MutationObserver - multiply MutationRecords
I have a chrome extension code that has MutationObserver.
.
when i create event to remove attribute "capturescreenshot" from document.head
and then an event to add "capturescreenshot" back (the events).
the MutationObserver observe this and i got 3 identical MutationRecords 
two for the removing attribute and one for the adding.
so.. i have two questions:
1) why is removing attribute makes two MutationRecord?
2) how can i know by MutationRecord if it refers to adding or removing attribute?
the events:
app.$(document.head).removeAttr("capturescreenshot");
app.$(document.head).attr("capturescreenshot", "{}");
MutationObserver:
bindExtensionEvent: function(eventName, callback) {
var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
var $observed = $(document.head);
var observer = new MutationObserver(function(mutations, observer) {
// fired when a mutation occurs
mutations.map(function(mutation) {
var attributeName = mutation.attributeName;
mutation-observers mutation-events
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
add a comment |
I have a chrome extension code that has MutationObserver.
.
when i create event to remove attribute "capturescreenshot" from document.head
and then an event to add "capturescreenshot" back (the events).
the MutationObserver observe this and i got 3 identical MutationRecords
two for the removing attribute and one for the adding.
so.. i have two questions:
1) why is removing attribute makes two MutationRecord?
2) how can i know by MutationRecord if it refers to adding or removing attribute?
the events:
app.$(document.head).removeAttr("capturescreenshot");
app.$(document.head).attr("capturescreenshot", "{}");
MutationObserver:
bindExtensionEvent: function(eventName, callback) {
var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
var $observed = $(document.head);
var observer = new MutationObserver(function(mutations, observer) {
// fired when a mutation occurs
mutations.map(function(mutation) {
var attributeName = mutation.attributeName;
mutation-observers mutation-events
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
Without a real MCVE (e.g. a working snippet in the question) I can only guess there's a bug in your code or in the browser.
– wOxxOm
Nov 25 '18 at 14:34
add a comment |
I have a chrome extension code that has MutationObserver.
.
when i create event to remove attribute "capturescreenshot" from document.head
and then an event to add "capturescreenshot" back (the events).
the MutationObserver observe this and i got 3 identical MutationRecords
two for the removing attribute and one for the adding.
so.. i have two questions:
1) why is removing attribute makes two MutationRecord?
2) how can i know by MutationRecord if it refers to adding or removing attribute?
the events:
app.$(document.head).removeAttr("capturescreenshot");
app.$(document.head).attr("capturescreenshot", "{}");
MutationObserver:
bindExtensionEvent: function(eventName, callback) {
var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
var $observed = $(document.head);
var observer = new MutationObserver(function(mutations, observer) {
// fired when a mutation occurs
mutations.map(function(mutation) {
var attributeName = mutation.attributeName;
mutation-observers mutation-events
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
I have a chrome extension code that has MutationObserver.
.
when i create event to remove attribute "capturescreenshot" from document.head
and then an event to add "capturescreenshot" back (the events).
the MutationObserver observe this and i got 3 identical MutationRecords
two for the removing attribute and one for the adding.
so.. i have two questions:
1) why is removing attribute makes two MutationRecord?
2) how can i know by MutationRecord if it refers to adding or removing attribute?
the events:
app.$(document.head).removeAttr("capturescreenshot");
app.$(document.head).attr("capturescreenshot", "{}");
MutationObserver:
bindExtensionEvent: function(eventName, callback) {
var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
var $observed = $(document.head);
var observer = new MutationObserver(function(mutations, observer) {
// fired when a mutation occurs
mutations.map(function(mutation) {
var attributeName = mutation.attributeName;
mutation-observers mutation-events
mutation-observers mutation-events
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
edited Nov 25 '18 at 22:04
Navarasu
2,0101923
2,0101923
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
asked Nov 25 '18 at 11:20
Adi MarsianoAdi Marsiano
1
1
Without a real MCVE (e.g. a working snippet in the question) I can only guess there's a bug in your code or in the browser.
– wOxxOm
Nov 25 '18 at 14:34
add a comment |
Without a real MCVE (e.g. a working snippet in the question) I can only guess there's a bug in your code or in the browser.
– wOxxOm
Nov 25 '18 at 14:34
Without a real MCVE (e.g. a working snippet in the question) I can only guess there's a bug in your code or in the browser.
– wOxxOm
Nov 25 '18 at 14:34
Without a real MCVE (e.g. a working snippet in the question) I can only guess there's a bug in your code or in the browser.
– wOxxOm
Nov 25 '18 at 14:34
add a comment |
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Without a real MCVE (e.g. a working snippet in the question) I can only guess there's a bug in your code or in the browser.
– wOxxOm
Nov 25 '18 at 14:34