Kuxazululiwe: okwehliswayo ku-html

Inkinga enkulu ehlobene nokwehla kwe-HTML ukuthi kungaba nzima ukuyenza ifinyeleleke kubantu abakhubazekile. Okwehliswayo kuvame ukufakwa ikhodi kusetshenziswa i-JavaScript, okungaba nzima kubafundi besikrini nobunye ubuchwepheshe obusizayo ukutolika. Ukwengeza, uma okwehliswayo kungenalebula ngokufanelekile noma kuchazwe, abasebenzisi bangase bangaqondi ukuthi okwehlayo kusetshenziselwa ini noma ukuthi basebenzisane kanjani nakho.

<select>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>

1. - Lo mugqa wekhodi udala imenyu eyehlayo. 2.Volvo- Lo mugqa wekhodi udala inketho kumenyu eyehlayo enenani elithi "volvo". 3.I-Saab- Lo mugqa wekhodi udala inketho kumenyu eyehlayo enenani elithi "saab". 4.Mercedes- Lo mugqa wekhodi udala inketho kumenyu eyehlayo enenani elithi "mercedes". 5.Audi- Lo mugqa wekhodi udala inketho kumenyu eyehlayo enenani elithi "audi". 6. - Lo mugqa wekhodi uvala imenyu eyehlayo futhi ukhombisa ukuthi zonke izinketho zengeziwe kuwo.

Luyini uhlu lokudonsela phansi

Uhlu lokudonsela phansi ku-HTML wuhlobo lwento yokufaka evumela umsebenzisi ukukhetha inketho eyodwa ohlwini lwezinketho ezichazwe ngaphambilini. Uhlu luvela lapho umsebenzisi echofoza kumcibisholo odonsela phansi eduze kwenkundla yokufaka. Inketho ekhethiwe ibe isikhonjiswa endaweni yokufaka. Uhlu oluya phansi luvame ukusetshenziswa uma kunezinketho eziningi okudingeka kukhethwe kuzo, njengokukhetha izwe noma isifunda ohlwini.

Uyenza kanjani imenyu eyehlayo

Ukudala imenyu eyehlayo ku-HTML kulula uma kuqhathaniswa. Nazi izinyathelo zokwenza eyodwa:

1. Qala ngokwakha a isici, esizoqukatha zonke izinketho zemenyu yakho eyehlayo. 2. Ngaphakathi kwe isici, engeza i ingxenye yento ngayinye kumenyu yakho. Qiniseka ukuthi ufaka isibaluli senani ngenketho ngayinye, njengoba lokhu kuzosetshenziselwa ukunquma ukuthi iyiphi inketho ekhethiwe lapho ifomu lithunyelwa.

3. Ukwenza okukodwa kokukhethwa kukho okukhethwe ngokuzenzakalela, engeza isibaluli esikhethiwe kuthegi yaleyo nketho. Lokhu kuzoqinisekisa ukuthi kubonakala njengokukhethiwe lapho ikhasi lilayisha.

4. Ekugcineni, engeza ilebula yemenyu yakho eyehlayo usebenzisa i- umaka onesibaluli esihlotshaniswayo sokuthi “for” ekhomba inani le-ID yesici sakho esikhethiwe (lokhu kufanele kuhambisane nalokho okusethayo esinyathelweni soku-1).