AngularJS components $onChanges is getting fired only when assign new val, rather than make a change
0
I have this:
// child component
this.$onChanges = () =>
console.log(this.test);
// parent component
$scope.test =
team: "barcelona"
;
// parent component html
<my-component test="test"></my-component>
// parent component
$timeout(() =>
$scope.test.team = "Real madrid"; // NOT fire the $onChanges!
$scope.test =
team: "Real madrid";
// DOES fire the $onChanges!
, 2000);
As you can see, components $onChanges function is fired only when assigning value, rather than just updating.
What to do with this?
javascript angularjs components onchange
asked Nov 14 '18 at 19:58
RazRaz
297113
add a comment |
0
I have this:
// child component
this.$onChanges = () =>
console.log(this.test);
// parent component
$scope.test =
team: "barcelona"
;
// parent component html
<my-component test="test"></my-component>
// parent component
$timeout(() =>
$scope.test.team = "Real madrid"; // NOT fire the $onChanges!
$scope.test =
team: "Real madrid";
// DOES fire the $onChanges!
, 2000);
As you can see, components $onChanges function is fired only when assigning value, rather than just updating.
What to do with this?
javascript angularjs components onchange
asked Nov 14 '18 at 19:58
RazRaz
297113
On your timeout block you are first updating the team varibale on your test object. Which just updates the value and does not fire any trigger placed on scope. But when you call this creates a new object so change event fires. You should put you change event on onject level to watch the changes on objects, not on the scope level
– Utku Apaydin
Nov 15 '18 at 4:58
Can you answer it with a code please, since I didn't understand you.onject level to watchwhat that means?
– Raz
Nov 15 '18 at 6:08
1
this.test.$onChanges = () =>need to change event on object level not on the scope level (as @UtkuApaydin said)
– Jean-Philippe Bergeron
Nov 15 '18 at 19:58
@Jean-PhilippeBergeron ty :)
– Utku Apaydin
Nov 16 '18 at 7:02
Each attribute I should wrap with this.MYATTR.$onChanges ?
– Raz
Nov 16 '18 at 9:51
add a comment |
0
0
0
I have this:
// child component
this.$onChanges = () =>
console.log(this.test);
// parent component
$scope.test =
team: "barcelona"
;
// parent component html
<my-component test="test"></my-component>
// parent component
$timeout(() =>
$scope.test.team = "Real madrid"; // NOT fire the $onChanges!
$scope.test =
team: "Real madrid";
// DOES fire the $onChanges!
, 2000);
As you can see, components $onChanges function is fired only when assigning value, rather than just updating.
What to do with this?
javascript angularjs components onchange
asked Nov 14 '18 at 19:58
RazRaz
297113
I have this:
// child component
this.$onChanges = () =>
console.log(this.test);
// parent component
$scope.test =
team: "barcelona"
;
// parent component html
<my-component test="test"></my-component>
// parent component
$timeout(() =>
$scope.test.team = "Real madrid"; // NOT fire the $onChanges!
$scope.test =
team: "Real madrid";
// DOES fire the $onChanges!
, 2000);
As you can see, components $onChanges function is fired only when assigning value, rather than just updating.
What to do with this?
javascript angularjs components onchange
javascript angularjs components onchange
asked Nov 14 '18 at 19:58
RazRaz
297113
asked Nov 14 '18 at 19:58
RazRaz
297113
asked Nov 14 '18 at 19:58
RazRaz
297113
asked Nov 14 '18 at 19:58
RazRaz
297113
asked Nov 14 '18 at 19:58
RazRaz
297113
297113
On your timeout block you are first updating the team varibale on your test object. Which just updates the value and does not fire any trigger placed on scope. But when you call this creates a new object so change event fires. You should put you change event on onject level to watch the changes on objects, not on the scope level
– Utku Apaydin
Nov 15 '18 at 4:58
Can you answer it with a code please, since I didn't understand you.onject level to watchwhat that means?
– Raz
Nov 15 '18 at 6:08
1
this.test.$onChanges = () =>need to change event on object level not on the scope level (as @UtkuApaydin said)
– Jean-Philippe Bergeron
Nov 15 '18 at 19:58
@Jean-PhilippeBergeron ty :)
– Utku Apaydin
Nov 16 '18 at 7:02
Each attribute I should wrap with this.MYATTR.$onChanges ?
– Raz
Nov 16 '18 at 9:51
add a comment |
On your timeout block you are first updating the team varibale on your test object. Which just updates the value and does not fire any trigger placed on scope. But when you call this creates a new object so change event fires. You should put you change event on onject level to watch the changes on objects, not on the scope level
– Utku Apaydin
Nov 15 '18 at 4:58
Can you answer it with a code please, since I didn't understand you.onject level to watchwhat that means?
– Raz
Nov 15 '18 at 6:08
1
this.test.$onChanges = () =>need to change event on object level not on the scope level (as @UtkuApaydin said)
– Jean-Philippe Bergeron
Nov 15 '18 at 19:58
@Jean-PhilippeBergeron ty :)
– Utku Apaydin
Nov 16 '18 at 7:02
Each attribute I should wrap with this.MYATTR.$onChanges ?
– Raz
Nov 16 '18 at 9:51
On your timeout block you are first updating the team varibale on your test object. Which just updates the value and does not fire any trigger placed on scope. But when you call this creates a new object so change event fires. You should put you change event on onject level to watch the changes on objects, not on the scope level
– Utku Apaydin
Nov 15 '18 at 4:58
On your timeout block you are first updating the team varibale on your test object. Which just updates the value and does not fire any trigger placed on scope. But when you call this creates a new object so change event fires. You should put you change event on onject level to watch the changes on objects, not on the scope level
– Utku Apaydin
Nov 15 '18 at 4:58
Can you answer it with a code please, since I didn't understand you.
onject level to watch what that means?– Raz
Nov 15 '18 at 6:08
Can you answer it with a code please, since I didn't understand you.
onject level to watch what that means?– Raz
Nov 15 '18 at 6:08
1
1
this.test.$onChanges = () => need to change event on object level not on the scope level (as @UtkuApaydin said)– Jean-Philippe Bergeron
Nov 15 '18 at 19:58
this.test.$onChanges = () => need to change event on object level not on the scope level (as @UtkuApaydin said)– Jean-Philippe Bergeron
Nov 15 '18 at 19:58
@Jean-PhilippeBergeron ty :)
– Utku Apaydin
Nov 16 '18 at 7:02
@Jean-PhilippeBergeron ty :)
– Utku Apaydin
Nov 16 '18 at 7:02
Each attribute I should wrap with this.MYATTR.$onChanges ?
– Raz
Nov 16 '18 at 9:51
Each attribute I should wrap with this.MYATTR.$onChanges ?
– Raz
Nov 16 '18 at 9:51
add a comment |
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On your timeout block you are first updating the team varibale on your test object. Which just updates the value and does not fire any trigger placed on scope. But when you call this creates a new object so change event fires. You should put you change event on onject level to watch the changes on objects, not on the scope level
– Utku Apaydin
Nov 15 '18 at 4:58
Can you answer it with a code please, since I didn't understand you.
onject level to watchwhat that means?– Raz
Nov 15 '18 at 6:08
1
this.test.$onChanges = () =>need to change event on object level not on the scope level (as @UtkuApaydin said)– Jean-Philippe Bergeron
Nov 15 '18 at 19:58
@Jean-PhilippeBergeron ty :)
– Utku Apaydin
Nov 16 '18 at 7:02
Each attribute I should wrap with this.MYATTR.$onChanges ?
– Raz
Nov 16 '18 at 9:51