大寫L

<input type = "text" maxLength = "4" />

maxLength

accept acceptCharset accessKey action allowFullScreen allowTransparency alt

async autoComplete autoFocus autoPlay capture cellPadding cellSpacing challenge

charSet checked cite classID className colSpan cols content contentEditable

contextMenu controls coords crossOrigin data dateTime default defer dir

disabled download draggable encType form formAction formEncType formMethod

formNoValidate formTarget frameBorder headers height hidden high href hrefLang

htmlFor httpEquiv icon id inputMode integrity is keyParams keyType kind label

lang list loop low manifest marginHeight marginWidth max maxLength media

mediaGroup method min minLength multiple muted name noValidate nonce open

optimum pattern placeholder poster preload profile radioGroup readOnly rel

required reversed role rowSpan rows sandbox scope scoped scrolling seamless

selected shape size sizes span spellCheck src srcDoc srcLang srcSet start step

style summary tabIndex target title type useMap value width wmode wrap