AngularJS v1.2.x $digest() 无限循环指令隔离作用域对象参数 [英] AngularJS v1.2.x $digest() infinite loop Directive isolated scope object param
本文介绍了AngularJS v1.2.x $digest() 无限循环指令隔离作用域对象参数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
问题的简化版,查看web开发控制台:http://plnkr.co/edit/3wKmWz?p=预览
Simplified version of problem, view web dev console: http://plnkr.co/edit/3wKmWz?p=preview
Uncaught Error: [$rootScope:infdig] 10 $digest() iterations reached. Aborting!
Watchers fired in the last 5 iterations:
那么为什么将对象传递给具有隔离作用域的指令会导致 $digest() 无限循环?
So why does passing an object into a directive with an isolated scope cause an infinite $digest() loop?
// controller
// AngularJS 1.2.x infinite digest caused when returning object into directive
$scope.ctrlObjReturnFn = function() {
return {test:true};
}
// view
<div test-dir breaking-object="ctrlObjReturnFn()"></div
// directive
app.directive('testDir', function() {
return {
scope: { breakingObject: '=' },
link: function(scope, element, attrs) {
element.html('printed obj: ' + scope.breakingObject.toString());
}
}
});
推荐答案
这是因为您将函数作为 2 路绑定传递到指令中,这不是您应该做的,要么使用2路绑定:
This is because you're passing in a function as a 2 way binding into the directive, which is not what you should be doing, either pass an object using 2 way binding:
scope: { breakingObject: '=' },
<div test-dir breaking-object="ctrlObjReturnFn"></div>
$scope.ctrlObjReturnFn = {test:true};
或使用单向绑定的函数:
or a function using 1 way binding:
scope: { breakingObject: '&' },
<div test-dir breaking-object="ctrlObjReturnFn()"></div>
$scope.ctrlObjReturnFn = function() {
return {test:true};
}
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