Screenshot of the issues:
Web3.min.js path in my system directory!
Web3.min.js is loaded from folder in my browser
Copy of the web3.min.js in the same folder where index.html file is present.
Code added
info of the node!
I am facing following two issues:
Failed to load resource: web3.min.js:1 net::ERR_CONNECTION_REFUSED
ERROR: Couldn't connect to node http://localhost:8545.
My Index.html file is
<!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>Document</title>
<link rel="stylesheet" type="text/css" href="main.css">
</head>
<body>
<div class="container">
<h1>Coursetro Instructor</h1>
<h2 id="instructor"></h2>
<label for="name" class="col-lg-2 control-label">Instructor Name</label>
<input id="name" type="text">
<label for="name" class="col-lg-2 control-label">Instructor Age</label>
<input id="age" type="text">
<button id="button">Update Instructor</button>
</div>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script>
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
// set the provider you want from Web3.providers
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
}
web3.eth.defaultAccount = web3.eth.accounts[0];
var CoursetroContract = web3.eth.contract([
{
"constant": false,
"inputs": [
{
"name": "_fName",
"type": "string"
},
{
"name": "_age",
"type": "uint256"
}
],
"name": "setInstructor",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "getInstructor",
"outputs": [
{
"name": "",
"type": "string"
},
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
]);
var Coursetro=CoursetroContract.at('0x95712aa4ff464e56f76af55da6239a368c459ed4');
console.log(Coursetro);
</script>
</body>
</html>
If you are connecting to a local node:
You have included jquery cdn, similarly include a web3 from the link web3_cdn.
You can download one file from the link and connect the file in your webapp by
<script type="text/javascript" src="web3.min.js"></script>
And make sure when you run the app your metamask is disabled. Metamask injects a web3 object right into your application.
For reference check the other answers link
i have this problem and i solve it .
the solution :
you must create index.html and main.css in folder project, not in node_modules folder.
Related
Hi I want to generate a heatmap from a .geojson file with this plugin
How can I manage that? I'm very new to json, leaflet and web development.
The geoJSON file I have looks something like this (with more points ofc):
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {
"name": "testmarker",
"description": "This is a test description"
},
"geometry": {
"type": "Point",
"coordinates": [
-33.134766,
-60.326948
]
}
},
{
"type": "Feature",
"properties": {
"name": "testmarker2"
},
"geometry": {
"type": "Point",
"coordinates": [
-41.220703,
-62.552857
]
}
}
]
}
And here is what my index.html looks like right now.
<!DOCTYPE html>
<html = style="height: 100%;">
<head>
<title>Test Map</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="scripts/leaflet.css">
<script src="scripts/leaflet.js"></script>
<script src="scripts/leaflet.ajax.min.js"></script>
<script src="scripts/leaflet-heat.js"></script>
</head>
<body style="height: 100%;margin: 0;">
<div id="map" style="width: 100%; height: 100%; background: #000000;"></div>
<!-- Workaround for 1px lines appearing in some browsers due to fractional transforms
and resulting anti-aliasing.-->
<style>
.leaflet-tile-container img {
width: 256.5px !important;
height: 256.5px !important;
}
</style>
<script type="text/javascript">
// Creating the Map
var map = L.map('map').setView([58.602611, 50.350342], 4);
L.tileLayer('maps/mymap/{z}/{x}/{y}.png', {
continuousWorld: false,
noWrap: true,
minZoom: 2,
maxZoom: 6,
zoomControl: false,
minNativeZoom: 2,
maxNativeZoom: 6,
updateInterval: 200,
}).addTo(map);
// Remove old zoomControl and add new one in order to move it to bottomright
map.zoomControl.remove();
L.control.zoom({
position: 'bottomright'
}).addTo(map);
// Binds tooltip on all markers and also a popup on click if the markers has a description
function oef(feature, layer) {
if (feature.properties && feature.properties.name) {
layer.bindTooltip(feature.properties.name);
}
if (feature.properties && feature.properties.name && feature.properties.description) {
layer.bindPopup("<center><b> " + feature.properties.name + "</center></b><br>" + feature.properties.description);
}
}
var geojsonMarkers = new L.GeoJSON.AJAX(["https://raw.githubusercontent.com/***/test.geojson"],{onEachFeature:oef});
var mapOverlays={
"Test" : geojsonMarkers,
//"Test - Heat Map" : geojsonMarkersHeat,
}
var layerControl = L.control.layers(null, mapOverlays, {position:'topleft'}).addTo(map);
</script>
</body>
</html>
As you can see from above I want the heatmap to be toggleable via the mapOverlays but I don't really know how to proceed.
