input-placeholder.md

feature: input[placeholder] status: use tags: gtie9 kind: html polyfillurls:Placeholder jQuery Plugin

Input placeholders are simply ignored in IE 9 and below. Note that they are only applied when the type of the input is text, password, search, tel, url, or email. Textareas can have placeholders, too. Otherwise, it is ignored.

Per the HTML specification:

The placeholder attribute represents a short hint (a word or short phrase) intended to aid the user with data entry. A hint could be a sample value or a brief description of the expected format. The placeholder attribute should not be used as an alternative to a label.

A properly implemented form should have labels and any placeholders should be supplementary. As such, they are not required for successful completion of a form and use of a polyfill is often unwarranted.