HTML Field Validation

(1) Connect remove underline: style= "Text-decoration:none"

style= "Text-decoration:none"> This is a link! </a>

(2) text box input when prompted to enter the content: autocomplete= "On", do not prompt: autocomplete= "off"

AutoComplete should protect user-sensitive data against unsafe storage by local browsers.

<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >autocomplete= "on" autocomplete= "Off" /><br/><input type= "Submit"/></form></body>
(3) text box prompt message: placeholder= "prompt Message"
Display descriptive descriptive text or informational messages to the user
placeholder= "Please enter your name" /></p></body>
(4) provides selectable list contents for input controls: list,datalist
Control property list= "Datalist.id"
<datalist>
<option lable= "xxxx" value= "xxxxxx"/>
......
</datalist>
list= "url_list" name= "link" style= "width:250px"/><DataList id= "url_list ">    <option label=" W3school "value=" http://www.w3school.com.cn "/> <option    label="Google "value="http://www.google.com"/>    <option label=" Microsoft "value="/HTTP/ www.microsoft.com "/></datalist></body>
(5) Required fields verification: required:required="required"
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >formrequired= "required" /><input type= "Submit" value= "commit"/></  Form></body>
(6) Regular match: pattern= "Regular expression"
pattern= "[A-z]{3}" title= "Please enter the three-letter city Code" /><input type= "Submit" value= "Submit"/></form></ Body>
(7) Email verification: type="Email"
type= "Email " name= "email" required= "required"/><input type= "Submit" value= "Submit"/></form> </body>
(8) field length limit: min= "", max= ""
min= "0" max= " required=" required "/><input type=" Submit "value=" Submit "/></form></body >
(9) Verify that two times the password is consistent: Customerror
This need to use the knowledge of JS, follow-up supplement
(10) text box can only enter numeric value: type= "Number"
A single digital validation input can be typed, but if it is other combinations of allowable input numbers and letters, you need to use regular expressions to qualify
type= "number" id= "number" name= "number" min= "6" max= "8" required= "required"/><input type= "Submit" Value= "Submit"/></form></body>
HTML Field Validation