Smoke Test - MDN Web Docs Glossary

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Smoke test

A smoke test consists of functional or unit tests of critical software functionality. Smoke testing comes before further, in-depth testing.

Smoke testing answers questions like

• "Does the program start up correctly?"
• "Do the main control buttons function?"
• "Can you save a simple blank new test user account?"

If this basic functionality fails, there is no point investing time in more detailed QA work at this stage.

In this article

• See also

See also

• Smoke testing (software) on Wikipedia

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This page was last modified on ⁨Jul 18, 2025⁩ by MDN contributors.

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1. Glossary
2. 1. Abstraction
   2. Accent
   3. Accessibility
   4. Accessibility tree
   5. Accessible description
   6. Accessible name
   7. Adobe Flash
   8. Advance measure
   9. Ajax
   10. Algorithm
   11. Alignment container
   12. Alignment subject
   13. Alpha (alpha channel)
   14. ALPN
   15. API
   16. Apple Safari
   17. Application context
   18. Argument
   19. ARIA
   20. ARPA
   21. ARPANET
   22. Array
   23. ASCII
   24. Aspect ratio
   25. Asynchronous
   26. ATAG
   27. Attribute
   28. Authentication
   29. Authenticator
   30. Bandwidth
   31. Base64
   32. Baseline
       1. Baseline (compatibility)
       2. Baseline (typography)
   33. BCP 47 language tag
   34. Beacon
   35. Bézier curve
   36. bfcache
   37. BiDi
   38. BigInt
   39. Binding
   40. Bitwise flags
   41. Blink
   42. blink element (<blink> tag)
   43. Block
       1. Block (CSS)
       2. Block (scripting)
   44. Block cipher mode of operation
   45. Block-level content
   46. Boolean
       1. Boolean (JavaScript)
       2. Boolean attribute (ARIA)
       3. Boolean attribute (HTML)
   47. Bounding box
   48. Breadcrumb
   49. Brotli compression
   50. Browser
   51. Browsing context
   52. Buffer
   53. Bun
   54. Cache
   55. Cacheable
   56. CalDAV
   57. Call stack
   58. Callback function
   59. Camel case
   60. Canonical order
   61. Canvas
   62. Card sorting
   63. CardDAV
   64. Caret
   65. CDN
   66. Certificate authority
   67. Certified
   68. Challenge-response authentication
   69. Character
   70. Character encoding
   71. Character reference
   72. Character set
   73. Chrome
   74. CIA
   75. Cipher
   76. Cipher suite
   77. Ciphertext
   78. Class
   79. Client-side rendering (CSR)
   80. Closure
   81. Cloud
   82. Cloud computing
   83. CMS
   84. Code point
   85. Code splitting
   86. Code unit
   87. Codec
   88. Color space
   89. Color wheel
   90. Compile
   91. Compile time
   92. Composite operation
   93. Compression Dictionary Transport
   94. Computer programming
   95. Conditional
   96. Constant
   97. Constructor
   98. Content header
   99. Continuous integration
   100. Continuous media
   101. Control flow
   102. Cookie
   103. Copyleft
   104. CORS
   105. CORS-safelisted request header
   106. CORS-safelisted response header
   107. Crawler
   108. Credential
   109. CRLF
   110. Cross Axis
   111. Cross-site request forgery (CSRF)
   112. Cross-site scripting (XSS)
   113. CRUD
   114. Cryptanalysis
   115. Cryptography
   116. CSP
   117. CSS
   118. CSS Object Model (CSSOM)
   119. CSS pixel
   120. CSS preprocessor
   121. Cumulative Layout Shift (CLS)
   122. Data structure
   123. Database
   124. Debounce
   125. Decryption
   126. Deep copy
   127. Delta
   128. Denial of Service (DoS)
   129. Deno
   130. Descriptor (CSS)
   131. Deserialization
   132. Developer tools
   133. Device pixel
   134. Digital certificate
   135. Digital signature
   136. Distributed Denial of Service (DDoS)
   137. DMZ
   138. DNS
   139. Doctype
   140. Document directive
   141. Document environment
   142. DOM (Document Object Model)
   143. Domain
   144. Domain name
   145. Domain sharding
   146. Dominator
   147. DSL
        1. DSL (Digital Subscriber Line)
        2. DSL (Domain-Specific Language)
   148. DTLS (Datagram Transport Layer Security)
   149. DTMF (Dual-Tone Multi-Frequency signaling)
   150. Dynamic typing
   151. ECMA
   152. ECMAScript
   153. Effective connection type
   154. Element
   155. Encapsulation
   156. Encryption
   157. Endianness
   158. Engine
        1. JavaScript engine
        2. Rendering engine
   159. Entity
   160. Entity header
   161. Enumerated
   162. Escape character
   163. eTLD