I am looking to create a web extension in Azure Devops from a React application.
As in seen in this tutorial, there is a file called my-hub.html, which is the start page of the extension.
By following the steps in the above link, I was able to create a web extension that prints the logged in user, as per my-hub.html, which does document.getElementById("name").innerText = VSS.getWebContext().user.name;.
However, I have written my application in React using Typescript and the start file is App.tsx. Could someone advise how I can instruct the vss-extension.json file to load the extension from App.tsx file?
{
"manifestVersion": 1,
"id": "my-first-extension",
"publisher": "",
"version": "1.0.0",
"name": "My First Extension",
"description": "A sample Visual Studio Services extension",
"public": false,
"categories": ["Azure Repos"],
"targets": [
{
"id": "Microsoft.VisualStudio.Services"
}
],
"contributions": [
{
"id": "my-hub",
"type": "ms.vss-web.hub",
"targets": [
"ms.vss-code-web.code-hub-group"
],
"properties": {
"name": "My Hub",
"uri": "my-hub.html"
}
}
],
"files": [
{
"path": "my-hub.html",
"addressable": true
},
{
"path": "node_modules/vss-web-extension-sdk/lib",
"addressable": true,
"packagePath": "lib"
}
]
}
Would I need to convert the React application to an html page?
you can deploy the React App first, then add the app/website link in html file. Something like this :
<!DOCTYPE html>
<html xmlns="https://www.w3.org/1999/xhtml">;
<head>
<script src="lib/VSS.SDK.min.js"></script>
<style>
body {
background-color: rgb(100, 100, 100);
color: white;
margin: 10px;
font-family: "Segoe UI VSS (Regular)","-apple-system",BlinkMacSystemFont,"Segoe UI",sans-serif;
}
</style>
<script type="text/javascript">
VSS.init();
VSS.ready(function() {
document.getElementById("name").innerText = VSS.getWebContext().user.name;
});
</script>
</head>
<body>
<h1>Hello, <span id="name"></span></h1>
<p>Hello. This is a link to React App?<br />
Just click to navigate to it</p>
</body>
</html>
Please reference this example if you want to integrate the React app directly with the extension.
I am starting using Vega and I am now trying to stream my data to nicely refresh my graph. I followed this doc (https://vega.github.io/vega-lite/tutorials/streaming.html) with no success so far. The examples I found have values in arrays and mine are in a JSON file which is refreshed on a regular basis. I ended up with this code which properly shows my graph as I want but it does not refresh my data.
<html>
<head>
<title>A title</title>
<meta charset="utf-8" />
<script src="https://cdn.jsdelivr.net/npm/vega#5.8.1"></script>
<script src="https://cdn.jsdelivr.net/npm/vega-lite#4.0.0-beta.12"></script>
<script src="https://cdn.jsdelivr.net/npm/vega-embed#6.1.0"></script>
<style media="screen">
/* Add space between Vega-Embed links */
.vega-actions a {
margin-right: 5px;
}
</style>
</head>
<body>
<head>
<meta charset="utf-8">
<script src="https://cdn.jsdelivr.net/npm/vega#5"></script>
<script src="https://cdn.jsdelivr.net/npm/vega-embed#5"></script>
</head>
<body>
<div id="vis"></div>
<script>
var vlSpec = {
data: {"url": "http://localhost:8123/d.json", "name":"table"},
mark: "bar",
"width": 1240,
"encoding": {
"y": {"field": "task", "type": "ordinal", "sort":"x2"},
"x": {"field": "start", "type": "temporal", "aggregate":"sum"},
"x2": {"field": "end", "type": "temporal"},
"color": {"field": "status", "type": "nominal"}
}
};
// Embed visualization and save view as window.view:
vegaEmbed('#vis', vlSpec).then(function(res) {
window.setInterval(function() {
var changeSet = vega
.changeset()
.insert()
res.view.change('table', changeSet).run();
}, 1000);
});
</script>
</body>
</html>
My issue seems to be the insert() where in the example of the doc they insert the result of a function to generate data and I should insert here my JSON file -- I tried different variations with fetch but with no success.
Any help would be appreciated.
Thanks
Let me answer my own question as I figured it out.
