How does the jq loop bind the click event, and the this can point to the event itself?

<body>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
</body>

if you bind all the div events under the body and point to the bound div itself, ask the seniors to explain that the native events will 

var a = document.getElementsByTagName("body")[0].children
        for(let i =0;i<a.length;iPP){
            a[i].addEventListener("click",function(){
                console.log(this)
            })
        }
Javascript
Jun.03,2021 
$('body').on('click','> div',function(){
    console.log(this)
})
$('body div').on('click', function () {
    console.log(this);
})

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e48b07-44cd6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e48b07-44cd6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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