HTML Checking for Large Sites
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Attribute “placeholder” is only allowed when the input type is “email”, “number”, “password”, “search”, “tel”, “text”, or “url”.
The placeholder
attribute is used on <input>
elements as text that appears in the form control when it has no value set. Only inputs of type email
, number
, password
, search
, tel
, text
, or url
accept this attribute.
For example, an input of type hidden
doesn’t accept a placeholder
attribute as it makes no sense to specify text to appear when the input is empty, if that input is hidden.
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