Video: Daim ntawv ua haujlwm yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kev piav qhia. A daim ntawv tsis muaj txiaj ntsig tshwj tsis yog qee qhov kev ua haujlwm yuav siv qhov chaw tom qab daim ntawv xa tuaj. Cov kev ua attribute yog siv los qhia rau tus browser seb nplooj ntawv twg (orscript) hu ib zaug nias "xa" khawm.
Tom qab ntawd, qhov kev txiav txim thiab txoj hauv kev yog dab tsi?
Txhais thiab siv The txoj kev attribute qhia tias yuav xa li cas daim ntawv -data (cov daim ntawv -cov ntaub ntawv raug xa mus rau nplooj ntawv tshwj xeeb hauv kev ua tus cwj pwm). Cov daim ntawv -cov ntaub ntawv tuaj yeem xa tuaj raws li URL hloov pauv (nrog txoj kev ="get") lossis raws li HTTP posttransaction (nrog txoj kev = "post").
Dab tsi yog qhov kev ua yeeb yam hauv daim ntawv cim npe? Cov tus cwj pwm yog siv los qhia qhov chaw nyob ntawm tus neeg rau zaub mov xa cov ntsiab lus ntawm cov daim ntawv . Thiab txoj kev tus cwj pwm yog siv los qhia lub npe ntawm txoj kev siv uas cov ntsiab lus xa mus rau lub server. Ntawm no, peb tau teeb tsa tus cwj pwm ntawm FORM tag rau kev ua .asp.
Ntxiv rau qhov no, daim ntawv yuav tsum tau ua?
Yog, lub daim ntawv yog xav tau kom muaj ib kev ua attribute hauv HTML4. Yog tias tsis muaj ib qho, nws siv lub daim ntawv ua thiab yog tias tsis tau teeb tsa, nws ua haujlwm rau theempty txoj hlua (ceeb toom koj tsis tuaj yeem teeb tsa qhov tseeb. kev ua toan khoob hlua hauv HTML5).
Dab tsi yog qhov txawv ntawm daim ntawv txais thiab xa ntawv?
Piv txwv li, Tau kev thov suav nrog tag nrho cov ntaub ntawv xav tau hauv URL. Thaum txoj kev yog Tau , tag nrho daim ntawv cov ntaub ntawv yog encoded rau hauv qhov URL, ntxiv rau qhov actionURL raws li cov lus nug string parameters. Nrog POST , daim ntawv dataappears nyob rau hauv cov lus lub cev ntawm HTTP thov.
Pom zoo:
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