JavaScript Error: Uncaught TypeError: Cannot read property '' of null

JavaScript TypeError is returned when an operand or argument passed to a function is incompatible with the type expected by that operator or function. This error occurs in the browser when you read a property or call a method on an undefined object.
There are a few variations of this error depending on the property you are trying to access. Sometimes instead of undefined it will output null: Uncaught TypeError: Cannot read property '' of null

Cannot read property '' of undefined

Cannot read property '' of null

Undefined means that a variable has been declared, but the value of that variable has not yet been defined. In JavaScript, there are Undefined (type), undefined (value) and undefined (variable).
This error occurs when you try to call a method or try to access a property of a variable that does not exist (is not an object). This error occurs when we want to access a property on a variable whose value is undefined or null.

Null vs. Undefined in JavaScript The value "undefined" indicates that a variable has been declared, but no value has been assigned. On the other hand, "null" refers to a non-existent object, which basically means "empty" or "nothing". These are two values ​​generally used to indicate the absence of something. Also, undefined and null are two distinct types: undefined is a type itself (undefined) while null is an object.

Other Javascript errors :

• Cannot read property adatasort
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• Cannot read property checked
• Cannot read property 3
• Cannot read property y
• Cannot read property key
• Cannot read property extend
• Cannot read property includes
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• Cannot read property render
• Cannot read property write
• Cannot read property split
• Cannot read property contains
• Cannot read property play
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• Cannot read property remove
• Cannot read property visible
• Cannot read property trim
• Cannot read property install
• Cannot read property addeventlistener
• Cannot read property left
• Cannot read property data
• Cannot read property foreach
• Cannot read property quesryselectorall
• Cannot read property document
• Cannot read property json
• Cannot read property pending
• Cannot read property match
• Cannot read property element
• Cannot read property add
• Cannot read property reset
• Cannot read property createelement
• Cannot read property x
• Cannot read property formatdate
• Cannot read property websiteid
• Cannot read property bind
• Cannot read property bind
• Cannot read property history
• Cannot read property mouse
• Cannot read property init
• Cannot read property nodename
• Cannot read property indexof
• Cannot read property use
• Cannot read property value
• Cannot read property ngmodule
• Cannot read property queryselector
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• Cannot read property have
• Cannot read property keyboard
• Cannot read property innerhtml
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• Cannot read property setstate
• Cannot read property browser
• Cannot read property rows
• Cannot read property datatable

Uncaught TypeError: Cannot read property '' of null