4 Txoj Hauv Kev Luam Ntawv hauv Javascript

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4 Txoj Hauv Kev Luam Ntawv hauv Javascript
4 Txoj Hauv Kev Luam Ntawv hauv Javascript

Video: 4 Txoj Hauv Kev Luam Ntawv hauv Javascript

Video: 4 Txoj Hauv Kev Luam Ntawv hauv Javascript
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Hauv kev siv lub khoos phis tawj, Luam yog cov lus txib siv los tso saib qee yam ntawm cov ntawv ntawm lub vijtsam. Nws tuaj yeem siv los tso saib cov ntawv (hlua), qhov sib txawv, cov lej lossis lej lej. Ib qho ntawm thawj yam uas ntau tus programmer kawm paub yog yuav siv Luam Ntawv li cas los tsim qhov program uas qhia "Nyob Zoo Ntiaj Teb!". Tsis zoo li lwm hom lus programming, Javascript tau muab tso rau hauv lub vev xaib. Javascript tsis muaj cov ntawv sau yooj yim zoo li ntau yam lus ua. Txawm li cas los xij, muaj ntau txoj hauv kev koj tuaj yeem tso saib cov ntawv hauv HTML daim ntawv, lub qhov rai ceeb toom, lub console. Koj tseem tuaj yeem siv Javascript los luam tawm ntawm lub tshuab luam ntawv.

Cov kauj ruam

Txoj Kev 1 ntawm 4: Siv InnerHTML

Luam hauv Javascript Kauj Ruam 1
Luam hauv Javascript Kauj Ruam 1

Kauj Ruam 1. Ntaus <p id = hauv koj li ntaub ntawv HTML

Nov yog qhib HTML tag rau kab ntawv kab ntawv nrog tus lej tshwj xeeb.

Yog xav paub ntxiv yuav ua li cas sau HTML code, txheeb xyuas Yuav Ua Li Cas Tsim Lub Vev Xaib yooj yim nrog HTML

Luam hauv Javascript Kauj Ruam 2
Luam hauv Javascript Kauj Ruam 2

Kauj Ruam 2. Ntaus lub npe rau kab lus hauv kab lus hauv qab los ntawm>

Qhov no muab cov ntsiab lus kab lus tus lej uas tuaj yeem rov qab tau hauv Javascript. Piv txwv li,"

".

Koj kuj tseem tuaj yeem siv lwm cov ntawv HTML ntsiab lus, xws li lub taub hau {{kbd |

Luam hauv Javascript Kauj Ruam 3
Luam hauv Javascript Kauj Ruam 3

Kauj Ruam 3. Hom

tam sim tom qab"

tag.

Qhov no ntxiv qhov kaw tag rau kab lus qhib kab HTML

Luam hauv Javascript Kauj Ruam 4
Luam hauv Javascript Kauj Ruam 4

Kauj Ruam 4. Nias ↵ Enter

Qhov no ntxiv kab tshiab rau koj li HTML.

Luam hauv Javascript Kauj Ruam 5
Luam hauv Javascript Kauj Ruam 5

Kauj Ruam 5. Ntaus thiab nias ↵ Enter

Nov yog qhov qhib qhib rau koj Javascript. Txhua Javascript coding yuav tsum mus tom qab daim ntawv no.

Luam hauv Javascript Kauj Ruam 6
Luam hauv Javascript Kauj Ruam 6

Kauj Ruam 6. Ntaus ntawv document.getElementById

Nov yog tus lej javascript kom hu ib qho HTML los ntawm nws tus ID.

Luam hauv Javascript Kauj Ruam 7
Luam hauv Javascript Kauj Ruam 7

Kauj Ruam 7. Ntaus tus ID ntawm kab lus hauv kab lus hauv kab lus

Yog tias koj pawg lus yog"

", koj tus lej javascript yuav nyeem" document.getElementById ("lej") ".

Luam hauv Javascript Kauj Ruam 8
Luam hauv Javascript Kauj Ruam 8

Kauj Ruam 8. Hom. InnerHTML = tom qab kab lus

Cov lus txib no yog siv los tso saib cov ntawv sau siv lub ntsiab lus HTML.

Luam hauv Javascript Kauj Ruam 9
Luam hauv Javascript Kauj Ruam 9

Kauj Ruam 9. Ntaus yam koj xav luam ua ntej los ntawm tus lej cim (;

).

