[PDF] [PDF] JavaScript for impatient programmers (ES2022 edition) - Exploring JS

View - Download [PDF] JavaScript for impatient programmers (ES2022 edition) - Exploring JS

Previous PDF

Next PDF

JavaScript

For Impatient Programmers

ECMAScript 2022 Edition

Dr. Axel Rauschmayer

-DYD6FULSW IRU LPSDWLHQW SURJUDPPHUV (6 HGLWLRQ

3DP 6HOOH

7HMLQGHU 6LQJK

6KHOOH\ 3RZHUV

&RQWHQWV , %DFNJURXQG %HIRUH \RX EX\ WKH ERRN )$4 ERRN DQG VXSSOHPHQWDU\ PDWHULDO +LVWRU\ DQG HYROXWLRQ RI -DYD6FULSW 1HZ -DYD6FULSW IHDWXUHV )$4 -DYD6FULSW 9DOXHV 2SHUDWRUV ,9 3ULPLWLYH YDOXHV 7KH QRQYDOXHVDQG %RROHDQV 1XPEHUV %LJLQWV ² DUELWUDU\SUHFLVLRQ LQWHJHUV >(6@ DGYDQFHG 8QLFRGH ² D EULHI LQWURGXFWLRQ DGYDQFHG 6WULQJV 8VLQJ WHPSODWH OLWHUDOV DQG WDJJHG WHPSODWHV 6\PEROV

9 &RQWURO ÁRZ DQG GDWD ÁRZ

&RQWURO ÁRZ VWDWHPHQWV ([FHSWLRQ KDQGOLQJ &DOODEOH YDOXHV (YDOXDWLQJ FRGH G\QDPLFDOO\ DGYDQFHG

9, 0RGXODULW\

0RGXOHV 2EMHFWV &ODVVHV >(6@ :KHUH DUH WKH UHPDLQLQJ FKDSWHUV"

3DUW ,

%DFNJURXQG &KDSWHU %HIRUH \RX EX\ WKH ERRN &RQWHQWV $ERXW WKH FRQWHQW 3UHYLHZLQJ DQG EX\LQJ WKLV ERRN $ERXW WKH DXWKRU $FNQRZOHGJHPHQWV $ERXW WKH FRQWHQW :KDW·V LQ WKLV ERRN" :KDW LV QRW FRYHUHG E\ WKLV ERRN" ,VQ·W WKLV ERRN WRR ORQJ IRU LPSDWLHQW SHRSOH" 3UHYLHZLQJ DQG EX\LQJ WKLV ERRN +RZ FDQ , SUHYLHZ WKH ERRN WKH H[HUFLVHV DQG WKH TXL]]HV" +RZ FDQ , EX\ D GLJLWDO YHUVLRQ RI WKLV ERRN" +RZ FDQ , EX\ WKH SULQW YHUVLRQ RI WKLV ERRN" $ERXW WKH DXWKRU $FNQRZOHGJHPHQWV &KDSWHU )$4 ERRN DQG VXSSOHPHQWDU\

PDWHULDO

&RQWHQWV +RZ WR UHDG WKLV ERRN , RZQ D GLJLWDO YHUVLRQ , RZQ WKH SULQW YHUVLRQ 1RWDWLRQV DQG FRQYHQWLRQV +RZ WR UHDG WKLV ERRN ,Q ZKLFK RUGHU VKRXOG , UHDG WKH FRQWHQW LQ WKLV ERRN" :K\ DUH VRPH FKDSWHUV DQG VHFWLRQV PDUNHG ZLWK ´DGYDQFHGµ" :K\ DUH VRPH FKDSWHUV PDUNHG ZLWK ´ERQXVµ" , RZQ D GLJLWDO YHUVLRQ +RZ GR , VXEPLW IHHGEDFN DQG FRUUHFWLRQV" +RZ GR , JHW XSGDWHV IRU WKH GRZQORDGV , ERXJKW DW 3D\KLS" &DQ , XSJUDGH IURP SDFNDJH ´(ERRNVµ WR SDFNDJH ´(ERRNV H[

HUFLVHV TXL]]HVµ"

, RZQ WKH SULQW YHUVLRQ &DQ , JHW D GLVFRXQW IRU D GLJLWDO YHUVLRQ" &DQ , VXEPLW DQ HUURU RU VHH VXEPLWWHG HUURUV" ,V WKHUH DQ RQOLQH OLVW ZLWK WKH 85/V LQ WKLV ERRN" 1RWDWLRQV DQG FRQYHQWLRQV :KDW LV D W\SH VLJQDWXUH" :K\ DP , VHHLQJ VWDWLF W\SHV LQ WKLV ERRN" :KDW GR WKH QRWHV ZLWK LFRQV PHDQ"

