Object.observe - Revision history

Ghenne at 22:52, 24 July 2019

2019-07-24T22:52:07Z

@@ Line 8: / Line 8: @@
 Important: This feature is only available in the Chrome browser, either on the desktop or on an Android device.
-== Example (Basic) ==
+== Example ==
-<pre>
+<tabber>
-Rem Object.observe Example
+ JavaScript=
-myArray = []
+<syntaxhighlight lang="JavaScript">
 // Object.observe Example
@@ Line 42: / Line 27: @@
    console.log(chnge.type, chnge.name, chnge.oldValue))
+}
-</pre>
+</syntaxhighlight>
 == Output ==

Ghenne: /* Description */

2014-10-04T15:22:34Z

Description

← Older revision		Revision as of 15:22, 4 October 2014
Line 5:		Line 5:

	Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control. This can be very useful in debugging, to watch the value of an object change during runtime. Object.unobserve stops calling ''function''.		Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control. This can be very useful in debugging, to watch the value of an object change during runtime. Object.unobserve stops calling ''function''.

			Important: This feature is only available in the Chrome browser, either on the desktop or on an Android device.

	== Example (Basic) ==		== Example (Basic) ==

Ghenne at 18:49, 3 October 2014

2014-10-03T18:49:31Z

← Older revision		Revision as of 18:49, 3 October 2014
Line 1:		Line 1:
	Object.observe(''object'', ''function'')		Object.observe(''object'', ''function'')
			Object.unobserve(''object'')

	== Description ==		== Description ==

	Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control. This can be very useful in debugging, to watch the value of an object change during runtime.		Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control. This can be very useful in debugging, to watch the value of an object change during runtime. Object.unobserve stops calling ''function''.

	== Example (Basic) ==		== Example (Basic) ==

Ghenne: /* Example (Basic) */

2014-10-03T18:44:32Z

Example (Basic)

← Older revision		Revision as of 18:44, 3 October 2014
Line 19:		Line 19:

	Function whatChanged(chnge)		Function whatChanged(chnge)
	console.log(chnge.type, chnge.name, .oldValue)		console.log(chnge.type, chnge.name, chnge.oldValue)
	End Function		End Function
	</pre>		</pre>

Ghenne: /* Description */

2014-10-03T18:44:09Z

Description

← Older revision		Revision as of 18:44, 3 October 2014
Line 3:		Line 3:
	== Description ==		== Description ==

	Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control.		Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control. This can be very useful in debugging, to watch the value of an object change during runtime.

	== Example (Basic) ==		== Example (Basic) ==

Ghenne: Created page with "Object.observe(''object'', ''function'') == Description == Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection..."

2014-10-03T18:43:13Z

Created page with "Object.observe(''object'', ''function'') == Description == Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection..."

New page

Object.observe(''object'', ''function'')

== Description ==

Object.observe calls ''function'' whenever there is a change to ''object''. ''Object'' can be an array, collection, object, class or control.

== Example (Basic) ==

<pre>
Rem Object.observe Example
myArray = []
Object.observe(myArray, somethingChanged)
myArray[0]=100
myArray[0]=200

Function somethingChanged(changes)
ForEach(changes, whatChanged)
End Function

Function whatChanged(chnge)
console.log(chnge.type, chnge.name, .oldValue)
End Function
</pre>

== Example (JavaScript) ==
<pre>
// Object.observe Example

myArray = [];
Object.observe(myArray, somethingChanged);
myArray[0]=100;
myArray[0]=200;

function somethingChanged(changes){
ForEach(changes, whatChanged)
}

function whatChanged(chnge) {
console.log(chnge.type, chnge.name, chnge.oldValue))
}
</pre>

== Output ==

<pre>
add 0 undefined
update length 0
update 0 100
</pre>

== Related Items ==

[[do...loop|Do...Loop]], [[exit|Exit]], [[for...next|For...Next]], [[while...wend|While...Wend]], [[For Each...Next]]

[[Category:Language Reference]]

[[Category:Statements - Flow of control]]