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feat($compile): '=' binding can now be optional #1889
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If you bind using '=' to a non-existant parent property, the compiler will throw a NON_ASSIGNABLE_MODEL_EXPRESSION exception, which is right because the model doesn't exist. This enhancement allow to specify that a binding is optional so it won't complain if the parent property is not defined. In order to mantain backward compability, the new behaviour must be specified using '=?' instead of '='. The local property will be undefined is these cases. Closes angular#909 Closes angular#1435
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By the way, I already signed the CLA |
PR Checklist (Minor Feature)
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landed as ac899d0 |
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If you bind using
'='to a non-existant parent property, the compiler will throw aNON_ASSIGNABLE_MODEL_EXPRESSIONexception, which is right because the model doesn't exist.This enhancement allow to specify that a binding is optional so it won't complain if the parent property is not defined. In order to keep backward compability, the new behaviour must be specified using
'=?'instead of'='. The local property will be undefined is these cases.Closes #909
Closes #1435