github.com/jonasnick/go-ethereum@v0.7.12-0.20150216215225-22176f05d387/cmd/mist/assets/examples/balance.html (about)

     1  <!doctype>
     2  <html>
     3  
     4  <head>
     5  <script src="../ext/bignumber.min.js"></script>
     6  <script src="../ext/ethereum.js/dist/ethereum.js"></script>
     7  <script type="text/javascript">
     8     
     9      var web3 = require('web3');
    10      web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8080'));
    11  
    12      function watchBalance() {
    13          var coinbase = web3.eth.coinbase;
    14          var originalBalance = 0;
    15  
    16          var balance = web3.eth.balanceAt(coinbase);
    17          var originalBalance = web3.toDecimal(balance);
    18          document.getElementById('original').innerText = 'original balance: ' + originalBalance + '    watching...';
    19  
    20          web3.eth.watch({altered: coinbase}).changed(function() {
    21              balance = web3.eth.balanceAt(coinbase)
    22              var currentBalance = web3.toDecimal(balance);
    23              document.getElementById("current").innerText = 'current: ' + currentBalance;
    24              document.getElementById("diff").innerText = 'diff:    ' + (currentBalance - originalBalance);
    25          });
    26      }
    27  
    28  </script>
    29  </head>
    30  <body>
    31      <h1>coinbase balance</h1>
    32      <button type="button" onClick="watchBalance();">watch balance</button>
    33      <div></div>
    34      <div id="original"></div>
    35      <div id="current"></div>
    36      <div id="diff"></div>
    37  </body>
    38  </html>
    39  
    40