How to use the addEventListener event in js
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"
}
}
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