js check if key is in object code example
Example 1: how to check if object has key javascript
myObj.hasOwnProperty('key')
Example 2: js object contain key
if ('key' in myObj)
if (!myObj.hasOwnProperty('key'))
Example 3: typescript check if object has key
if ('key' in myObj)
Example 4: check object has key javascript
Object.prototype.hasOwnProperty()
Example 5: javascript if object has key
if('key' in object)
Example 6: js check if object key exists
var obj = { key: undefined };
obj["key"] !== undefined