assignment of member in read only object error

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1. assignment of member 'port' in read-only object

   

2. [SOLVED] Valueerror assignment destination is read-only

   

3. Cannot assign to read only property of Object in JavaScript

   

4. Cannot assign to read only property 'exports' of object

   

5. javascript

   

6. fix-regexp caused a 'assign to read only property' error · Issue #461 · zloirock/core-js · GitHub