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angular.js - How to use angular to implement three-level linkage of an array

The array looks like this

I want to use angular to realize the three-level linkage of provinces and municipalities. The current code looks like this, but the result cannot be realized. Can't get city

phpcn_u1582phpcn_u15822761 days ago759

reply all(2)I'll reply

  • phpcn_u1582

    phpcn_u15822017-06-05 11:11:42

    It’s useless for you to write like this

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  • ringa_lee

    ringa_lee2017-06-05 11:11:42

    I asked a very stupid question = =Using ng-change to change the state according to the previous level can achieve three-level linkage

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