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Leaflet - I cannot seem to get the basic examples working
(1 answer)
Closed 10 months ago.
I am using leaflet with openstreetmap. However, I cannot get the map to render correctly.
Find below my minimum viable example.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Land</title>
<link
href="https://unpkg.com/leaflet#1.4.0/dist/leaflet.css"
rel="stylesheet"
/>
</head>
<body>
<div id="Karte" style="height: 100%; width: 100%"></div>
</body>
<script src="http://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://unpkg.com/leaflet#1.4.0/dist/leaflet.js"></script>
<script>
var Karte = L.map("Karte").setView([43.00, -79.00], 10);
L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {
attribution:
'Kartendaten © OpenStreetMap',
useCache: true,
}).addTo(Karte);
</script>
</html>
Any suggestions what I am doing wrong?
The error comme from the style you add to your Kart. 100% of 0 will result to 0px. You should put a fixed height or width as the documentation said.
Make sure the map container has a defined height, for example by setting it in CSS
You can for example use #Karte { height: 180px; }
#Karte { height: 180px; }
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Land</title>
<link
href="https://unpkg.com/leaflet#1.4.0/dist/leaflet.css"
rel="stylesheet"
/>
</head>
<body>
<div id="Karte"></div>
</body>
<script src="http://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://unpkg.com/leaflet#1.4.0/dist/leaflet.js"></script>
<script>
var Karte = L.map("Karte").setView([43.00, -79.00], 10);
L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {
attribution:
'Kartendaten © OpenStreetMap',
useCache: true,
}).addTo(Karte);
</script>
</html>
Related
I am a beginner in javascript , now I'm learning a BOM but when I used method moveTo()
it can't work I need moveto(0,200) childPage after open by button , please help me and explain me where is the problem in it ?
parent.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Bom</title>
</head>
<body>
<input type="button" value="openChild" onclick="openChild()" />
<input type="button" value="moveChild" onclick="moveToo()" />
<script src="js/parent.js"></script>
</body>
</html>
parent.js
function openChild() {
res = open("./child.html", "", "width=200 , height=200");
}
function moveToo() {
moveTo(0, 200);
}
child.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<style>
body {
background: yellow;
}
h1 {
text-align: center;
}
</style>
<title>child</title>
</head>
<body>
<h1>welcome in child</h1>
</body>
</html>
I have an HTML file linked to a script. A button defined in the HTML has an onclick function 'incrementLabel()' but the function in the script throws the warning:
'incrementLabel' is declared but its value is never read.
function incrementLabel() {
var text = document.getElementById("testLabel").textContent;
document.getElementById("testLabel").innerText = (parseInt(text) + 1);
}
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="styles.css">
<script src="js/Main.js"></script>
<title>Test Web App</title>
</head>
<body>
<button onclick="incrementLabel()">Test</button>
<label id="testLabel">0</label>
</body>
</html>
I can't find any solutions to the problem other than writing the function in a in HTML. Any help would be much appreciated.
Thanks!
<!DOCTYPE HTML>
<script>
function incrementLabel() {
var text = document.getElementById("testLabel").textContent;
document.getElementById("testLabel").innerText = (parseInt(text) + 1);
}
</script>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="styles.css">
<script src="js/Main.js"></script>
<title>Test Web App</title>
</head>
<body>
<button onclick="incrementLabel()">Test</button>
<label id="testLabel">0</label>
</body>
</html>
This works perfectly fine. Check if you are importing your JS script correctly.
You can put the javascript code into a before the closing tag .
HTML:
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="styles.css">
<script src="js/Main.js"></script>
<title>Test Web App</title>
</head>
<body>
<button onclick="incrementLabel()">Test</button>
<label id="testLabel">0</label>
<script>
function incrementLabel() {
var text = document.getElementById("testLabel").textContent;
document.getElementById("testLabel").innerText = (parseInt(text) + 1);
}
</script>
</body>
Some of online tools like https://playcode.io don't recognise your code but I have tested in vscode and works fine.
Maybe have to use other online tool or can test if you have imported the code well with a console.log("Works fine") into your javascript file.
Sorry for my english.
Hi I am trying to add a start button via jquery to appear when the page loads. However, the button is not loading.
