HTML <meter> 标籤
Pagsasakop at paggamit
<meter>
Tag na nagtatakan ng scalar measurement value sa kilalang saklaw, o fraction value. Tinatawag din na instrument (gauge).
Halimbawa: paggamit ng disk, kaugnayan ng mga resulta ng paghahanap at iba pa.
Babala:Huwag gamitin <meter>
Tag upang ipakita ang progreso (halimbawa, progress bar). Para sa progress bar, gamitin <progress> Tag.
Mga payo:Palaging gamitin <label> TagPara sa pinakamahusay na praktika ng pag-accessibility!
Tingnan din:
Manwal ng HTML DOM:Objekto ng Meter
Halimbawa
Gamitin ang elementong meter upang ipakita ang scalar value sa saklaw na binigay (instrument):
<label for="disk_c">Disk usage C:</label> <meter id="disk_c" value="2" min="0" max="10">Dapat lamang dalawa</meter><br> <label for="disk_d">Disk usage D:</label> <meter id="disk_d" value="0.6">60%</meter>
Atribute
Atribute | Halaga | Paglalarawan |
---|---|---|
form | Id ng form | Tinatakan kung saan ang elementong <meter> ay nasa form. |
high | Digital | Tinatakan ang pinakamataas na halaga ng saklaw. |
mababa | Digital | Tinatakan ang pinakamababang halaga ng saklaw. |
mataas | Digital | Tinatakan ang pinakamataas na halaga ng saklaw. |
mababang | Digital | Tinatakan ang pinakamaliit na halaga ng saklaw. Ang default na halaga ay 0. |
โครงสร้างที่กำหนดค่า ที่มีค่าที่สูงกว่านี้ถือว่าเกินค่า | Digital | Tinatakan ang pinakamainam na halaga ng alat. |
halaga | Digital | Mga kinakailangan. Tinatakan ang kasalukuyang halaga ng alat. |
Paliwanag
Ang elementong meter ay nagpapakita ng isang posibleng halaga sa isang saklaw.mababang at mataas Ang pagtatakda ng halaga ng posibleng saklaw ng halaga ay nagtatakda ng hangganan, sila ay maaaring ipakita sa pamamagitan ng floating-point number. Ang pagpapakita ng elementong meter ay maaaring hatiin sa tatlong bahagi: mababa, mataas at pinakamainam.mababa Ang pagtatakda ng halaga ay nagtatakda ng isang halaga, ang lahat ng halaga sa ilalim ay tinuturing na mababa;high highโครงสร้างที่กำหนดค่า ที่มีค่าที่สูงกว่านี้ถือว่าเกินค่า optimum
โครงสร้างที่กำหนดค่าที่ดีที่สุด
<meter>
แบบนี้ยังสนับสนุน เครื่องมือที่ใช้งานเหมือน HTML.
เครื่องมือที่ใช้งานเหมือน HTML
<meter>
แบบนี้ยังสนับสนุน เครื่องมือที่ใช้งานเหมือน HTML.
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Chrome | Edge | Firefox | Safari | Opera |
---|---|---|---|---|
Chrome | Edge | Firefox | Safari | Opera |
8.0 | 13.0 | 16.0 | 6.0 | 11.5 |