Open Bug 1422185 Opened 2 years ago Updated Last year
Date and Time Inputs show default placeholder text in solid black and cannot be formatted by CSS pseudo-elements ::placeholder/::-moz-placeholder
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0 Build ID: 20171112125346 Steps to reproduce: Create a date or time input. Attempt to set a placeholder HTML attribute. Then attempt to format placeholder text with CSS pseudo-elements ::-moz-placeholder or ::placeholder. Actual results: The date and time inputs have read-only placeholders in solid black. Expected results: At a minimum, a developer should be able to format the default placeholder via CSS pseudo-elements ::placeholder or ::-moz-placeholder. Right now the way to format the placeholder is provided by formatting the input element itself. Formatting the input element should only apply to the placeholder text upon entering any data to the input. At the point, the semantic meaning of the placeholder text changes to become part of the data itself. By specifying the type of an input element to be date or time, it's understandable that the HTML placeholder attribute can not be set as this is part of the functionality of those inputs. However something else that should also be changed is the default formatting of the placeholder, which should be opacity: 0.54.
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