Koj tuaj yeem tso saib cov ntawv, qhov sib txawv, cov lej, lossis kev ua lej.

Piv txwv li, ntaus "document.getElementById (" demo "). InnerHTML = 27 + 33;" luam tawm cov lej ntawm 27 + 33

Luam hauv Javascript Kauj Ruam 10
Luam hauv Javascript Kauj Ruam 10

Kauj Ruam 10. Nias ↵ Enter thiab ntaus

Cov ntawv no kaw koj tus lej Javascript. Ntaus daim ntawv no thaum koj ua tiav sau tag nrho koj cov kab ntawm Javascript. Thaum koj thauj cov ntawv HTML hauv lub vev xaib, nws yuav luam tawm hauv cov ntawv HTML.

Txoj Kev 2 ntawm 4: Siv Qhov Tseeb Qhov Tseeb

Luam hauv Javascript Kauj Ruam 11
Luam hauv Javascript Kauj Ruam 11

Kauj ruam 1. Ntaus hauv koj lub cev ntawm koj daim ntawv HTML

Nov yog qhov qhib qhib rau koj Javascript.

Luam hauv Javascript Kauj Ruam 12
Luam hauv Javascript Kauj Ruam 12

Kauj Ruam 2. Nias ↵ Enter thiab ntaus ntawv ceeb toom

Nov yog javascript hais kom qhib lub qhov rai pop-up ceeb toom.

Luam hauv Javascript Kauj Ruam 13
Luam hauv Javascript Kauj Ruam 13

Kauj Ruam 3. Ntaus yam koj xav luam hauv kab lus

Koj tuaj yeem sau cov ntawv, qhov sib txawv, cov lej, lossis kev ua lej. Piv txwv li, "ceeb toom (" Nyob Zoo Sweety! ")" Los tso saib "Nyob Zoo Sweety!" nyob rau hauv lub qhov rai pop-up.

Luam hauv Javascript Kauj Ruam 14
Luam hauv Javascript Kauj Ruam 14

Kauj Ruam 4. Ntxiv ib nrab hnyuv (;

) thaum kawg.

Qhov no kaw koj kab ntawm Javascript. Tag nrho kab yuav tsum zoo ib yam li "ceeb toom (" Nyob Zoo Sweety! ");".

Luam hauv Javascript Kauj Ruam 15
Luam hauv Javascript Kauj Ruam 15

Kauj Ruam 5. Nias ↵ Enter thiab ntaus

Cov ntawv no kaw koj tus lej Javascript. Ntaus daim ntawv no thaum koj ua tiav nkag mus rau tag nrho koj cov kab ntawm Javascript. Thaum koj thauj koj cov ntawv HTML hauv lub vev xaib, nws yuav pom cov ntawv koj xav luam tawm hauv lub qhov rai qhib.

Koj tseem tuaj yeem tsim lub pob uas qhia cov ntawv luam tawm hauv lub qhov rai qhib. Txhawm rau ua qhov no, ntaus "Button text"

Txoj Kev 3 ntawm 4: Siv Console Log

Luam hauv Javascript Kauj Ruam 16
Luam hauv Javascript Kauj Ruam 16

Kauj Ruam 1. Ntaus hauv koj lub cev ntawm koj daim ntawv HTML

Nov yog qhov qhib qhib rau koj Javascript.

Luam hauv Javascript Kauj Ruam 17
Luam hauv Javascript Kauj Ruam 17

Kauj Ruam 2. Nias ↵ Enter thiab ntaus console.log

Nov yog javascript hais kom ua rau lub cav nkag. Lub cav cav yog qhov ze tshaj plaws rau Luam cov lus txib hauv qhov kev nkag siab zoo ib yam. Nws tsis tso saib cov ntawv ntawm koj lub vev xaib, tab sis nws tso tawm cov ntawv hauv lub console thaum koj khiav koj li HTML/Javascript hauv lub vev xaib. Qhov no muaj txiaj ntsig zoo rau kev debugging.

Luam hauv Javascript Kauj Ruam 18
Luam hauv Javascript Kauj Ruam 18

Kauj Ruam 3. Ntaus cov ntawv koj xav nkag rau hauv kab lus

Nws tuaj yeem yog cov ntawv (hlua), qhov sib txawv, cov lej, lossis kev ua lej. Piv txwv li, console.log (Kuv luam tawm hauv Javascript).

