jquery - jquery的自动完成事件问题

Question

我在输入中使用键盘按键事件使用自动完成事件

$(function() {
  var availableTags = ["Amsterdam, Netherlands"];

  function split(val) {
    return val.split(/,\s*/);
  }

  function extractLast(term) {
    return split(term).pop();
  }

  $("#tags")
    // don't navigate away from the field on tab when selecting an item
    .on("keydown", function(event) {
      if (event.keyCode === $.ui.keyCode.TAB &&
        $(this).autocomplete("instance").menu.active) {
        event.preventDefault();
      }
    })
    .autocomplete({
      minLength: 0,
      source: function(request, response) {
        // delegate back to autocomplete, but extract the last term
        response($.ui.autocomplete.filter(
          availableTags, extractLast(request.term)));
      },
      focus: function() {
        // prevent value inserted on focus
        return false;
      },
      select: function(event, ui) {
        var terms = split(this.value);
        // remove the current input
        terms.pop();
        // add the selected item
        terms.push(ui.item.value);
        // add placeholder to get the comma-and-space at the end
        terms.push("");
        this.value = terms.join(", ");
        return false;
      }
    });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<link href="http://code.jquery.com/ui/1.10.2/themes/smoothness/jquery-ui.css" rel="Stylesheet"></link>
<script src="http://code.jquery.com/ui/1.10.2/jquery-ui.js"></script>
<input type="text" name="server_locations" class="form-control" placeholder="city" id="tags">

我正在使用此代码在我的项目中设置自动完成城市名称

但是当我使用此代码时，我收到了

未捕获的类型错误：无法读取未定义的属性“keyCode”

我不知道为什么会这样。

谁能帮我解决这个问题

标签： jqueryhtml

Answer 1

您的代码段不起作用！

我复制并更改为jquery ui 1.12.1.

它正在工作！如果您需要任何进一步的信息，请随时发表评论。

$(function() {
  var availableTags = ["Amsterdam, Netherlands"];

  function split(val) {
    return val.split(/,\s*/);
  }

  function extractLast(term) {
    return split(term).pop();
  }

  $("#tags")
    // don't navigate away from the field on tab when selecting an item
    .on("keydown", function(event) {
      if (event.keyCode === $.ui.keyCode.TAB &&
        $(this).autocomplete("instance").menu.active) {
        event.preventDefault();
      }
    })
    .autocomplete({
      minLength: 0,
      source: function(request, response) {
        // delegate back to autocomplete, but extract the last term
        response($.ui.autocomplete.filter(
          availableTags, extractLast(request.term)));
      },
      focus: function() {
        // prevent value inserted on focus
        return false;
      },
      select: function(event, ui) {
        var terms = split(this.value);
        // remove the current input
        terms.pop();
        // add the selected item
        terms.push(ui.item.value);
        // add placeholder to get the comma-and-space at the end
        terms.push("");
        this.value = terms.join(", ");
        return false;
      }
    });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<link href="http://code.jquery.com/ui/1.10.2/themes/smoothness/jquery-ui.css" rel="Stylesheet"></link>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<input type="text" name="server_locations" class="form-control" placeholder="city" id="tags">