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Introduction to html5 forms, select drop-down, and textarea multi-line text
Introduction to html5 forms, select drop-down, and textarea multi-line text
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Release： 2017-06-17 14:34:01
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attributes under the drop-down
##name In fact, if there is a name, then there is a value, because the button is submitted in the format of name=value. If you do not write the value, what is submitted will be the
string# of the option.
## is actually similar to the
list
of input, both require option and value can be omitted, but assignment is generally used for database storage and Call. The database is more efficient for numeric index
##size No need to pull down, it seems Taobao sellers select the same product category list...
optgroup This is not an attribute, it is just a node with multiple layers of options. There are many tags used to divide nodes in this way. For example, hgroup is used to organize titles, and
optgroup is used to organize data classification. Of course, this is only for performance, and the actual classification is still in the database.
三三Group
, this is the combined force of optgroup and label.
multiple Multiple selection After it is true, you can press ctrl to select multiple lines
## is actually similar to the 
Group
