...

/

React Controlled Components

React Controlled Components

Learn how to turn the Search component and its input field into a controlled component.

We'll cover the following...

Controlled components are not necessarily React components, but HTML elements. Let’s learn how to turn the Search component and its input field into a controlled component. Let’s go through a scenario that shows why we should follow the concept of controlled components throughout our React application. After applying the following change – giving the searchTerm an initial state – can you spot the mistake in your browser?

 ãF )   95@@ °n‰PNG


IHDR(-SäPLTE""""""""""""""""""2PX=r€)7;*:>H¤-BGEˆš8do5Xb6[eK™®Kš¯1MU9gs3S\I“§:gt'03@{‹V¹ÔT´ÏA}V»Ö@y‰6\fH’¦-CII”¨Eˆ›+;@7_i7_jFŠJ–«K›°H£-BHaÚû,@FCƒ”L³&.0W½ÙN£ºI“¨$)+B‘J•ªR¯È?v†>s>u„S±Ê=qP©ÁP¨ÀP§¿,?D4U^%+-M ¶K˜®%+,2OX+<ALœ²#&&D†˜%,.I•©vôTötRNSIæçJäeÀe¦©IDATxMŽµZEA„ÿÙ³	îî%R¡ïßáTThÇG…»,Á®Å=²Òîmífímnf’A–$â‡>!¦gºôHg½Eߏܵ}	Ý»ý‡º¼kdú§¯Jo—™Î3æL"J¹ ›ÌÕüQ‡$âçļffµ,é€5i9̟¯H¨/mB†‡wÍÜw;D
Ø+&‚W«ª¹¨Dôo@Ê´RI©ÐB¡om.Û³ÀIEND®B`‚‰PNG


IHDRשÍÊePLTE""""""""""""""""""""""""2RZN¢¹J–«3R[J—¬)59YÁÞ0KS4W`Q«ÄLœ²%+-0JR)6::gtC‚“"##?v†U·Ñ?w†<n{&-/YÂß=q:iuBA}A{ŒB‘/IPP§¿=q€K™®_ÔóL³$();lzR¯ÉaÚûI“¨ZÆã3U^1MU3T]ZÅâI“§X¿ÜF‹ž-BGP¨À6[e,@E5ZdO§¿-BHX¿Û+=AW¾Ú,@FW¼ØQªÃ?v…W¼×+<A@yˆ"#$\Ìê4Wa\ÌëS²Ì$(*.EL^ÑñVºÕ6]h#$%GŽ¡#&';jwV¹Ô-CIL›±ZÄá^Ðï>u„S°Ê/HNM ·_Õõ\ËéM ¶8doD…—D†˜>tƒ+=B[Èæ,>C>t‚<o}@y‰0LS.EKT´Î$'(%,.A~ŽW½ÙC’%+,\ÊèC!ätRNS‘í‰œG¾ÖOIDATxl‰ÃB¶Q…Ÿu´ß_ȳ<˦Ýveê²óa6AξŒûv¢{@ÎE'ÞdIÕ!çží ðC—ÔT‹þg1ÂE(ÏñSQsâi
ď…Zÿ·V¹Ð)ég!‰ªhÎùtéº-i}˜µµ<Õ?¶lBZaÄ´4{DÓ⌻_e8¥yǁ­À3ž)Ÿ¥?°f;8.ã¤tÌ=å;	:ã52fKZìlù¨ØšÍ9.ž#ƒÒAÁqÌúÛ®£Vÿ`=$¬Â?_¶¾®ÔqMç.ïJ$
?^q÷ñíۏï.},‚ìsæÝ_TttÔ¾1#‰/(ì—-[è`è`ÌÚïÅðZd5’Ž™›?ÎebZ¿Þˆi.Ûæ™ìq΄+1°}Œ5ùïçd¨G•ÏøIEND®B`‚‰PNG


IHDR  D¤ŠÆAPLTE"""""""""""""""""""""""""""2RZVºÖ_ÔôU·Ñ=r€$()'25]ÎíCƒ•0LS<o}XÀÜX¿Û0JQ=p~D„–<n{VºÕE‡™8do_ÔóEˆšF‹žH‘¥9dp_ÕõH¤I“¨FŒŸ6[e`Ö÷`×øL³/GM_ÓòU¸Ó'02P©Á/IPPªÂX¿Ü&/1;ly3R[`ØøGŽ¡T³Í\ÌêaÚû1OW"##Q«ÄaÙúR®Ç=q€`Öö.EL+=ATµÐ-CIK˜®#&'C‚“^ÐïI”¨&.04U^^Ñð@yˆZÇä$(*[Éç^Ññ,?DR¯É"#$1NV1MTD…—>u„;kxG R¯È/HN&-/@y‰>s>t‚@zŠ]ÍìP¨À$'(D†—]Ïî<n|0JRU·Ò×\¼	tRNS%­ñ'ïó(ò~ÑÝèžIDATx“šC1F_Ý¿MmÛ¶4¶m{ÿ˜¤n†çáÓ	®A$–à$b‘ Heø™TãWÄÂh•šh´:PtZ
Q«0@.`€Þ`4™-V`³Zì&‡A#ÁébkÝÄãñúØ>.''ø`C$FØÏ	‘(±x"6Xác”TÚéL§@Iù;dd-¹|¾P,Ȕ9¡R­ÕÍf3¢¿F½VmMíX§ÚíÍç@Y˜7ÎõºÕN¬=—ŽåÈʪu
}Ö¬«+‘e‡aiq ¤Ö76­íÝ=h
ûZìíîl›ë‡}á¨ʱ¥[F«I9A¹k9¥ÖëäŒ3¢Ã9ΡóžqB~Øáb¸ÃåU_¸^Ü[·ôw†ý{z‡v‡z‡Ù(Š£(Š£(þ›†Šfòq”ÉG–Éïkñ”ÏçŠY¾ÿªfäòÇ~à:*4ÓQ\O>Ÿ‘ ‡¼<דúW£éÍZ|ދÅ7“ñ•ïjTÔäãn”½»¢®`$Hð+ò¿GOñûð*èx‹•ø¥X*|”^ÿdIEND®B`‚‰PNG


