javascript - Google Places Autocomplete - 在 Enter 键上选择第一个结果？

Question

我正在使用 Google Places Autocomplete，我只是希望它在表单字段中按下回车键并且存在建议时选择结果列表中的顶部项目。我知道以前有人问过这个问题：

Google 地图 Places API V3 自动完成 - 输入时选择第一个选项

Google maps Places API V3 自动完成 - 在输入时选择第一个选项（并保持这种状态）

但是这些问题的答案似乎并没有真正起作用，或者它们解决了特定的附加功能。

看起来像下面这样的东西应该工作（但它没有）：

$("input#autocomplete").keydown(function(e) {
  if (e.which == 13) {          
    //if there are suggestions...
    if ($(".pac-container .pac-item").length) {
      //click on the first item in the list or simulate a down arrow key event
      //it does get this far, but I can't find a way to actually select the item
      $(".pac-container .pac-item:first").click();
    } else {
      //there are no suggestions
    }
  }
});

任何建议将不胜感激！

score 20 · Accepted Answer

在发现最好的答案是这个之前，我已经阅读了这个问题的许多答案以及链接问题的答案很多次（注意：遗憾的是，这不是公认的答案！）。

我已经修改了 2 或 3 行代码，将其变成了一个随时可用的函数，您可以在代码中复制/粘贴，input并在需要时应用于许多元素。这里是：

var selectFirstOnEnter = function(input) {  // store the original event binding function
    var _addEventListener = (input.addEventListener) ? input.addEventListener : input.attachEvent;
    function addEventListenerWrapper(type, listener) {  // Simulate a 'down arrow' keypress on hitting 'return' when no pac suggestion is selected, and then trigger the original listener.
        if (type == "keydown") { 
            var orig_listener = listener;
            listener = function(event) {
                var suggestion_selected = $(".pac-item-selected").length > 0;
                if (event.which == 13 && !suggestion_selected) { 
                    var simulated_downarrow = $.Event("keydown", {keyCode: 40, which: 40}); 
                    orig_listener.apply(input, [simulated_downarrow]); 
                }
                orig_listener.apply(input, [event]);
            };
        }
        _addEventListener.apply(input, [type, listener]); // add the modified listener
    }
    if (input.addEventListener) { 
        input.addEventListener = addEventListenerWrapper; 
    } else if (input.attachEvent) { 
        input.attachEvent = addEventListenerWrapper; 
    }
}

用法：

selectFirstOnEnter(input1);
selectFirstOnEnter(input2);
...

score 9 · Accepted Answer

我正在从Google maps Places API V3 自动完成重新发布我的答案 - 在输入时选择第一个选项：

似乎有一个更好更干净的解决方案：使用google.maps.places.SearchBox而不是google.maps.places.Autocomplete. 代码几乎相同，只是从多个地方获取第一个。按 Enter 后，将返回正确的列表 - 因此它开箱即用，无需破解。

请参阅示例 HTML 页面：

http://rawgithub.com/klokan/8408394/raw/5ab795fb36c67ad73c215269f61c7648633ae53e/places-enter-first-item.html

相关的代码片段是：

var searchBox = new google.maps.places.SearchBox(document.getElementById('searchinput'));

google.maps.event.addListener(searchBox, 'places_changed', function() {
  var place = searchBox.getPlaces()[0];

  if (!place.geometry) return;

  if (place.geometry.viewport) {
    map.fitBounds(place.geometry.viewport);
  } else {
    map.setCenter(place.geometry.location);
    map.setZoom(16);
  }
});

该示例的完整源代码位于：https ://gist.github.com/klokan/8408394

score 6 · Accepted Answer

侦听用户是否已开始使用键盘向下导航列表而不是每次触发错误导航的工作解决方案

https://codepen.io/callam/pen/RgzxZB

这是重要的部分

// search input
const searchInput = document.getElementById('js-search-input');

// Google Maps autocomplete
const autocomplete = new google.maps.places.Autocomplete(searchInput);

// Has user pressed the down key to navigate autocomplete options?
let hasDownBeenPressed = false;

// Listener outside to stop nested loop returning odd results
searchInput.addEventListener('keydown', (e) => {
    if (e.keyCode === 40) {
        hasDownBeenPressed = true;
    }
});

// GoogleMaps API custom eventlistener method
google.maps.event.addDomListener(searchInput, 'keydown', (e) => {

    // Maps API e.stopPropagation();
    e.cancelBubble = true;

    // If enter key, or tab key
    if (e.keyCode === 13 || e.keyCode === 9) {
        // If user isn't navigating using arrows and this hasn't ran yet
        if (!hasDownBeenPressed && !e.hasRanOnce) {
            google.maps.event.trigger(e.target, 'keydown', {
                keyCode: 40,
                hasRanOnce: true,
            });
        }
    }
});

 // Clear the input on focus, reset hasDownBeenPressed
searchInput.addEventListener('focus', () => {
    hasDownBeenPressed = false;
    searchInput.value = '';
});

// place_changed GoogleMaps listener when we do submit
google.maps.event.addListener(autocomplete, 'place_changed', function() {

    // Get the place info from the autocomplete Api
    const place = autocomplete.getPlace();

    //If we can find the place lets go to it
    if (typeof place.address_components !== 'undefined') {          
        // reset hasDownBeenPressed in case they don't unfocus
        hasDownBeenPressed = false;
    }

});

score 5 · Accepted Answer

在我的站点中，为了实现相同的功能，我需要 jQuery 模拟插件（https://github.com/jquery/jquery-simulate），然后附加事件：

