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React: components, state and interface decisions

Learn React through components, state, forms, asynchronous data and delivery. Interpret code and scenarios through original single- and multiple-choice questions.

BigSavantAvailable10 lessons700 estimated study minutes
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BigSavant10 lessons
YOUR LEARNING PLAN

Modules and lessons

Open a lesson to begin. Follow the sequence or revisit any concept.

0 / 10
01

Components, props and pure rendering

Build web components that receive data and describe an interface without changing inputs. Interpret JSX, composition and the difference between render and commit.

60 min
Open lesson02

Events, state snapshots and update queues

Interpret callbacks, captured values and composition of state updates. Distinguish event propagation, default behavior and a delayed action’s contract.

60 min
Open lesson03

State structure and component identity

Choose essential state, update objects without changing previous snapshots and define when a draft must be preserved or reset.

60 min
Open lesson04

Forms, DOM contracts and accessibility

Define who controls each field, associate labels with inputs and diagnose editing, submission and lost focus without confusing React state with DOM identity.

60 min
Open lesson05

Reducers, context and shared state

Centralize pure transitions in a reducer and distribute state through the appropriate subtree. Diagnose lost fields, incorrect providers and changing value identity.

60 min
Open lesson06

Effects, refs and external synchronization

Synchronize subscriptions with component lifecycle, declare dependencies and use refs without expecting automatic visual updates.

60 min
Open lesson07

Async data, Suspense and error boundaries

Distinguish waiting, failure and obsolete results. Integrate Promise reads with Suspense and Error Boundaries and define acceptance of out-of-order responses.

60 min
Open lesson08

Performance, transitions and rendering decisions

Choose optimizations while preserving behavior: memoization, pure calculation, update priority and deferred-value presentation. Distinguish measurement, caching and request ordering.

60 min
Open lesson09

Testing behavior and evidence boundaries

Choose queries and interactions that observe interface contracts. Interpret asynchronous tests, isolation and evidence limits without confusing a prepared response with real integration.

65 min
Open lesson10

Delivery, hydration and server boundaries

Distinguish client mounting from hydration, preserve initial output and interpret module boundaries in React Server Components. Bound transported data and raw HTML.

65 min
Open lesson
UNDERSTAND THE PATH

Objectives and progression

Learn React through components, state, forms, asynchronous data and delivery. Interpret code and scenarios through original single- and multiple-choice questions.

Audience

Web developers and support teams needing to interpret React components, explain behavior and diagnose interface failures.

Prerequisites

JavaScript fundamentals: functions, objects, arrays, modules, Promises and code reading. Basic HTML and CSS. TypeScript is a related progression when used by the project. Assessments require no tool installation or code execution.

What you will learn

  • Compose interfaces with explicit props, state and identity.
  • Diagnose forms, context and resource synchronization.
  • Separate loading, errors and optimization while preserving correctness.
  • Interpret test evidence, hydration and server/client boundaries.

What is available

10 lessons · 100 regular questions · 20 cases

Internal final assessment: 40 exercises in 90 minutes. Full mock exams are not yet available.

Assessments and mock exams reuse path exercises. They do not award certifications or guarantee passing an external exam.

Scope, review and limitations

Ten lessons with 100 regular questions and 20 original cases. Learn interface composition, identity and state preservation, resource synchronization and interpretation of loading, errors, tests and hydration. The baseline is React 19.3.0 for the web with JSX. All assessments use single or multiple choice with excerpts and scenarios, without code execution. The final assessment reuses 40 course items in 90 minutes. JavaScript and TypeScript fundamentals belong to separate paths; no complete framework implementation or React Native coverage is implied.

Internal 40-question assessment in 90 minutes, reusing course items, with single or multiple choice and no code execution. It is not an official exam and awards no external certification.

Independent education and assessment with original questions and scenarios. No affiliation, authorization, sponsorship or endorsement by React Foundation, and no official certification award. Technology names identify the course subjects; all trademarks belong to their respective owners.

CONTEXT AND TRANSPARENCY

References and version

Find the sources, content version and scope of this path.

Path content version

React 19.3.0; JSX

Content reviewed on 14 Oct 2026

Learning sources

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Independent preparation. Check the objectives, available content and coverage limits when planning your study.

Independent education and assessment with original questions and scenarios. No affiliation, authorization, sponsorship or endorsement by React Foundation, and no official certification award. Technology names identify the course subjects; all trademarks belong to their respective owners.

React is a project of the React Foundation, hosted by the Linux Foundation. Names and trademarks belong to their respective owners. This independent path is not affiliated with, authorized, sponsored or endorsed by the React Foundation or the Linux Foundation.