HTML 5 - Chapter 6 - HTML 5 form attributes (required, pattern, placeholder, Step, Height, Width)
HTML 5 form attributes Part 2 (required, pattern, placeholder, Step, Height, Width)
required :
The required attribute specifies that an input field must be filled out before submitting the form.
The required attribute works with the following input types: text, search, url, tel, email, password, date pickers, number, checkbox, radio, and file.
pattern :
The pattern attribute specifies a regular expression that the input element's value is checked against.
The pattern attribute works with the following input types: text, search, url, tel, email, and password.
placeholder :
The placeholder attribute specifies a hint that describes the expected value of an input field
The hint is displayed in the input field before the user enters a value.
The placeholder attribute works with the following input types: text, search, url, tel, email, and password.
step :
The step attribute specifies the legal number intervals for an input element.
Example: if step="3", legal numbers could be -3, 0, 3, 6, etc.
The step attribute works with the following input types: number, range, date, datetime-local, month, time and week.
Height and Width :
The height and width attributes specify the height and width of an
input type="image" element.
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