The usage of JS native attachevent and AddEventListener

Now jquery is more popular, so we use more is jquery, rarely with the native JS. But still need to understand the drop.

The code is as follows:

<a id= "Btnclick" href= "javascript:void (0);" > Click me </a>

If we're going to bind three functions to the button's Click button, it's easier for a person with less knowledge of JS to write this:

<script type="text/javascript">var ele=document.getelementbyid ("  test"); Ele.click=Method1;ele.click=Method2;ele.click=  method3; </script>

This is wrong because the click event will only execute function 3. So we need to use the attachevent and AddEventListener events, attachevent only for IE browser, and AddEventListener only for Firefox

Browser. The correct wording is as follows:

<script type="Text/javascript">varEle=document.getelementbyid ("Test");if(window.attachevent) {ele.attachevent ("onclick", function () {alert ("you clicked on me.");}) Ele.attachevent ("onclick", function () {alert ("you hit me again.");}) Ele.attachevent ("onclick", function () {alert ("And you hit me again.");})}Else{Ele.addeventlistener ("Click", function () {alert ("you clicked on me.");}) Ele.addeventlistener ("Click", function () {alert ("you hit me again.");}) Ele.addeventlistener ("Click", function () {alert ("And you hit me again.");})}</script>

Careful people will find that using attachevent when we use the onclick, with AddEventListener when using the click.

At the same time, the functions used to remove the binding are Deattachevent and RemoveEventListener respectively.

The usage of JS native attachevent and AddEventListener