8.01 - event listener example.js

JS设计模式源代码

addEvent(element, 'click', getBeerById);
function getBeerById(e) {
  var id = this.id;
  asyncRequest('GET', 'beer.uri?id=' + id, function(resp) {
    // Callback response.
    console.log('Requested Beer: ' + resp.responseText);
  });
}

function getBeerById(id, callback) {
  // Make request for beer by ID, then return the beer data.
  asyncRequest('GET', 'beer.uri?id=' + id, function(resp) {
    // callback response
    callback(resp.responseText);
  });
}

addEvent(element, 'click', getBeerByIdBridge);
function getBeerByIdBridge (e) {
  getBeerById(this.id, function(beer) {
    console.log('Requested Beer: '+beer);
  });
}