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Editor to share with you how to use the addEventListener event in js, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The usage of addEventListener

The js listener can bind to a html element. Like this. Document.getElementById ("btn1") addEventListener ('click',judje)

Functionjudje (a) {

Alert ("sss")

}

When you click the btn button in this way, you can pop up a prompt box with the content of sss.

But this is not the use of addEventListener.

The most common method is to hide a place when the place you click on is not a piece of div.

Js listener addEventListenerHTML code

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Javascript code

Document.addEventListener ('click',judje)

Functionjudje (a) {

If (a.target.idcards = "img2") {

Document.getElementById ("div1_4_1") .style.display = "none"

}

}

The above is all the content of the article "how to use addEventListener events in js". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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