$("input#autocomplete").focusin(function () {
    $(document).keypress(function (e) {
        if (e.which == 13) {
            $("input#autocomplete").trigger('focus');
            $("input#autocomplete").simulate('keydown', { keyCode: $.ui.keyCode.DOWN } ).simulate('keydown', { keyCode: $.ui.keyCode.ENTER });
        }
    });
});

该插件将模拟按下 DOWN 然后 ENTER 键的动作，ENTER 本身不起作用，我找不到另一种选择第一个选项的方法。

希望这可以帮助

score 3 · Accepted Answer

这是解决我的最简单方法：

autocomplete.addListener('place_changed', function() {
  if(event.keyCode == 13 || event.keyCode == 9) { // detect the enter key
    var firstValue = $(".pac-container .pac-item:first").text(); // assign to this variable the first string from the autocomplete dropdown
     }
    $('#search-address').val(firstValue); // add this string to input
    console.log(firstValue); // display the string on your browser console to check what it is
   //(...) add the rest of your code here
  });
}

score 2 · Accepted Answer

这就是我所做的并且有效：

HTML：

<input name="location" id="autocomplete" autocomplete="off" type="text" class="textbx" placeholder="Enter Destination" required>

googleautocompletecustomized.js：

        function initialize() {
      // Create the autocomplete object, restricting the search
      // to geographical location types.
      if($('#autocomplete').length){
          autocomplete = new google.maps.places.Autocomplete(
              (document.getElementById('autocomplete')),
              {
                types: ['(regions)'],
                componentRestrictions: {country: "in"}
              });
          google.maps.event.addListener(autocomplete, 'place_changed', function() {
            $('#autocomplete').closest('form').data('changed', true);
            fillInAddress();
          });         
      }

    //select first result
        $('#autocomplete').keydown(function (e) {
            if (e.keyCode == 13 || e.keyCode == 9) {
                $(e.target).blur();
                if($(".pac-container .pac-item:first span:eq(3)").text() == "")
                    var firstResult = $(".pac-container .pac-item:first .pac-item-query").text();
                else
                    var firstResult = $(".pac-container .pac-item:first .pac-item-query").text() + ", " + $(".pac-container .pac-item:first span:eq(3)").text();

                var geocoder = new google.maps.Geocoder();
                geocoder.geocode({"address":firstResult }, function(results, status) {
                    if (status == google.maps.GeocoderStatus.OK) {
                        placeName = results[0];
                        e.target.value = firstResult;
                        fillInAddress(placeName);
                        $('#datetimepicker1 .input-group-addon').click();
                    }
                });
            }

        });
    }

// [START region_fillform]
function fillInAddress(place) {
  // Get the place details from the autocomplete object.
  if(!place)
    var place = autocomplete.getPlace();

  for (var component in componentForm) {
    document.getElementById(component).value = '';
    document.getElementById(component).disabled = false;
  }

  // Get each component of the address from the place details
  // and fill the corresponding field on the form.
  for (var i = 0; i < place.address_components.length; i++) {
    var addressType = place.address_components[i].types[0];
    if (componentForm[addressType]) {
      var val = place.address_components[i][componentForm[addressType]];
      document.getElementById(addressType).value = val;

    }
  }

}

score 0 · Accepted Answer

如果您使用的是Angular 2,4, 5 & 6，请在下面的链接中找到答案

Angular 6，AGM 在谷歌自动完成中选择第一个地址

Angular AGM 自动完成第一个地址建议

score -1 · Accepted Answer

将输入元素放在表单元素之外。使用 javascript 填充表单。

document.getElementById("adress").value = place.formatted_address;

score -1 · Accepted Answer

我做了一些解决这个问题，现在我可以使用角度 js 和角度自动完成模块从谷歌地方强制选择第一个选项。
感谢kuhnza
我的代码

<form method="get" ng-app="StarterApp"  ng-controller="AppCtrl" action="searchresults.html" id="target" autocomplete="off">
   <br/>
    <div class="row">
    <div class="col-md-4"><input class="form-control" tabindex="1" autofocus g-places-autocomplete force-selection="true"  ng-model="user.fromPlace" placeholder="From Place" autocomplete="off"   required>
    </div>
        <div class="col-md-4"><input class="form-control" tabindex="2"  g-places-autocomplete force-selection="true"  placeholder="To Place" autocomplete="off" ng-model="user.toPlace" required>
    </div>
    <div class="col-md-4"> <input class="btn btn-primary"  type="submit" value="submit"></div></div><br /><br/>
    <input class="form-control"  style="width:40%" type="text" name="sourceAddressLat" placeholder="From Place Lat" id="fromLat">
    <input class="form-control"  style="width:40%"type="text" name="sourceAddressLang" placeholder="From Place Long" id="fromLong">
    <input class="form-control"  style="width:40%"type="text" name="sourceAddress" placeholder="From Place City" id="fromCity">
    <input class="form-control"  style="width:40%"type="text" name="destinationAddressLat" placeholder="To Place Lat" id="toLat">
    <input class="form-control"  style="width:40%"type="text" name="destinationAddressLang" placeholder="To Place Long"id="toLong">
    <input class="form-control"  style="width:40%"type="text" name="destinationAddress"placeholder="To Place City" id="toCity">
</form>

这是一个Plunker
谢谢。

javascript - Google Places Autocomplete - 在 Enter 键上选择第一个结果？

9 回答 9

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