First I used jquery:
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
I removed the url tag not to load the JSON file at first:
"data": {"name":'table'},
And the VEGA streaming data from my JSON file:
vegaEmbed('#vis', vlSpec).then(function(res) {
var newdata ;
window.setInterval(function() {
jQuery.getJSON("http://localhost:8123/d.json", function(data) {
newdata = data;
})
var changeSet = vega
.changeset()
.remove(vega.truthy)
.insert(newdata)
console.log (newdata)
res.view.change('table', changeSet).run();
}, 1000);
});
It works like a charm !
I have this markup for Dentist https://schema.org/Dentist
<div itemscope itemtype="http://schema.org/Dentist">
// address is ok
<span itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
<span itemprop="streetAddress">asdfd sf412</span>
<span itemprop="postalCode">12345</span>
<span itemprop="addressLocality">sadfsdf</span>
</span>
// this fails
<span itemprop="logo" itemscope itemtype="http://schema.org/ImageObject">
<meta itemprop="url" content="logo.gif'; ?>" />
</span>
</div>
When trying to test code for itemprop="logo" https://schema.org/logo
Google testing gives me error: "A value for the url field is required."
What am I missing?
I don't want logo to be visible on page, thats why I have put it as meta.
The error in Google’s SDTT is about the Dentist item, not about the ImageObject item. You can see this from the nesting level, the url row is on the same level as logo and address.
So adding a url property to the Dentist item would get rid of the error.
<div itemscope itemtype="http://schema.org/Dentist">
<span itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
<span itemprop="streetAddress">asdfd sf412</span>
<span itemprop="postalCode">12345</span>
<span itemprop="addressLocality">sadfsdf</span>
</span>
<span itemprop="logo" itemscope itemtype="http://schema.org/ImageObject">
<link itemprop="url" href="logo.gif" />
</span>
<link itemprop="url" href="http://example.com/" />
</div>
I changed the meta to link, because HTML5 and Microdata require that you use link (instead of meta) if the value is a URI.
Just in case if you are looking for a JSON-LD format, look over the below code and give it a shot.
"publisher": {
"#type": "Organization",
"name": "Lokaci",
"url": "https://lokaci.com",
"logo": {
"#type": "ImageObject",
"url": "https://res.cloudinary.com/lokaci/image/upload/v1580448186/logo/lokaci_logo_black-corp-comp_nzkooj.png"
}
},
Here is the full code if you wanna have a look, the schema micro-data was about a news article.
------------------full JSON-LD format below ----------------
{
"#context": "https://schema.org",
"#type": "NewsArticle",
"url": "https://lokaci.com/news/Diwali-Countdown-Offer-A-Brothers-Gift",
"publisher": {
"#type": "Organization",
"name": "Lokaci",
"url": "https://lokaci.com",
"logo": {
"#type": "ImageObject",
"url": "https://res.cloudinary.com/lokaci/image/upload/v1580448186/logo/lokaci_logo_black-corp-comp_nzkooj.png"
}
},
"dateline": "Laxminagar Delhi, 26 October 2019",
"headline": "Diwali Countdown Offer: A Brother’s Gift",
"mainEntityOfPage": "https://lokaci.com/newsroom",
"author": {
"#type": "Organization",
"name": "Lokaci",
"logo": "https://res.cloudinary.com/lokaci/image/upload/v1580448186/logo/lokaci_logo_black-corp-comp_nzkooj.png"
},
"image": "https://res.cloudinary.com/lokaci/image/upload/v1575284148/Newsroom/A-One-Salon-Lokaci-wins-Oppo-phone_dfvzdl.jpg",
"datePublished": " 26 October 2019",
"dateModified": " 26 October 2019",
"wordCount": 165,
"keywords": "Lokaci, News"
}
My question refers specifically to http://api.jquery.com/event.target/#example-1
If you use a span in the <li> or other tag to change the style such as <b> as I have done here, that part of the element won't trigger the JQuery function to toggle it's children. How might one go about making this work?
HTML:
<ul>
<li><b>This doesn't work,</b> this does
<ul>
<li>sub item 1-a</li>
<li>sub item 1-b</li>
</ul>
</li>
<li>item 2
<ul>
<li>sub item 2-a</li>
<li>sub item 2-b</li>
</ul>
</li>
</ul>
JavaScript:
function handler(event) {
var $target = $(event.target);
if( $target.is("li") ) {
$target.children("ul").toggle();
}
}
$("ul").click(handler).find("ul").hide();
To keep using your current form, I'd suggest using closest():
function handler(event) {
$(event.target).closest('li').children("ul").toggle();
}
$("ul").click(handler).find("ul").hide();
JS Fiddle demo.
