小贝子编程

添加到gmap方向元素



我使用的是谷歌地图JavaScript API，我想在短语"从"开始到"。adp-placemark"类，包含在Google的方向输出中:

$('.adp-placemark').prepend('Starting From:');

前缀不起作用。但是，如果我查看页面并在检查器中使用控制台工具，然后运行上面的代码，它将按原样添加。

我把这段代码放在哪里?我也试过把它放在一个单独的函数和内部文档准备。

function initMap() {
  var directionsDisplay = new google.maps.DirectionsRenderer;
  var directionsService = new google.maps.DirectionsService;
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 7,
    center: {lat: 41.85, lng: -87.65}
  });
  directionsDisplay.setMap(map);
  directionsDisplay.setPanel(document.getElementById('right-panel'));
  var control = document.getElementById('floating-panel');
  control.style.display = 'block';
  map.controls[google.maps.ControlPosition.TOP_CENTER].push(control);
  var onChangeHandler = function() {
    calculateAndDisplayRoute(directionsService, directionsDisplay);
  };
  document.getElementById('start').addEventListener('change', onChangeHandler);
  document.getElementById('end').addEventListener('change', onChangeHandler);
}
function calculateAndDisplayRoute(directionsService, directionsDisplay) {
  var start = document.getElementById('start').value;
  var end = document.getElementById('end').value;
  directionsService.route({
    origin: start,
    destination: end,
    travelMode: 'DRIVING'
  }, function(response, status) {
    if (status === 'OK') {
      directionsDisplay.setDirections(response);
      $('.adp-placemark').prepend('Starting From:');
    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
}
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map {
  height: 100%;
}
#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: 'Roboto','sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
#right-panel {
  font-family: 'Roboto','sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
#right-panel select, #right-panel input {
  font-size: 15px;
}
#right-panel select {
  width: 100%;
}
#right-panel i {
  font-size: 12px;
}
#right-panel {
  height: 100%;
  float: right;
  width: 390px;
  overflow: auto;
}
#map {
  margin-right: 400px;
}
#floating-panel {
  background: #fff;
  padding: 5px;
  font-size: 14px;
  font-family: Arial;
  border: 1px solid #ccc;
  box-shadow: 0 2px 2px rgba(33, 33, 33, 0.4);
  display: none;
}
@media print {
  #map {
    height: 500px;
    margin: 0;
  }
  #right-panel {
    float: none;
    width: auto;
  }
}
<div id="floating-panel">
  <strong>Start:</strong>
  <select id="start">
    <option value="chicago, il">Chicago</option>
    <option value="st louis, mo">St Louis</option>
    <option value="joplin, mo">Joplin, MO</option>
    <option value="oklahoma city, ok">Oklahoma City</option>
    <option value="amarillo, tx">Amarillo</option>
    <option value="gallup, nm">Gallup, NM</option>
    <option value="flagstaff, az">Flagstaff, AZ</option>
    <option value="winona, az">Winona</option>
    <option value="kingman, az">Kingman</option>
    <option value="barstow, ca">Barstow</option>
    <option value="san bernardino, ca">San Bernardino</option>
    <option value="los angeles, ca">Los Angeles</option>
  </select>
  <br>
  <strong>End:</strong>
  <select id="end">
    <option value="chicago, il">Chicago</option>
    <option value="st louis, mo">St Louis</option>
    <option value="joplin, mo">Joplin, MO</option>
    <option value="oklahoma city, ok">Oklahoma City</option>
    <option value="amarillo, tx">Amarillo</option>
    <option value="gallup, nm">Gallup, NM</option>
    <option value="flagstaff, az">Flagstaff, AZ</option>
    <option value="winona, az">Winona</option>
    <option value="kingman, az">Kingman</option>
    <option value="barstow, ca">Barstow</option>
    <option value="san bernardino, ca">San Bernardino</option>
    <option value="los angeles, ca">Los Angeles</option>
  </select>
</div>
<div id="right-panel"></div>
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?sensor=false&callback=initMap">
</script>

EDIT:正如评论中提到的，第一个解决方案是不完整的，因为'Starting from:'被添加到两个表中(我第一次错过了)

为了只使用CSS来解决这个问题，你可以添加nth-child(n)选择器来找到包含前置文本的.adp-placemark，如下所示:

    /* Pseudo-element to add 'Starting from:' to the first element that appears */
    .adp > div:nth-child(2) .adp-placemark::before {
      content: 'Starting from:';
      white-space: nowrap;
    }
    /* Pseudo-element to add 'Going to:' to the second element that appears */
    .adp > div:nth-child(3) .adp-placemark::before {
        content: 'Going to:';
        white-space: nowrap;
    }