Here is my code:
$(window).on('load', function() {
const startPage = $("<button id='start'>Go</button>");
$('main').append(startPage);
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Quiz</title>
<link href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css" rel="stylesheet" type="text/css" />
<link href="app.css" rel="stylesheet" type="text/css" />
</head>
<body>
<header>
<h1>Objective London Quiz</h1>
</header>
<main class="questions"></main>
<script src="https://code.jquery.com/jquery-3.4.1.slim.js" crossorigin="anonymous"></script>
<script src="app.js"></script>
</body>
</html>
$(function(){
$('#alias').keyup(function(){
$('#youtuber').html($('#alias').val());
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="width=device-width">
<title>Julius extension</title>
<script src="jquery.min.js"></script>
<script src="popup.js"></script>
<style>
body{
width: 300px;
}
</style>
</head>
<body>
<h3>Find your YouTuber: <span id="youtuber"></span> </h3>
<input id="alias" placeholder="Search your youtuber"/>
</body>
</html>
I am trying to code a simple chrome extension. Right now I want that everything I write in the search bar of my template gets displayed above, after the "Find your YouTuber:" text.
However, for some reason that is not the case, I get the error message: popup.js:1 (anonymous function), whilst running the extension.
popuph.html :
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="width=device-width">
<title>Julius extension</title>
<script src="jquery.min.js"></script>
<script src="popup.js"></script>
<style>
body{
width: 300px;
}
</style>
</head>
<body>
<h3>Find your YouTuber: <span id="youtuber"></span> </h3>
<input id="alias" placeholder="Search your youtuber"/>
</body>
</html>
popup.js:
$(function () {
$('#alias').keyup(function () {
$('#youtuber').html($('#alias').val());
});
});
I created a map with tilemill and then exctracted the tiles with MBUtil.
I'm able to show the tiles properly using Leaflet but i don't succeed using mapbox.js. I'm attaching the code , what I'm doing wrong??
Any help will be appreciated!
<!DOCTYPE html>
<html>
<head>
<title>Leaflet Quick Start Guide Example</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!--<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.css" />-->
<link href='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.css' rel='stylesheet' />
</head>
<body>
<div id="map" style="width: 1000px; height: 1000px"></div>
<!-- <script src="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.js"></script> -->
<script src='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.js'></script>
<script>
//var tilesUrl = 'http://eccoilmoro.github.io/Mappa-Redditi-IRPEF-2012-/tiles-mappa- redditi-2012/{z}/{x}/{y}.png',
//tilesLayer = new L.TileLayer(tilesUrl);
//map = new L.Map('map');
//map.addLayer(tilesLayer);
//map.setView(new L.LatLng(39.5,-5.0), 6);
var map = L.mapbox.map('map');
tilesLayer = new L.mapbox.TileLayer({ "tilejson": "2.0.0",
"tiles": [ "http://eccoilmoro.github.io/Mappa-Redditi-IRPEF-2012-/tiles-mappa-redditi- 2012/{z}/{x}/{y}.png" ] ,
"attribution": "franco"
});
tilesLayer.addTo(map);
map.setView(new L.LatLng(39.5,-5.0), 6);
</script>
</body>
</html>
You can try this syntax
<!DOCTYPE html>
<html>
<head>
<title>Leaflet Quick Start Guide Example</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.css' rel='stylesheet' />
</head>
<body>
<div id="map" style="width: 1000px; height: 1000px"></div>
<script src='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.js'></script>
<script>
var map = L.mapbox.map('map');
L.tileLayer('http://eccoilmoro.github.io/Mappa-Redditi-IRPEF-2012-/tiles-mappa-redditi-2012/{z}/{x}/{y}.png', {
"attribution": "franco"
}).addTo(map);
map.setView(new L.LatLng(39.5, 9), 6);
</script>
</body>
</html>
Thank you vey much Selim, it works!
I wanted to go a step forward adding interacativity (the map I created with tilemill is interactive) but I cannot see the tooltips! Perhaps I'm getting the wrong syntax again...
<!DOCTYPE html>
<html>
<head>
<title>Leaflet Quick Start Guide Example</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.css' rel='stylesheet' />
</head>
<body>
<div id="map" style="width: 1000px; height: 1000px"></div>
<script src='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.js'></script>
<script>
var map = L.mapbox.map('map');
//L.tileLayer('http://eccoilmoro.github.io/Mappa-Redditi-IRPEF-2012-/tiles-mappa- redditi-2012/{z}/{x}/{y}.png', {"attribution": "franco"}).addTo(map);
L.mapbox.tileLayer({ "tilejson": "2.0.0",
"tiles": [ "http://eccoilmoro.github.io/Mappa-Redditi-IRPEF-2012-/tiles-mappa-redditi-2012/{z}/{x}/{y}.png" ] }).addTo(map);
var myGridLayer = L.mapbox.gridLayer({ "tilejson": "2.0.0",
"tiles": [ "http://eccoilmoro.github.io/Mappa-Redditi-IRPEF-2012-/tiles-mappa-redditi-2012/{z}/{x}/{y}.grid.json" ] }).addTo(map);
var myGridControl = L.mapbox.gridControl(myGridLayer).addTo(map);
map.setView(new L.LatLng(39.5, 9), 6);
</script>
</body>
</html>