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Theelementisusedtocreateadrop-downlist.Theelementismostoftenusedinaform,tocollectuserinput.Thenameattributeisneeded ...
Step1)AddHTML:Example.
Theselectedattributeisabooleanattribute.Whenpresent,itspecifiesthatanoptionshouldbepre-selectedwhenthepageloads.Thepre-selectedoption ...
Theelementspecifiesalistofpre-definedoptionsforanelement.Userswillseeadrop-downlistofthepre-definedoptionsastheyinput ...
Thesizeattributespecifiesthenumberofvisibleoptionsinadrop-downlist.Ifthevalueofthesizeattributeisgreaterthan1,butlowerthanthetotal ...
Thevalueattributespecifiesthevaluetobesenttoaserverwhenaformissubmitted.Thecontentbetweentheopeningandclosingtagsis ...
2020年5月6日—HTML下拉式選單-,,標籤(tag).用來建立下拉式選單(dropdownmenu)，讓使用者可以從一堆選項中選擇出一個或 ...
4天前—如果不含value属性，则value值默认为元素中的文本。你可以在元素中设置一个selected属性以将其设置为页面加载完成时默认选中的元素。
2021年10月2日—Theelementhassomeuniqueattributesyoucanusetocontrolit,suchasmultipletospecifywhethermultipleoptionscanbeselected, ...