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index.html
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<!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">
<script src="./node_modules/web3/dist/web3.min.js"></script>
</head>
<body>
<div class="container">
<h1>Coursetro Instructor</h1>
<h2 id="instructor"></h2>
<img src="https://loading.io/spinners/double-ring/lg.double-ring-spinning.gif" id="loader">
<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>
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([
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"name": "name",
"type": "string"
},
{
"indexed": false,
"name": "age",
"type": "uint256"
}
],
"name": "Instructor",
"type": "event"
},
{
"constant": false,
"inputs": [
{
"name": "_fName",
"type": "string"
},
{
"name": "_age",
"type": "uint256"
}
],
"name": "setInstructor",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "constructor"
},
{
"constant": true,
"inputs": [],
"name": "getInstructor",
"outputs": [
{
"name": "",
"type": "string"
},
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
]);
var Coursetro = CoursetroContract.at('YOUR CONTRACT ADDRESS HERE');
//console.log(Coursetro);
//UI doesnt gets loaded after user sets instructor
// Coursetro.getInstructor(function(error, result){
// if(!error)
// {
// $("#instructor").html(result[0]+' ('+result[1]+' years old)');
// console.log(result);
// }
// else
// console.error(error);
// });
//UI gets loaded in real time
var instructorEvent=Coursetro.Instructor();
instructorEvent.watch(function(error, result){
if (!error)
{
$("#loader").hide();
$("#instructor").html(result.args.name + ' (' + result.args.age + ' years old)');
} else {
$("#loader").hide();
console.log(error);
}
});
$("#button").click(function() {
Coursetro.setInstructor($("#name").val(), $("#age").val());
$("#loader").show();
});
</script>
</body>
</html>