Luam hauv Javascript Kauj Ruam 19
Luam hauv Javascript Kauj Ruam 19

Kauj Ruam 4. Ntxiv ib nrab hnyuv (;

) thaum kawg.

Qhov no kaw koj kab ntawm Javascript. Tag nrho kab yuav tsum zoo ib yam li "nowiki> console.log (Kuv luam tawm hauv Javascript)

Luam hauv Javascript Kauj Ruam 20
Luam hauv Javascript Kauj Ruam 20

Kauj Ruam 5. Nias ↵ Enter thiab ntaus

Cov ntawv no kaw koj tus lej Javascript. Ntaus daim ntawv no thaum koj ua tiav nkag mus rau tag nrho koj cov kab ntawm Javascript.

Luam hauv Javascript Kauj Ruam 21
Luam hauv Javascript Kauj Ruam 21

Kauj Ruam 6. Txuag koj daim ntawv HTML

Siv cov theem hauv qab no kom txuag koj cov ntawv HTML.

  • Nyem Cov ntaub ntawv nyob rau sab saum toj ntawm koj cov ntawv sau lossis kho kom raug HTML.
  • Nyem Txuag raws li.
  • Ntaus lub npe ntawv rau daim ntawv HTML.
  • Xyuas kom nws txuag raws li ".html" cov ntaub ntawv.
  • Nyem Txuag.
Luam hauv Javascript Kauj Ruam 22
Luam hauv Javascript Kauj Ruam 22

Kauj Ruam 7. Qhib daim ntawv HTML hauv lub vev xaib

Qhib ib lub vev xaib browser uas koj xaiv thiab ntaus cov ntaub ntawv qhov chaw ntawm daim ntawv HTML hauv qhov chaw nyob bar saum toj. Qhov no yuav qhib cov ntawv HTML hauv koj lub vev xaib.

Luam hauv Javascript Kauj Ruam 23
Luam hauv Javascript Kauj Ruam 23

Kauj Ruam 8. Nias F12

Qhov no qhib Kev Tsim Tus Qauv hauv koj lub vev xaib. Koj yuav pom lub qhov rai tshiab nrog HTML, CSS, thiab Javascript code tso tawm.

Luam hauv Javascript Kauj Ruam 24
Luam hauv Javascript Kauj Ruam 24

Kauj Ruam 9. Nyem rau Console

Nws nyob rau sab saum toj ntawm tus tsim tawm lub qhov rai.

Luam hauv Javascript Kauj Ruam 25
Luam hauv Javascript Kauj Ruam 25

Kauj ruam 10. Hloov kho koj tus browser

Luam hauv Javascript Kauj Ruam 26
Luam hauv Javascript Kauj Ruam 26

Kauj ruam 1. Ntaus <khawm onclick = hauv lub cev ntawm koj daim ntawv HTML

Nov yog qhib HTML tag los tsim lub pob hauv koj li HTML.

Luam hauv Javascript Kauj Ruam 27
Luam hauv Javascript Kauj Ruam 27

Kauj Ruam 2. Ntaus "window.print ()"> tom qab sib npaug (=) kos npe

Qhov "window.print ()" hais kom ua yog Javascript hais kom luam cov ntsiab lus ntawm koj lub vev xaib browser. Lub bracket (>) ua tiav qhov qhib tag ntawm HTML khawm.

Luam hauv Javascript Kauj Ruam 28
Luam hauv Javascript Kauj Ruam 28

Kauj Ruam 3. Ntaus cov ntawv koj xav mus hauv lub pob

Qhov no yuav tsum yog mus tom qab tus zauv (>). Piv txwv li, koj tuaj yeem ntaus "Nyem qhov no luam tawm" lossis qee yam zoo sib xws.

Luam hauv Javascript Kauj Ruam 29
Luam hauv Javascript Kauj Ruam 29

Kauj Ruam 4. Hom

Qhov no kaw tawm lub ntsiab lus HTML khawm. Thaum koj ua koj li HTML hauv lub vev xaib, nws yuav tsim lub pob koj tuaj yeem nyem txhawm rau luam tawm cov ntsiab lus ntawm yoru web browser.

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