Properties in JavaScript definition versus assignment

Definition. To define a property, one uses a function such as.. Assignment has the side effect of creating a property if it doesnt exist, yet as an own property of obj, with default attributes.

  • Properties in JavaScript: definition versus assignment
  • Recap: property attributes and internal properties
  • The details of definition and assignment
  • Assignment calls a setter in a prototype, definition creates an own property
  • Read-only properties in prototypes prevent assignment, but not definition
  • The assignment operator does not change properties in prototypes
  • Only definition allows you to create a property with arbitrary attributes

Source: https://2ality.com/2012/08/property-definition-assignment.html

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