IHDR@@·ì:PLTE"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""%+-@y‰W¼×`×ø^ÑñS²ÌC‚“,>C*8<XÁÝaÚûaÙùMŸµ+<AaÙúXÀÜ#%%TµÐLž´=q>u„K›°`ÖöA}L›±8do=r€%+,@yˆ^ÐïS²Ë)59=q€P©ÁU·Ò"#$PªÂ\Êè0JQQªÃ"##U·Ñ#&&_Ôô>t‚>s`Øø_Ôó5Yc1OW5Zd1NV+=B1MU+;@/GM\Ìê*;?3S\)8<2RZ_Õõ+=A]Ïî,@F,@E&-/0KS7alO¦¾9dp8amB~EˆšP¨ÀN¢¹'023T]]Îí?x‡3U^Cƒ•6\gU¸Ó&.0D„–7_iR­ÆH‘¥I”¨M ¶$(*?v…ZÆãX¿Ü-AG#$%[Éç8co[ÈæW½ÙC’'25?v†8bn%*+Lœ²N£º2PX)7;=p~(58^ÒòP§¿4WaQ«ÄT´Ï0JRQ¬ÅT´ÎI“¨6]hR¯ÉT³Í0LSF‹9eqEˆ›E‰œ9gsFŠCƒ”#&'\Ëé`Ö÷&/16\fB‘A{ŒR®Ç]Íì(47%,.*:>*9=9fr:gt7^iU¶Ð?w†ZÇäX¿Û^ÑðQ­ÅH£)6:V¹Ô'034U^E‡™.EL.FMK™®@zŠS×tRNS*Ž×øÖ”ý˜	»½•+üùóԐ,ØúôÀ=VIDATx¤ËµC!Ð‡C|ÿãÚ^yR]ÕMÛáO]ßÔÕÝ0NÈ2ÍËí¿"ªª¢(0Vã(ÀY%PDT-~(m¬ó!âKÞY£~´•üIÒf{³ÛÞáa¼§§ô3—ÕOp&”Ф‰¡xŽ÷#Ÿj­ôÚ¶mméòc)]m¤’‡É)Ƨgfçhk²ñÎÒ ægg¦Ç™šìÐ+X€ÅêuiyVת·k«°²\[ü:,Ø6ØÜjIJ
;»"»;°×XùþÛfÁáÇÍûý“SÎÎÏÏ8=Þo¾;æèÐ(ƒ‹öÓ¥BkÔeûÍ\7p+mîîáþNÚ<ÀQðOÒæùô³´y‚g»ttÐëo•ý½£ŸìVð»Òäsýü¬™ø”&_ðaüïV~à·Ö?­*8àQ ;8¥Á,¸¤‚f¥“1Üx¤†×§ñŸ*œøÑA¯Ôð°a#±³¶¦#ŠnP‘i+¼¶CÈ,ˆÆèäÍ_áNbÑá‚øç•HŽB*ÚÒ¦ L(^<ñÁ‚L6pJ¾P”É¥Ž©¢%"“R,ä9Èe3eRËa1(
¢ßqÇ8َ´ŠmK˱mƶmÛü·yi!èΪYÏuë ÀÏ_Àï?i÷ˆý+òŠÄA|ù{‘˜´?¿_En).JËD¤<€
©¬¢Z\Ts©R*(	¯©JŠ…uX/
4J9š¡5·DEµ4kÇ4‡&i¥V4Ú¡®Ð¯†vsf:àg,¢èBC»î$¶ºÍùá–@ôŠI_?<‘!^ŠÈàÓ½ÇöäõB‘%Làw±FD1ŠÁ¨(F€±øH˜%0Ʊ¿Å؄(¢0ˆÅÄ'Åæ—N.0u„@íY‡PWìIüaNâKš™Ä?ðÓµŒ=Žeœv/c—±ŒÓ0c0÷2Êë:ˆ06R-uÒÄ­\Q̶ää´¼µ6R#
ÆFš³6Òñ·rՁ­ìu˜æmâðž‡Iñi~ –Åü ÃsPþ"±óŸ¼
eiyå£ËPšàãÊò’§¡œÝÒ,S]U¦ºV…ªÖ”©®Z¦êoëë·xzã™âÆSnm¬{ÚºwaلÏ…Å»´Ýõ(mg/®þå½À¿¼ûŒ[§b³µq¶Å&Õ¯¹$ñzȊ‹H>aÌKT1/æø1O‚‰0¾.h͇YþAÓö£
-ê>ۋº«¢XÕ¢î}ߨëÛÑ;ÃöN´ØvÅýÎ¸ÿ1ë×ÄO@&v/Äþ_—ö\ôÇ\í.™½+0”;!fÊ¦´Ó% JY·O”ÂŽ'/Å]_Š;ßÀ'"&Nªn	aQ^”cx¦AáÒIEND®B`‚

While the list has been filtered according to the initial search, the input field doesn’t show the initial searchTerm. We want the input field to reflect the actual ...

Access this course and 1400+ top-rated courses and projects.