Error guides tagged [react]

15 guides found
RCT
Cannot update a component while rendering another component - How to resolve this issue

A child component schedules a state update on its parent during the render phase.

reactlifecycle errorcommon
updated June 28, 2026
RCT
Each child should have a unique key - How to resolve this issue

A warning indicating that elements returned in a list mapping lack a unique 'key' attribute.

reactvirtual dom warningcommon
updated June 28, 2026
RCT
Element type is invalid - How to resolve this issue

React expected a component type but received undefined or an object.

reactimport errorcommon
updated June 28, 2026
RCT
Failed to compile - How to resolve this issue

The bundler compiler failed to build the React application due to compile errors.

reactbuild errorcommon
updated June 28, 2026
RCT
Function components cannot be given refs - How to resolve this issue

A ref was attached to a function component that does not support forwardRef.

reactrefs warningcommon
updated June 28, 2026
RCT
Hydration failed - How to resolve this issue

The server-rendered HTML structure did not match the initial client-side render.

reactssr errorcommon
updated June 28, 2026
RCT
Invalid Hook Call - How to resolve this issue

The Invalid Hook Call error occurs when a React Hook (such as useState, useEffect, or useContext) is called in a place where Hooks are not allowed.

reacthooksmedium
updated June 28, 2026
RCT
Maximum update depth exceeded - How to resolve this issue

React stops execution because a component repeatedly schedules updates inside lifecycle callbacks or useEffect hooks.

reactlifecycle errorcommon
updated June 28, 2026
RCT
Minified React error #130 - How to resolve this issue

Element type is invalid (Production Minified variant #130).

reactproduction exceptioncommon
updated June 28, 2026
RCT
Minified React error #31 - How to resolve this issue

Objects are not valid as a React child (Production Minified variant #31).

reactproduction exceptioncommon
updated June 28, 2026