我想知道什么是选择选项值的好习惯.
例
<select name="select"> <option value="0-9">Sample</option> <option value="a-z">Sample</option> <option value="this is sample value">Sample</option> <option value="this-is-sample-value">Sample</option> <option value="this_is_sample_value">Sample</option> <option value="this & is | sample ** value">Sample</option> </select>
我在这里有点困惑选择值与输入文本和textarea一样
解决方法
对于可以在option元素的value属性中设置的数据类型,实际上没有任何限制.在HTML中具有特殊意义的字符当然需要由适当的实体(例如& amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; amp; ).
属性定义为包含CDATA：
<!ELEMENT OPTION - O (#PCDATA) -- selectable choice --> <!ATTLIST OPTION %attrs; -- %coreattrs,%i18n,%events -- selected (selected) #IMPLIED disabled (disabled) #IMPLIED -- unavailable in this context -- label %Text; #IMPLIED -- for use in hierarchical menus -- value CDATA #IMPLIED -- defaults to element content -- >
– http://www.w3.org/TR/html4/interact/forms.html#h-17.6
CDATA is a sequence of characters from
the document character set and may
include character entities. User
agents should interpret attribute
values as follows:
- Replace character entities with characters,
- Ignore line Feeds,
- Replace each carriage return or tab with a single space.
User agents may ignore leading and
trailing white space in CDATA
attribute values (e.g.,” myval ”
may be interpreted as “myval”).
Authors should not declare attribute
values with leading or trailing white
space.For some HTML 4 attributes with CDATA
attribute values,the specification
imposes further constraints on the set
of legal values for the attribute that
may not be expressed by the DTD.
– http://www.w3.org/TR/html4/types.html#type-cdata
该规范不对option元素的value属性强加额外的限制.