另一方面，由于right-panel代码是由Google Maps Api生成的，我不会尝试以编程方式更改生成的HTML，因为最终Api可能提供不同的结构，这将使解决方案失败(在js或css的解决方案)。

解决这个问题的一种方法是在.adp-placemark中包含一个css伪类，这样就不需要正确地获得计时表呈现，如下所示:
.adp-placemark::before {
    content: 'Starting from:';
    white-space: nowrap;
}

我也更新了你的代码片段:

function initMap() {
  var directionsDisplay = new google.maps.DirectionsRenderer;
  var directionsService = new google.maps.DirectionsService;
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 7,
    center: {lat: 41.85, lng: -87.65}
  });
  directionsDisplay.setMap(map);
  directionsDisplay.setPanel(document.getElementById('right-panel'));
  var control = document.getElementById('floating-panel');
  control.style.display = 'block';
  map.controls[google.maps.ControlPosition.TOP_CENTER].push(control);
  var onChangeHandler = function() {
    calculateAndDisplayRoute(directionsService, directionsDisplay);
  };
  document.getElementById('start').addEventListener('change', onChangeHandler);
  document.getElementById('end').addEventListener('change', onChangeHandler);
}
function calculateAndDisplayRoute(directionsService, directionsDisplay) {
  var start = document.getElementById('start').value;
  var end = document.getElementById('end').value;
  directionsService.route({
    origin: start,
    destination: end,
    travelMode: 'DRIVING'
  }, function(response, status) {
    if (status === 'OK') {
      directionsDisplay.setDirections(response);
      $('.adp-placemark').prepend('Starting From:');
    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
}
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map {
  height: 100%;
}
#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: 'Roboto','sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
#right-panel {
  font-family: 'Roboto','sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
#right-panel select, #right-panel input {
  font-size: 15px;
}
#right-panel select {
  width: 100%;
}
#right-panel i {
  font-size: 12px;
}
#right-panel {
  height: 100%;
  float: right;
  width: 390px;
  overflow: auto;
}
#map {
  margin-right: 400px;
}
#floating-panel {
  background: #fff;
  padding: 5px;
  font-size: 14px;
  font-family: Arial;
  border: 1px solid #ccc;
  box-shadow: 0 2px 2px rgba(33, 33, 33, 0.4);
  display: none;
}
/* Pseudo-element to add 'Starting from:' to the first element that appears */
.adp > div:nth-child(2) .adp-placemark::before {
  content: 'Starting from:';
  white-space: nowrap;
}
/* Pseudo-element to add 'Going to:' to the second element that appears */
.adp > div:nth-child(3) .adp-placemark::before {
    content: 'Going to:';
    white-space: nowrap;
}
@media print {
  #map {
    height: 500px;
    margin: 0;
  }
  #right-panel {
    float: none;
    width: auto;
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="floating-panel">
  <strong>Start:</strong>
  <select id="start">
    <option value="chicago, il">Chicago</option>
    <option value="st louis, mo">St Louis</option>
    <option value="joplin, mo">Joplin, MO</option>
    <option value="oklahoma city, ok">Oklahoma City</option>
    <option value="amarillo, tx">Amarillo</option>
    <option value="gallup, nm">Gallup, NM</option>
    <option value="flagstaff, az">Flagstaff, AZ</option>
    <option value="winona, az">Winona</option>
    <option value="kingman, az">Kingman</option>
    <option value="barstow, ca">Barstow</option>
    <option value="san bernardino, ca">San Bernardino</option>
    <option value="los angeles, ca">Los Angeles</option>
  </select>
  <br>
  <strong>End:</strong>
  <select id="end">
    <option value="chicago, il">Chicago</option>
    <option value="st louis, mo">St Louis</option>
    <option value="joplin, mo">Joplin, MO</option>
    <option value="oklahoma city, ok">Oklahoma City</option>
    <option value="amarillo, tx">Amarillo</option>
    <option value="gallup, nm">Gallup, NM</option>
    <option value="flagstaff, az">Flagstaff, AZ</option>
    <option value="winona, az">Winona</option>
    <option value="kingman, az">Kingman</option>
    <option value="barstow, ca">Barstow</option>
    <option value="san bernardino, ca">San Bernardino</option>
    <option value="los angeles, ca">Los Angeles</option>
  </select>
</div>
<div id="right-panel"></div>
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?sensor=false&callback=initMap">
</script>

