โปรดตรวจสอบว่าข้อมูลคืองานจาวาสคริปต์

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จาวาสคริปต์ทดสอบถ้าธาตุมีสมาธิ

var myElement = document.getElementById('myID');
if(myElement === document.activeElement){
    //myElement Has Focus
}

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