javascript - Google Autocomplete Places API 不会通过 TAB 触发更改事件

Question

根据 Google Autocomplete Places API 文档，getPlace() 调用应返回包含所有位置数据的 Places 对象，或者，如果该地点不存在(即 - 用户忽略了建议)，它应该返回一个只填充了 Places 对象的名称元素的 stub 。但是，它只在用户按下 ENTER 时执行后一个操作，如果他们 TAB 离开该字段则不会。

我已经尝试查看更改事件、keyup、keydown 事件。我已经尝试在模糊等情况下使用 keycode 13 触发 keydown 事件，等等。似乎没有任何效果。

有人解决过这个问题吗？很明显，用户会通过 tab 键浏览表单，而且他们总是有可能忽略这些建议。

Answer 1

pac-input 作为您的位置搜索输入，您可以执行以下操作:

// Trigger search on blur
document.getElementById('pac-input').onblur = function () {

    google.maps.event.trigger(this, 'focus', {});
    google.maps.event.trigger(this, 'keydown', {
        keyCode: 13
    });
};

或者使用谷歌地图事件监听器:

// Trigger search on blur
google.maps.event.addDomListener(document.getElementById("pac-input"), 'blur', function() {

    google.maps.event.trigger(this, 'focus', {});
    google.maps.event.trigger(this, 'keydown', {
        keyCode: 13
    });
});

---

编辑:如评论中所述，这会扰乱用户通过鼠标点击选择地点的“正常行为”。

下面是一个使用纯 Javascript 的完整示例。对于(更简单的)jQuery 解决方案，请查看 @ChrisSnyder's answer .

function initialize() {

  var ac = new google.maps.places.Autocomplete(
    (document.getElementById('autocomplete')), {
      types: ['geocode']
    });

  ac.addListener('place_changed', function() {

    var place = ac.getPlace();

    if (!place.geometry) {

      // User entered the name of a Place that was not suggested and
      // pressed the Enter key, or the Place Details request failed.
      console.log("No details available for input: '" + place.name + "'");
      return;
    }

    console.log("You selected: '" + place.formatted_address + "'");
  });

  // Trigger search on blur
  google.maps.event.addDomListener(document.getElementById("autocomplete"), 'blur', function() {

    // Find the pac-container element
    var pacContainer = nextByClass(this, 'pac-container');

    // Check if we are hovering on one of the pac-items
    // :hover propagates to parent element so we only need to check it on the pac-container
    // We trigger the focus and keydown only if :hover is false otherwise it will interfere with a place selection via mouse click
    if (pacContainer.matches(':hover') === false) {

      google.maps.event.trigger(this, 'focus', {});
      google.maps.event.trigger(this, 'keydown', {
        keyCode: 13
      });
    }

  });
}

function hasClass(elem, cls) {
  var str = " " + elem.className + " ";
  var testCls = " " + cls + " ";
  return (str.indexOf(testCls) != -1);
}

function nextByClass(node, cls) {
  while (node = node.nextSibling) {
    if (hasClass(node, cls)) {
      return node;
    }
  }
  return null;
}

#autocomplete {
  width: 300px;
}

<script src="https://maps.googleapis.com/maps/api/js?libraries=places&callback=initialize&key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk" async defer></script>
<input id="autocomplete" placeholder="Enter your address" type="text"></input>