5HDGLQJ LQVWUXFWLRQV

([WHUQDO FRQWHQW 7LS

4XHVWLRQ

:DUQLQJ 'HWDLOV ([HUFLVH 4XL] &KDSWHU +LVWRU\ DQG HYROXWLRQ RI -DYD6FULSW &RQWHQWV +RZ -DYD6FULSW ZDV FUHDWHG 6WDQGDUGL]LQJ -DYD6FULSW 7LPHOLQH RI (&0$6FULSW YHUVLRQV (FPD 7HFKQLFDO &RPPLWWHH 7& 7KH 7& SURFHVV )$4 7& SURFHVV (YROYLQJ -DYD6FULSW 'RQ·W EUHDN WKH ZHE +RZ -DYD6FULSW ZDV FUHDWHG 6WDQGDUGL]LQJ -DYD6FULSW 7LPHOLQH RI (&0$6FULSW YHUVLRQV (FPD 7HFKQLFDO &RPPLWWHH 7& 7KH 7& SURFHVV 7LS 7KLQN LQ LQGLYLGXDO IHDWXUHV DQG VWDJHV QRW (&0$6FULSW

YHUVLRQV

)$4 7& SURFHVV

Stage 0: strawmanStage 1: proposalStage 2: draftStage 3: candidateStage 4: finishedPick championsFirst spec text, 2 implementationsSpec completeTest 262 acceptance testsReview at TC39 meetingTC39 helpsLikely to be standardizedDone, needs feedback from implementationsReady for standardizationSketch

+RZ LV >P\ IDYRULWH SURSRVHG IHDWXUH@ GRLQJ" ,V WKHUH DQ RIÀFLDO OLVW RI (&0$6FULSW IHDWXUHV" (YROYLQJ -DYD6FULSW 'RQ·W EUHDN WKH ZHE 4XL] &KDSWHU

1HZ -DYD6FULSW IHDWXUHV

&RQWHQWV 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 6RXUFH RI WKLV FKDSWHU 1HZ LQ (&0$6FULSW

0RUH IHDWXUHV PD\ VWLOO EH DGGHG WR (6

1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 1HZ LQ (&0$6FULSW 6RXUFH RI WKLV FKDSWHU &KDSWHU )$4 -DYD6FULSW &RQWHQWV :KDW DUH JRRG UHIHUHQFHV IRU -DYD6FULSW" +RZ GR , ÀQG RXW ZKDW -DYD6FULSW IHDWXUHV DUH VXSSRUWHG ZKHUH" :KHUH FDQ , ORRN XS ZKDW IHDWXUHV DUH SODQQHG IRU -DYD6FULSW" :K\ GRHV -DYD6FULSW IDLO VLOHQWO\ VR RIWHQ" :K\ FDQ·W ZH FOHDQ XS -DYD6FULSW E\ UHPRYLQJ TXLUNV DQG RXWGDWHG

IHDWXUHV"

+RZ FDQ , TXLFNO\ WU\ RXW D SLHFH RI -DYD6FULSW FRGH" :KDW DUH JRRG UHIHUHQFHV IRU -DYD6FULSW" +RZ GR , ÀQG RXW ZKDW -DYD6FULSW IHDWXUHV DUH VXS

SRUWHG ZKHUH"

:KHUH FDQ , ORRN XS ZKDW IHDWXUHV DUH SODQQHG IRU -DYD6FULSW" :K\ GRHV -DYD6FULSW IDLO VLOHQWO\ VR RIWHQ" :K\ FDQ·W ZH FOHDQ XS -DYD6FULSW E\ UHPRYLQJ TXLUNV

DQG RXWGDWHG IHDWXUHV"

+RZ FDQ , TXLFNO\ WU\ RXW D SLHFH RI -DYD6FULSW FRGH"

3DUW ,,

)LUVW VWHSV &KDSWHU

8VLQJ -DYD6FULSW WKH ELJ SLFWXUH

&RQWHQWV :KDW DUH \RX OHDUQLQJ LQ WKLV ERRN" 7KH VWUXFWXUH RI EURZVHUV DQG 1RGHMV -DYD6FULSW UHIHUHQFHV )XUWKHU UHDGLQJ :KDW DUH \RX OHDUQLQJ LQ WKLV ERRN" 7KH VWUXFWXUH RI EURZVHUV DQG 1RGHMV

JavaScript enginePlatform core

JS standard

library

Platform API

-DYD6FULSW UHIHUHQFHV )XUWKHU UHDGLQJ &KDSWHU

6\QWD[

&RQWHQWV $Q RYHUYLHZ RI -DYD6FULSW·V V\QWD[ $GYDQFHG ,GHQWLÀHUV 6WDWHPHQW YV H[SUHVVLRQ $PELJXRXV V\QWD[ 6HPLFRORQV $XWRPDWLF VHPLFRORQ LQVHUWLRQ $6, 6HPLFRORQV EHVW SUDFWLFHV 6WULFW PRGH YV VORSS\ PRGH $Q RYHUYLHZ RI -DYD6FULSW·V V\QWD[ %DVLF FRQVWUXFWV &RPPHQWV

