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HTML DOM Dokument verwyderEventListener()

Voorbeeld

Verwyder 'n "mousemove" gebeurtenis wat aangeheg is met die addEventListener() metode:

// Attach an event handler to the document
document.addEventListener("mousemove", myFunction);

// Remove the event handler from the document
document.removeEventListener("mousemove", myFunction);

Meer "Probeer dit self" voorbeelde hieronder.


Definisie en gebruik

Die document.removeEventListener()-metode verwyder 'n gebeurtenishanteerder wat met die document.addEventListener() -metode aangeheg is.

Let wel: Om gebeurtenishanteerders te verwyder, moet die funksie gespesifiseer met die addEventListener() metode 'n eksterne, "benoemde" funksie wees, soos in die voorbeeld hierbo (myFunction).

Anonieme funksies, soos "document.removeEventListener(" event ", function(){ myScript });" sal nie werk nie.

Wenk: Gebruik die element .addEventListener() en element .removeEventListener() metodes om gebeurtenishanteerders by/van 'n gespesifiseerde element by te voeg/verwyder.


Sintaksis

document.removeEventListener(event, function, useCapture)

Parameterwaardes

Parameter Description
event Required. A String that specifies the name of the event to remove.

Note: Do not use the "on" prefix. For example, use "click" instead of "onclick".

Tip: For a list of all HTML DOM events, look at our complete HTML DOM Event Object Reference.
function Required. Specifies the function to remove.
useCapture Optional. A Boolean value that specifies the event phase to remove the event handler from.

Possible values:
  • true - Removes the event handler from the capturing phase
  • false- Default. Removes the event handler from the bubbling phase
Note: If the event handler was attached two times, one with capturing and one bubbling, each must be removed separately.


Tegniese besonderhede

DOM weergawe: DOM Vlak 2-geleenthede
Terugkeerwaarde: Geen terugkeerwaarde nie
Veranderinglog: Die useCapture-parameter het opsioneel geword in Firefox 6 en Opera 12.0 (was nog altyd opsioneel vir Chrome, IE en Safari)

Meer voorbeelde

Voorbeeld

Vir blaaiers wat nie die removeEventListener()-metode ondersteun nie, kan jy die detachEvent()-metode gebruik.

Hierdie voorbeeld demonstreer 'n kruisblaaier-oplossing:

if (document.removeEventListener) {         // For all major browsers, except IE 8 and earlier
  document.removeEventListener("mousemove", myFunction);
} else if (document.detachEvent) {          // For IE 8 and earlier versions
  document.detachEvent("onmousemove", myFunction);
}

Verwante bladsye

JavaScript-tutoriaal: HTML DOM EventListener

JavaScript-verwysing: element .removeEventListener()


Blaaierondersteuning

document.removeEventListener()is 'n DOM Vlak 2 (2001) kenmerk.

Dit word ten volle ondersteun in alle blaaiers:

Chrome IE Edge Firefox Safari Opera
Yes 9-11 Yes Yes Yes Yes