0.7.0 • Published 10 years ago
chained v0.7.0
Chained Browser Demo
This demo shows a form validation DSL implemented with Chained in Coffeescript:
form '#form', ( check ) ->
field '#fname', (f) ->
check(f.value).isNotNull().isLengthAtLeast(of: 2).show(f)
field '#lname', (f) ->
check(f.value).isNotNull().isLengthAtLeast(of: 2).show(f)
field '#uname', (f) -> check(f.value).isNotNull().userNameShouldNotExist(msg: 'User already exists').show(f)
field '#password1', (f) ->
check(f.value).isNotNull().isLengthAtLeast(of: 4).show(f)
field '#password2', (f) ->
check(f.value).isNotNull().shouldMatchElement(element: '#password1', msg: "passwords should match").show(f)
form
andfield
functions setupfocusout
callbacks with chained, deferred objects.check
is an alias forchained._
.The method
show
renders popup error messages whenever one of the promise associated with a predicate-chain fails.The method
userNameShouldNotExist
is based on an Ajaxget
and, as such, is promise based. Chained allows to use the result in the next predicate as if it were synchronous. The users file at the moment contains only the userzack
.