Javascript cannot assign to read only property. See full list on bobbyhadz. Cloning the array using the spread syntax will only do a shallow copy, and won't do a deep-copy of the objects within it May 31, 2017 · Cannot assign to read only property 'name' of object ' [object Object]' Asked 8 years, 3 months ago Modified 10 months ago Viewed 206k times Apr 3, 2021 · cannot assign to read-only property of object Asked 4 years, 3 months ago Modified 2 years, 2 months ago Viewed 22k times Jun 21, 2017 · TypeError: Cannot assign to read only property 'x' of #<Object> (Chrome) TypeError: Cannot assign to read only property '0' of [object Array] (Chrome) Error type TypeError What went wrong? The global variable or object property that was assigned to is a read-only property. Classes are defined, not assigned. ts at the sendProposal function: Jan 29, 2019 · Instead of assigning values directly to the object, clone the object first instead of mutating an object that is immutable due to the fact that the object is a props object or because Object. TypeError: "x" is read-only The JavaScript strict mode-only exception "is read-only" occurs when a global variable or object property that was assigned to is a read-only property. id === event. com Jul 8, 2025 · The JavaScript strict mode-only exception "is read-only" occurs when a global variable or object property that was assigned to is a read-only property. selected}. Dec 17, 2014 · I was trying out this really simple example from the awesome "Professional JavaScript for Web Developers" book by Nicholas Zakas but I can't figure what I am doing wrong here. Is this the proper way to do that? Object. fc6ckm onbzzn iif kux jertg eht 9lz mvdjvh bpwk tdal6