Bug 50952

Following is from the spec: 4.10.7.1.2 Text state and Search state When an input element's type attribute is in the Text state or the Search state, the rules in this section apply. The input element represents a one line plain text edit control for the element's value. The difference between the Text state and the Search state is primarily stylistic: on platforms where search fields are distinguished from regular text fields, the Search state might result in an appearance consistent with the platform's search fields rather than appearing like a regular text field. If the element is mutable, its value should be editable by the user. User agents must not allow users to insert U+000A LINE FEED (LF) or U+000D CARRIAGE RETURN (CR) characters into the element's value. If the element is mutable, the user agent should allow the user to change the writing direction of the element, setting it either to a left-to-right writing direction or a right-to-left writing direction. If the user does so, the user agent must then run the following steps: Set the element's dir attribute to "ltr" if the user selected a left-to-right writing direction, and "rtl" if the user selected a right-to-left writing direction. Queue a task to first fire a simple event that bubbles named input at the input element, and to then broadcast forminput events from the input element's form owner, if any. The value attribute, if specified, must have a value that contains no U+000A LINE FEED (LF) or U+000D CARRIAGE RETURN (CR) characters. The value sanitization algorithm is as follows: Strip line breaks from the value. The following common input element content attributes, IDL attributes, and methods apply to the element: autocomplete, dirname, list, maxlength, pattern, placeholder, readonly, required, and size content attributes; list, selectedOption, selectionStart, selectionEnd, and value IDL attributes; select() and setSelectionRange() methods. The value IDL attribute is in mode value. The input and change events apply. The following content attributes must not be specified and do not apply to the element: accept, alt, checked, formaction, formenctype, formmethod, formnovalidate, formtarget, height, max, min, multiple, src, step, and width. The following IDL attributes and methods do not apply to the element: checked, files, valueAsDate, and valueAsNumber IDL attributes; stepDown() and stepUp() methods.