Though for my own use I'd prefer:
$('li').on('click', function(e){
e.stopPropagation();
$(this).find('ul').toggle();
});
JS Fiddle demo.
References:
closest().
on().
A complete example of e.target children and closest with datatable and external data.
HtML
<!DOCTYPE html>
<html lang="en">
<head>
<title>example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="css/style.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.16/css/jquery.dataTables.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script type="text/javascript" charset="utf8" src="js/jquery.dataTables.js"></script>
<script src="js/script.js"></script>
</head>
<body>
<div class="col-md-12 sectionone">
<div id="coxtable">
<div class="col-md-3 outerblock" id="section1"><div class="blocks section1"><h6 class="span1">Section1</h6><span class="span1a">Section1a</span></div></div>
<div class="col-md-3 outerblock" id="section2"><div class="blocks section2"><h6 class="span1">Section2</h6><span class="span1a">Section2a</span></div></div>
<div class="col-md-3 outerblock" id="section3"><div class="blocks section3"><h6 class="span1">Section3</h6><span class="span1a">Section3a</span></div></div>
<div class="col-md-3 outerblock" id="section4"><div class="blocks section4"><h6 class="span1">Section4</h6><span class="span1a">Section4a</span></div></div>
</div>
</div>
<div class="sectiontwo col-md-12">
<table id="example">
<thead>
<tr>
<th>name</th>
<th>stargazerscount</th>
<th>forkscount</th>
<th>description</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
</div>
<div id="testmodal" class="modal fade" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="modalbtn btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</body>
</html>
Javascript
$(document).ready( function () {
var tables=$('#example').DataTable( {
"ajax": {
"type" : "POST",
"url": "http://localhost/example/json/members.json",
"dataSrc": function (json) {
var return_data = new Array();
for(var i=0;i< json.length; i++){
return_data.push({
'name': json[i].name,
'stargazerscount' : json[i].stargazerscount,
'forkscount' : json[i].forkscount,
'description' : json[i].description
})
$('.overlay').hide();
$(".loader").hide();
}
return return_data;
}
},
"columns": [
{ "data": "name" },
{ "data": "stargazerscount" },
{ "data": "forkscount" },
{ "data": "description" }
]
});
/*onclick filter*/
$(".outerblock").click(function(e){
$("#testmodal").modal('show');
var item=$(e.target).closest('span').text();
$( ".modalbtn" ).one( "click", function(event) {
$(this).off(event);
alert(item)
var tables=$('#example').DataTable( {
"destroy":true,
"ajax": {
"type" : "POST",
"url": "http://localhost/example/json/members.json?id="+item,
"dataSrc": function (json) {
var return_data = new Array();
for(var i=0;i< json.length; i++){
return_data.push({
'name': json[i].name,
'stargazerscount' : json[i].stargazerscount,
'forkscount' : json[i].forkscount,
'description' : json[i].description
})
$('.overlay').hide();
$(".loader").hide();
}
return return_data;
}
},
"columns": [
{ "data": "name" },
{ "data": "stargazerscount" },
{ "data": "forkscount" },
{ "data": "description" }
]
});
});
});
$("#example").delegate("tbody tr td:first-child", "click", function(e){
var item=$(e.target).text();
//alert(item);
$("#testmodal").modal('show');
$( ".modalbtn" ).one( "click", function(event) {
$(this).off(event);
alert(item);
var tables=$('#example').DataTable( {
"destroy":true,
"ajax": {
"type" : "POST",
"url": "http://localhost/example/json/members.json?id="+item,
"dataSrc": function (json) {
var return_data = new Array();
for(var i=0;i< json.length; i++){
return_data.push({
'name': json[i].name,
'stargazerscount' : json[i].stargazerscount,
'forkscount' : json[i].forkscount,
'description' : json[i].description
})
$('.overlay').hide();
$(".loader").hide();
}
return return_data;
}
},
"columns": [
{ "data": "name" },
{ "data": "stargazerscount" },
{ "data": "forkscount" },
{ "data": "description" }
]
});
});
});
});
json
[{
"name": "mango",
"stargazerscount": 526,
"forkscount": "critical",
"description": "fruits"
},
{
"name": "mobiles",
"stargazerscount": 526,
"forkscount": "major",
"description": "electronics"
},
{
"name": "mobiles",
"stargazerscount": 526,
"forkscount": "major",
"description": "electronics"
}
]