javascript - Why is it printed twice?

Question

<button ng-disabled="test()">按钮</button>
angular.module('myApp', []).

controller('c',function($scope){
    $scope.test=function(){
        console.log('为什么打印两次');
        return false;
    }
})

Answer 1

I reproduced your code, see: JSFiddle-Problem Reproduction

Angular’s ​​dirty value check, for the specific reason, see: Understanding the Angular data binding process
I won’t go into details! ! !