ยังไงฉันตรวจสอบว่าเป็นสิ่งมีกุญแจเหรอ?

รหัสตัวอย่าง

N

myObj.hasOwnProperty('key') // it checks object for particular key and not on prototype

-2

N

if ('key' in myObj)
// better
if (!myObj.hasOwnProperty('key'))

หน้าคล้ายกัน

คล้ายกันหน้ากับตัวอย่าง

สิ่งมีกุญแจ javascrip

เอาสิ่งกุญแจรวมถึงค่าจาวาสคริปต์

มีกุญแจอยู่ในวัตถุ js

มีวัตถุกุญแจ js

ถ้าสิ่งกุญแจรรจุข้อความ

รวมถึงการกุญแจวัตถุ javadscript

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