How to post a javascript function into a html input field

Question

I need to have longitude and latitude inside the input form, but I cannot figure out how to do it, I have tried a few examples, as seen in the below code (doesnt work).

<script>
function data(){

var x = document.getElementById("demo");

function getLocation() {
  if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
  }
}

function showPosition(position) {
  x.innerHTML = 
  "Latitude: " + position.coords.latitude + 
   "<br>Longitude: " + position.coords.longitude;
}
}</script>

<form name="test_form">
  <input id="demo" type="text" value=""> 
</form>
<button onclick="getLocation();">GO</button>

Expected results: Longitude and Latitude to be inside the input box, or if possible, longitude in one input box, latitude in anoter

Welcome to StackOverflow! This is a good question! well done... — blurfus
– blurfus, Commented May 1, 2019 at 17:42

blurfus · Accepted Answer · 2019-05-01 17:41:12Z

You need to set the value of the input instead of overriding its HTML.

like

// set the value of the input x.value = "Latitude: " + position.coords.latitude + ...

Updated to include separate boxes for Lat/Lon

See demo below

function showPosition(position) {
  console.log('location obtained');
  console.log(position);

  var lon = document.getElementById("lon");
  var lat = document.getElementById("lat");

  // set the value of the inputs
  lon.value = position.coords.longitude;
  lat.value = position.coords.latitude;
}

function getLocation() {
  console.log('button clicked');

  if (navigator.geolocation) {
    console.log('getting location');
    navigator.geolocation.getCurrentPosition(showPosition);
  }
}

label {
  width: 100px;
  font-weight: bolder;
  display: inline-block;
}

<label>Longitud:</label><input id="lon" type="text" value=""> <br/>
<label>Latitude:</label><input id="lat" type="text" value=""> <br/>
<button onclick="getLocation();">GO</button>

wakajawaka · Accepted Answer · 2019-05-01 17:26:47Z

1

Here you go:

Markup

<input id="lat" type="text" value=""> 
<input id="long" type="text" value=""> 
<button onclick="getLocation();">GO</button>

JS

function getLocation(){
      navigator.geolocation.getCurrentPosition(function(position){
        var coordinates = position.coords;
        document.getElementById('lat').value = coordinates.latitude;
        document.getElementById('long').value = coordinates.longitude;
      });
   }

answered May 1, 2019 at 17:26

wakajawaka

1637 bronze badges

Comments

Kai Lehmann · Accepted Answer · 2019-05-01 17:27:52Z

1

You have to set the x.value = instead of its innerHTML.

answered May 1, 2019 at 17:27

Kai Lehmann

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