, displayArticles);

and from the returned JSON object, display the value of a particular property ( snippet in this case) by appending it to a div element:

function displayArticles(wikiJSON) {
  if(wikiJSON.query.searchinfo.totalhits === 0) {
    // resultsDiv.innerHTML = "No results found";
    $("<h3>No results Found</h3>").appendTo("#resultsID");
  }
    else {
      $(wikiJSON.query.search[0].snippet).appendTo("#resultsID");
    }

But as seen in this pen , the snippet value is flashed momentarily on the screen and is gone. Could anyone please explain what's going wrong with my code?

HTML:

      <form role="form">
        <div class="input-group">
          <input class="form-control" id="wiki-search" type="text" placeholder="Enter search string...">
          <span class="input-group-btn">
            <button class = "btn btn-default search">
              <i class = "glyphicon glyphicon-search"></i>
            </button>
          </span>
          <span class="input-group-btn">
            <button class = "btn btn-default random">
              <i class = "glyphicon glyphicon-random"></i>
            </button>
          </span>
        </div>
      </form>
  <div class= "row result-group">
    <div class = "col-xs-12 col-sm-8 col-sm-offest-2 col-md-6 col-md-offset-3">
      <div class = "results" id = "resultsID">


    </div>

Answer 1

There are two issues.

---

First, your button is implicitly submitting the form (its default type is submit ).

So you need to add type="button" to your button elements.

---

Secondly, the returned html cannot be sent to the jQuery constructor because it is not syntactically correct according to the jQuery constructor. There is a logged error message: " Uncaught Error: Syntax error, unrecognized expression ". The result should be sent to the .html() function.

$("<div>").html(wikiJSON.query.search[0].snippet).appendTo("#resultsID")

Working pen