   164. Event
   165. Exception
   166. EXIF
   167. Expando
   168. Extrinsic size
   169. Fallback alignment
   170. Falsy
   171. Favicon
   172. Federated identity
   173. Fetch directive
   174. Fetch metadata request header
   175. Fingerprinting
   176. Firefox OS
   177. Firewall
   178. First Contentful Paint (FCP)
   179. First CPU idle
   180. First Input Delay (FID) Deprecated
   181. First Meaningful Paint (FMP)
   182. First Paint (FP)
   183. First-class function
   184. Flex
   185. Flex container
   186. Flex item
   187. Flexbox
   188. Flow relative values
   189. Forbidden request header
   190. Forbidden response header name
   191. Fork
   192. Fragmentainer
   193. Frame rate (FPS)
   194. FTP
   195. FTU
   196. Function
   197. Fuzz testing
   198. Gamut
   199. Garbage collection
   200. Gecko
   201. General header
   202. GIF
   203. Git
   204. Global object
   205. Global scope
   206. Global variable
   207. Glyph
   208. Google Chrome
   209. GPL
   210. GPU
   211. Graceful degradation
   212. Grid
   213. Grid areas
   214. Grid Axis
   215. Grid Cell
   216. Grid Column
   217. Grid container
   218. Grid lines
   219. Grid Row
   220. Grid Tracks
   221. Guaranteed-invalid value
   222. Gutters
   223. gzip compression
   224. Hash function
   225. Hash routing
   226. Head
   227. High-level programming language
   228. HMAC
   229. Hoisting
   230. HOL blocking
   231. Host
   232. Hotlink
   233. Houdini
   234. HPKP
   235. HSTS
   236. HTML
   237. HTML color codes
   238. HTML5
   239. HTTP
   240. HTTP content
   241. HTTP header
   242. HTTP/2
   243. HTTP/3
   244. HTTPS
   245. HTTPS RR
   246. Hyperlink
   247. Hypertext
   248. IANA
   249. ICANN
   250. ICE
   251. IDE
   252. Idempotent
   253. Identifier
   254. Identity provider (IdP)
   255. IDL
   256. IETF
   257. IIFE
   258. IMAP
   259. Immutable
   260. IndexedDB
   261. Information architecture
   262. Inheritance
   263. Ink overflow
   264. Inline-level content
   265. Input method editor
   266. Inset properties
   267. Instance
   268. Interaction to Next Paint (INP)
   269. Internationalization (i18n)
   270. Internet
   271. Interpolation
   272. Intrinsic size
   273. Invariant
   274. IP Address
   275. IPv4
   276. IPv6
   277. IRC
   278. ISO
   279. ISP
   280. ITU
   281. Jank
   282. Java
   283. JavaScript
   284. Jitter
   285. JPEG
   286. JSON
   287. JSON type representation
   288. Just-In-Time Compilation (JIT)
   289. Kebab case
   290. Key
   291. Keyword
   292. Largest Contentful Paint (LCP)
   293. Latency
   294. Layout mode
   295. Layout viewport
   296. Lazy load
   297. Leading
   298. LGPL
   299. Ligature
   300. Literal
   301. Local scope
   302. Local variable
   303. Locale
   304. Localization
   305. Logical properties
   306. Long task
   307. Loop
   308. Lossless compression
   309. Lossy compression
   310. LTR (Left To Right)
   311. Main axis
   312. Main thread
   313. Markup
   314. MathML
   315. Media
        1. Media (Audio-visual presentation)
        2. Media (CSS)
   316. Media query
   317. Metadata
   318. Method
   319. Microsoft Edge
   320. Microsoft Internet Explorer
   321. Middleware
   322. MIME
   323. MIME type
   324. Minification
   325. MitM
   326. Mixin
   327. Mobile first
   328. Modem
   329. Modularity
   330. Mozilla Firefox
   331. Multi-factor authentication
   332. Mutable
   333. MVC
   334. Namespace
   335. NaN
   336. NAT
   337. Native
   338. Navigation directive
   339. Netscape Navigator
   340. Network throttling
   341. NNTP
   342. Node
        1. Node (DOM)
        2. Node (networking)
   343. Node.js
   344. Non-normative
   345. Nonce
   346. Normative
   347. Null
   348. Nullish value
   349. Number
   350. Object
   351. Object reference
   352. OOP
   353. OpenGL
   354. OpenSSL
   355. Opera browser
   356. Operand
   357. Operator
   358. Origin
   359. OTA
   360. OWASP
   361. P2P
   362. PAC
   363. Packet
   364. Page load time
   365. Page prediction
   366. Parameter
   367. Parent object
   368. Parse
   369. Parser
   370. Payload body
   371. Payload header
   372. PDF
   373. Perceived performance
   374. Percent-encoding
   375. PHP
   376. Physical properties
   377. Pixel
   378. Placeholder names
   379. Plaintext
   380. Plugin
   381. PNG
   382. Polyfill
   383. Polymorphism
   384. POP3
   385. Port
   386. Prefetch
   387. Preflight request
   388. Prerender
   389. Presto
   390. Primitive
