Like the new input types, it is generally safe to use these attributes today, whether or not your target browser supports them. This is because the attributes will be safely ignored by any browser on the market today if the browser does not understand them.
The placeholder Attribute
The placeholder attribute gives input controls an easy way to provide descriptive, alternate hint text which is shown only when the user has not yet entered any values. This is common in many modern user interface frameworks, and popular JavaScript frameworks have also provided emulation of this feature. However, modern browsers have it built-in.
To use this attribute, simply add it to an input with a text representation. This includes the basic text type, as well as the semantic types such as email, number, url, etc.
<label>Examiner: <input name=”name” placeholder=”First Name” required></label>
In a supporting browser, such as Google Chrome, this causes the field to display a faint version of the placeholder text which will disappear whenever the user or application puts focus into the field, or whenever there is a value present.
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