在Aurelia中动态添加验证

Question

Is there a way to add Validation to a property on my VM "dynamically" (ie sometime after I register the initial rules on the VM)?

Currently, I'm registering the rules in the constructor of the VM, then a little while later, after the user has entered a bunch of data, I need to show a new field (using if.bind) and want to add validation depending on the result of a web api call..

Wondering if there's an API for this that I've missed?

Answer 1

You can achieve it without dynamically adding rule but instead you can use satisfiesRule and when , see it here in section Conditional Validation. satisfiesRule will only evaluated if the property that attached to it is already pass. when will only evaluated the rule if the condition is true.

Additional link. If you're using bootstrap, you can find this useful .