Below are some typical input limitations:
|
Attribute |
Description |
|
checked |
Indicates that an input field should be initially selected upon page loading (applicable to type=”checkbox” or type=”radio”). |
|
disabled |
Specifies that an input field should be inactive. |
|
max |
Specifies the upper limit for an input field’s value. |
|
maxlength |
Specifies the maximum character limit for an input field. |
|
min |
Specifies the lower limit for an input field’s value. |
|
pattern |
Specifies a regular expression for validating the input value. |
|
readonly |
Specifies that an input field is read-only and cannot be modified. |
|
required |
Specifies that an input field must be completed and cannot be left empty. |
|
size |
Specifies the width of an input field in terms of characters. |
|
step |
Specifies the allowable numeric intervals for an input field. |
|
value |
Specifies the initial value for an input field. |
In the next chapter, you’ll explore input restrictions. The example shows a numeric input field with values between 0 and 100, incremented by 10, and a default value of 30.
Example
|
<form> value=”30″> |