希望有帮助，欢呼。

您需要等待侧面板呈现(Google Maps Javascript API是事件驱动和异步的)。在前置操作周围添加一个setTimeout可以工作(证明了这个概念，尽管它很笨拙):

setTimeout(function() {
  $('.adp-placemark').prepend('Starting From:');
}, 500);

(您还需要将jQuery添加到您的代码片段中以使其工作…)这会导致浏览器延迟prepend操作，直到完成侧面板的呈现。

function initMap() {
  var directionsDisplay = new google.maps.DirectionsRenderer;
  var directionsService = new google.maps.DirectionsService;
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 7,
    center: {
      lat: 41.85,
      lng: -87.65
    }
  });
  directionsDisplay.setMap(map);
  directionsDisplay.setPanel(document.getElementById('right-panel'));
  var control = document.getElementById('floating-panel');
  control.style.display = 'block';
  map.controls[google.maps.ControlPosition.TOP_CENTER].push(control);
  var onChangeHandler = function() {
    calculateAndDisplayRoute(directionsService, directionsDisplay);
  };
  document.getElementById('start').addEventListener('change', onChangeHandler);
  document.getElementById('end').addEventListener('change', onChangeHandler);
}
function calculateAndDisplayRoute(directionsService, directionsDisplay) {
  var start = document.getElementById('start').value;
  var end = document.getElementById('end').value;
  directionsService.route({
    origin: start,
    destination: end,
    travelMode: 'DRIVING'
  }, function(response, status) {
    if (status === 'OK') {
      directionsDisplay.setDirections(response);
      setTimeout(function() {
        $('.adp-placemark').prepend('Starting From:');
      }, 500);
    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
}
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
#map {
  height: 100%;
}
#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: 'Roboto', 'sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
#right-panel {
  font-family: 'Roboto', 'sans-serif';
  line-height: 30px;
  padding-left: 10px;
}
#right-panel select,
#right-panel input {
  font-size: 15px;
}
#right-panel select {
  width: 100%;
}
#right-panel i {
  font-size: 12px;
}
#right-panel {
  height: 100%;
  float: right;
  width: 390px;
  overflow: auto;
}
#map {
  margin-right: 400px;
}
#floating-panel {
  background: #fff;
  padding: 5px;
  font-size: 14px;
  font-family: Arial;
  border: 1px solid #ccc;
  box-shadow: 0 2px 2px rgba(33, 33, 33, 0.4);
  display: none;
}
@media print {
  #map {
    height: 500px;
    margin: 0;
  }
  #right-panel {
    float: none;
    width: auto;
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="floating-panel">
  <strong>Start:</strong>
  <select id="start">
    <option value="chicago, il">Chicago</option>
    <option value="st louis, mo">St Louis</option>
    <option value="joplin, mo">Joplin, MO</option>
    <option value="oklahoma city, ok">Oklahoma City</option>
    <option value="amarillo, tx">Amarillo</option>
    <option value="gallup, nm">Gallup, NM</option>
    <option value="flagstaff, az">Flagstaff, AZ</option>
    <option value="winona, az">Winona</option>
    <option value="kingman, az">Kingman</option>
    <option value="barstow, ca">Barstow</option>
    <option value="san bernardino, ca">San Bernardino</option>
    <option value="los angeles, ca">Los Angeles</option>
  </select>
  <br>
  <strong>End:</strong>
  <select id="end">
    <option value="chicago, il">Chicago</option>
    <option value="st louis, mo">St Louis</option>
    <option value="joplin, mo">Joplin, MO</option>
    <option value="oklahoma city, ok">Oklahoma City</option>
    <option value="amarillo, tx">Amarillo</option>
    <option value="gallup, nm">Gallup, NM</option>
    <option value="flagstaff, az">Flagstaff, AZ</option>
    <option value="winona, az">Winona</option>
    <option value="kingman, az">Kingman</option>
    <option value="barstow, ca">Barstow</option>
    <option value="san bernardino, ca">San Bernardino</option>
    <option value="los angeles, ca">Los Angeles</option>
  </select>
</div>
<div id="right-panel"></div>
<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer src="https://maps.googleapis.com/maps/api/js?sensor=false&callback=initMap">
</script>

相关内容

  • 没有找到相关文章

最新更新


热门标签：

javascript python java c# php android html jquery c++ css ios sql mysql arrays asp.net json python-3.x ruby-on-rails .net sql-server django objective-c excel regex ruby linux ajax iphone xml vba spring asp.net-mvc database wordpress string postgresql wpf windows xcode bash git oracle list vb.net multithreading eclipse algorithm macos powershell visual-studio image forms numpy scala function api selenium