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attr = @load(expression,after='cmd') : load the expression to attr after the 'command' cmd

attr = @save(expression,before='cmd') : save the attr to expression to attr before the command 'cmd'

and after & before are all evaluated after the validation and command execution.

we usually use before='cmd' on @save and use @load after='cmd' or both without condition (how ever you could still use @save after='cmd' or @load before='cmd' just by case)

please read (document)[http://books.zkoss.org/wiki/ZKDeveloper%27sReference/MVVM/DataBinding/CommandBinding]

attr = @load(expression,after='cmd') : load the expression to attr after the 'command' cmd

attr = @save(expression,before='cmd') : save the attr to expression to attr before the command 'cmd'

and after & before are all evaluated after the validation and command execution.

we usually use before='cmd' on @save and use @load after='cmd' or both without condition (how ever you could still use @save after='cmd' or @load before='cmd' just by case)

please read (document)[http://books.zkoss.org/wiki/ZKDeveloper%27sReference/MVVM/DataBinding/CommandBindingdocument]

attr = @load(expression,after='cmd') : load the expression to attr after the 'command' cmdcommand 'cmd'

attr = @save(expression,before='cmd') : save the attr to expression to attr before the command 'cmd'

and after & before are all evaluated after the validation and command execution.

we usually use before='cmd' on @save and use @load after='cmd' or both without condition (how ever you could still use @save after='cmd' or @load before='cmd' just by case)

please read document