DWRPLF YDOXHV

%RROHDQV

1XPEHUV

%LJLQWV

6WULQJV

$VVHUWLRQV /RJJLQJ WR WKH FRQVROH 2SHUDWRUV 'HFODULQJ YDULDEOHV 2UGLQDU\ IXQFWLRQ GHFODUDWLRQV $UURZ IXQFWLRQ H[SUHVVLRQV 3ODLQ REMHFWV $UUD\V &RQWURO ÁRZ VWDWHPHQWV 0RGXOHV &ODVVHV ([FHSWLRQ KDQGOLQJ /HJDO YDULDEOH DQG SURSHUW\ QDPHV &DVLQJ VW\OHV &DSLWDOL]DWLRQ RI QDPHV 0RUH QDPLQJ FRQYHQWLRQV :KHUH WR SXW VHPLFRORQV"

4XL] EDVLF

$GYDQFHG ,GHQWLÀHUV 9DOLG LGHQWLÀHUV YDULDEOH QDPHV HWF 5HVHUYHG ZRUGV 6WDWHPHQW YV H[SUHVVLRQ :H SUHWHQG WKHUH DUH RQO\ VWDWHPHQWV DQG H[SUHVVLRQV 6WDWHPHQWV ([SUHVVLRQV :KDW LV DOORZHG ZKHUH" $PELJXRXV V\QWD[ 6DPH V\QWD[ IXQFWLRQ GHFODUDWLRQ DQG IXQFWLRQ H[SUHVVLRQ 6DPH V\QWD[ REMHFW OLWHUDO DQG EORFN 'LVDPELJXDWLRQ 6HPLFRORQV 5XOH RI WKXPE IRU VHPLFRORQV 6HPLFRORQV FRQWURO VWDWHPHQWV $XWRPDWLF VHPLFRORQ LQVHUWLRQ $6, $6, WULJJHUHG XQH[SHFWHGO\ $6, XQH[SHFWHGO\ QRW WULJJHUHG ([DPSOH ([DPSOH ([DPSOH 6HPLFRORQV EHVW SUDFWLFHV 6WULFW PRGH YV VORSS\ PRGH 6ZLWFKLQJ RQ VWULFW PRGH ,PSURYHPHQWV LQ VWULFW PRGH 6ORSS\ PRGH SLWIDOO FKDQJLQJ DQ XQGHFODUHG YDULDEOH FUHDWHV D JOREDO YDUL DEOH )XQFWLRQ GHFODUDWLRQV DUH EORFNVFRSHG LQ VWULFW PRGH IXQFWLRQVFRSHG LQ

VORSS\ PRGH

6ORSS\ PRGH GRHVQ·W WKURZ H[FHSWLRQV ZKHQ FKDQJLQJ LPPXWDEOH GDWD )XUWKHU UHDGLQJ VORSS\ PRGH

4XL] DGYDQFHG

&KDSWHU &RQVROHV LQWHUDFWLYH -DYD6FULSW

FRPPDQG OLQHV

&RQWHQWV 7U\LQJ RXW -DYD6FULSW FRGH 7KH$3, SULQWLQJ GDWD DQG PRUH 7U\LQJ RXW -DYD6FULSW FRGH %URZVHU FRQVROHV 7KH 1RGHMV 5(3/

5HDGLQJ 5(3/ LQWHUDFWLRQV

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

H[HUFLVHV

&RQWHQWV 4XL]]HV ([HUFLVHV 8QLW WHVWV LQ -DYD6FULSW 4XL]]HV ([HUFLVHV ,QVWDOOLQJ WKH H[HUFLVHV 5XQQLQJ H[HUFLVHV 8QLW WHVWV LQ -DYD6FULSW $ W\SLFDO WHVW 3DUW WKH FRGH 3DUW WKH WHVWV 'RQ·W ZRUU\ DERXW WKH H[DFW GHWDLOV RI WHVWV ([HUFLVH 5HDGLQJ $V\QFKURQLFLW\ YLD FDOOEDFNV $V\QFKURQLFLW\ YLD 3URPLVHV $V\QF IXQFWLRQV DV WHVW ´ERGLHVµ

3DUW ,,,

9DULDEOHV DQG YDOXHV

&KDSWHU

9DULDEOHV DQG DVVLJQPHQW

&RQWHQWV 'HFLGLQJ EHWZHHQDQG 7KH VFRSH RI D YDULDEOH $GYDQFHG 7HUPLQRORJ\ VWDWLF YV G\QDPLF *OREDO YDULDEOHV DQG WKH JOREDO REMHFW 'HFODUDWLRQV VFRSH DQG DFWLYDWLRQ &ORVXUHVquotesdbs_dbs14.pdfusesText_20

[PDF] learn javascript visually book pdf

[PDF] learn jquery pdf

[PDF] learn kotlin android free

[PDF] learn kotlin before java

[PDF] learn kotlin for java developers

[PDF] learn kotlin free pdf

[PDF] learn kotlin or java first

[PDF] learn kotlin vs java

[PDF] learn kotlin without java

[PDF] learn latex on overleaf

[PDF] learn lua in 15

[PDF] learn lua pdf

[PDF] learn lua roblox 2020

[PDF] learn oop php

[PDF] learn oops concepts in php