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bacon vs. backbone vs. react (just seeing how bacon's paradigm compares with other approaches)
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var RegisterForm = Backbone.View.extend({ | |
ui: { | |
username: '.username', | |
fullname: '.fullname', | |
register: '.register-btn', | |
loader: '.loader', | |
feedback: '.feedback' | |
} | |
events: { | |
'input username, fullname': 'onInput', | |
'click register': 'onRegisterClick' | |
}, | |
onInput: function() { | |
_.throttle(_.bind(function() { | |
this.ui.register.prop('disabled', | |
!this.ui.username.val() || !this.ui.fullname.val()); | |
this.checkAvailability(this.ui.username.val()); | |
}, this), 100); | |
}, | |
checkAvailability: function(username) { | |
this.ui.loader.show(); | |
this.ui.registerButton.hide(); | |
$.get('/availability', { username: username }) | |
.done(_.bind(function(result) { | |
this.ui.loader.hide(); | |
this.ui.registerButton.show(); | |
this.showAvailability(result); | |
this.applyAvailability(result); | |
}, this)); | |
}, | |
showAvailability: function(result) { | |
this.ui.feedback | |
.html(result ? 'Available' : 'Not available') | |
.toggle(result); | |
}, | |
applyAvailability: function(result) { | |
this.ui.register.prop('disabled', result ? false : true); | |
}, | |
onRegisterClick: function() { | |
this.ui.register.prop('disabled', true); | |
this.ui.loader.show(); | |
$.post('/register', { | |
username: this.ui.username.val(), | |
fullname: this.ui.fullname.val() | |
}) | |
.done(_.bind(function() { | |
this.ui.registerButton.prop('disabled', false); | |
this.ui.loader.hide(); | |
this.ui.feedback.show(); | |
}, this)); | |
return false; | |
} | |
}); |
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function nonEmpty(x) { return x.length > 0 } | |
function setVisibility(element, visible) { | |
element.toggle(visible) | |
} | |
function setEnabled(element, enabled) { | |
element.attr("disabled", !enabled) | |
} | |
$(function() { | |
$(".ajax").hide() | |
registerButton = $("#register button") | |
unavailabilityLabel = $("#username-unavailable") | |
usernameAjaxIndicator = $("#username .ajax") | |
registerAjaxIndicator = $("#register .ajax") | |
// Inputs | |
username = Bacon.UI.textFieldValue($("#username input")) | |
fullname = Bacon.UI.textFieldValue($("#fullname input")) | |
// Streams / Properties | |
usernameEntered = username.map(nonEmpty) | |
fullnameEntered = fullname.map(nonEmpty) | |
availabilityRequest = username.changes().map(function(user) { | |
var restUrl = ({ url: "/usernameavailable/" + user }) | |
return restUrl | |
}) | |
availabilityResponse = availabilityRequest.ajax() | |
usernameAvailable = availabilityResponse.toProperty(true) | |
buttonEnabled = usernameEntered.and(fullnameEntered).and(usernameAvailable) | |
// Side-effects | |
buttonEnabled.assign(setEnabled, registerButton) | |
usernameAvailable.not().assign(setVisibility, unavailabilityLabel) | |
}) |
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var RegisterForm = React.createClass({ | |
getInitialState: function() { | |
return { | |
username: '', | |
fullname: '' | |
} | |
}, | |
checkAvailability: function() { | |
this.setState({ isFetching: true }); | |
$.get('/availability', { username: this.state.username }) | |
.done(function(result) { | |
this.setState({ | |
isAvailable: result.isAvailable, | |
isFetching: false | |
}); | |
}.bind(this)); | |
}, | |
componentWillMount: function() { | |
this.checkAvailability = _.debounce(this.checkAvailability, 100); | |
}, | |
handleSubmit: function(e) { | |
e.preventDefault(); | |
$.ajax({ | |
url: this.props.url, | |
type: 'POST', | |
data: { | |
username: this.state.username, | |
fullname: this.state.fullname | |
}, | |
success: _.bind(function(data) { | |
this.setState({ isAvailable: data.isAvailable }); | |
}, this) | |
}); | |
}, | |
onUsernameChange: function(event) { | |
this.setState({ username: event.target.value }); | |
}, | |
onFullnameChange: function(event) { | |
this.setState({ fullname: event.target.value }); | |
}, | |
getUsernameStatus: function() { | |
return `Username ${ this.state.username } is | |
${ this.state.isAvailable ? 'available' : 'not available' }`; | |
}, | |
render: function() { | |
return ( | |
<form onSubmit={this.handleSubmit}> | |
<p>{this.getUsernameStatus()}</p> | |
<input value={this.state.username} onChange={this.onUsernameChange} /> | |
<input value={this.state.fullname} onChange={this.onFullnameChange} /> | |
<input type="submit" value="Register" | |
disabled={!this.state.isAvailable || this.state.isFetching} /> | |
<p>{this.state.isFetching ? 'Fetching' : ''}</p> | |
</form> | |
); | |
} | |
}); | |
ReactDOM.render( | |
<RegisterForm url="/register" />, | |
document.getElementById('container') | |
); |
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