   391. Principle of least privilege
   392. Privileged
   393. Privileged code
   394. Progressive enhancement
   395. Progressive web applications (PWAs)
   396. Promise
   397. Property
        1. Property (CSS)
        2. Property (JavaScript)
   398. Protocol
   399. Prototype
   400. Prototype-based programming
   401. Proxy server
   402. Pseudo-class
   403. Pseudo-element
   404. Pseudocode
   405. Public-key cryptography
   406. Python
   407. Quality values
   408. Quaternion
   409. QUIC
   410. RAIL
   411. Random Number Generator
   412. Raster image
   413. Rate limit
   414. RDF
   415. Reading order
   416. Real User Monitoring (RUM)
   417. Recursion
   418. Reflow
   419. Regular expression
   420. Relying party
   421. Render-blocking
   422. Repaint
   423. Replaced elements
   424. Replay attack
   425. Repo
   426. Reporting directive
   427. Representation header
   428. Request header
   429. Resource Timing
   430. Response header
   431. Responsive Web Design (RWD)
   432. REST
   433. RGB
   434. RIL
   435. Robots.txt
   436. Round Trip Time (RTT)
   437. Router
   438. RSS
   439. Rsync
   440. RTCP (RTP Control Protocol)
   441. RTF
   442. RTL (Right to Left)
   443. RTP (Real-time Transport Protocol) and SRTP (Secure RTP)
   444. RTSP: Real-time streaming protocol
   445. Ruby
   446. Safe
        1. Safe (HTTP Methods)
   447. Salt
   448. Same-origin policy
   449. SCM
   450. Scope
   451. Screen reader
   452. Script-supporting element
   453. Scroll boundary
   454. Scroll chaining
   455. Scroll container
   456. Scroll snap
   457. SCTP
   458. SDK (Software Development Kit)
   459. SDP
   460. Search engine
   461. Secure context
   462. Secure Sockets Layer (SSL)
   463. Selector (CSS)
   464. Semantics
   465. SEO
   466. Serializable object
   467. Serialization
   468. Server
   469. Server Timing
   470. Server-side rendering (SSR)
   471. Session hijacking
   472. SGML
   473. Shadow tree
   474. Shallow copy
   475. Shim
   476. Signature
        1. Signature (functions)
        2. Signature (security)
   477. SIMD
   478. SISD
   479. Site
   480. Site map
   481. SLD
   482. Sloppy mode
   483. Slug
   484. Smoke test
   485. SMPTE (Society of Motion Picture and Television Engineers)
   486. SMTP
   487. Snake case
   488. Snap positions
   489. SOAP
   490. Social engineering
   491. Source map
   492. SPA (Single-page application)
   493. Specification
   494. Speculative parsing
   495. Speed index
   496. SQL
   497. SQL injection
   498. SRI
   499. Stacking context
   500. State machine
   501. Statement
   502. Static method
   503. Static site generator (SSG)
   504. Static typing
   505. Sticky activation
   506. Strict mode
   507. String
   508. Stringifier
   509. STUN
   510. Style origin
   511. Stylesheet
   512. Submit button
   513. SVG
   514. SVN
   515. Symbol
   516. Symmetric-key cryptography
   517. Synchronous
   518. Syntax
   519. Syntax error
   520. Synthetic monitoring
   521. Table grid box
   522. Table wrapper box
   523. Tag
   524. TCP
   525. TCP handshake
   526. TCP slow start
   527. Telnet
   528. Texel
   529. The Khronos Group
   530. Thread
   531. Three js
   532. Throttle
   533. Time to First Byte (TTFB)
   534. Time to Interactive (TTI)
   535. TLD
   536. TOFU
   537. Top layer
   538. Transient activation
   539. Transport Layer Security (TLS)
   540. Tree shaking
   541. Trident
   542. Truthy
   543. TTL
   544. TURN
   545. Type
   546. Type coercion
   547. Type conversion
   548. TypeScript
   549. UAAG
   550. UDP (User Datagram Protocol)
   551. UI
   552. Undefined
   553. Unicode
   554. Unix time
   555. URI
   556. URL
   557. URN
   558. Usenet
   559. User agent
   560. UTF-8
   561. UTF-16
   562. UUID
   563. UX
   564. Validator
   565. Value
   566. Variable
   567. Vendor prefix
   568. Viewport
   569. Visual viewport
   570. Void element
   571. VoIP
   572. W3C
   573. WAI
   574. WCAG
   575. Web performance
   576. Web server
   577. Web standards
   578. WebAssembly
   579. WebDAV
   580. WebExtensions
   581. WebGL
   582. WebIDL
   583. WebKit
   584. WebM
   585. WebP
   586. WebRTC
   587. WebSockets
   588. WebVTT
   589. WHATWG
   590. Whitespace
   591. WindowProxy
   592. World Wide Web
   593. Wrapper
   594. XForms Deprecated
   595. XHTML
   596. XInclude
   597. XLink
   598. XML
   599. XMLHttpRequest (XHR)
   600. XPath
   601. XQuery
   602. XSLT
   603. Zstandard compression