Set maxlength in Html Textarea

Question

How can I set the maxlength in a textarea  And why maxlength is not working  properly in textarea

User · Answer

resize none  This property fix your text area and bound it  you use this css property id your textarea gave text area an id and on the behalf of that id you can use this css property

User · Answer

Before HTML5 it s only possible to check this with JavaScript or by a server-side verification  better  because JavaScript obviously only works with JavaScript enabled      There is no native max-length attribute for textareas   Since HTML5 it s a valid attribut  so defining your doctype as HTML5 may help  I don t know if all browsers support this attribute  though    lt  DOCTYPE html gt

User · Answer

Before HTML5  we have an easy but workable way  Firstly set an maxlength attribute in the textarea element    lt textarea maxlength  250  name    gt  lt  textarea gt      Then use JavaScript to limit user input     function              textarea maxlength    bind  input propertychange   function               var maxLength     this  attr  maxlength              if    this  val   length  gt  maxLength                    this  val   this  val   substring 0  maxLength                                 Make sure the bind both  input  and  propertychange  events to make it work on various browsers such as Firefox Safari and IE

User · Answer

simple way to do maxlength for textarea in html4 is    lt textarea cols  60  rows  5  onkeypress  if  this value length  gt  100    return false     gt  lt  textarea gt    Change the  100  to however many characters you want

User · Answer

As I said in a comment to aqingsao s answer  it doesn t quite work when the textarea has newline characters  at least on Windows   I ve change his answer slightly thus     function            textarea maxlength    bind  input propertychange   function             var maxLength     this  attr  maxlength              I m guessing JavaScript is treating a newline as one character rather than two so when I try to insert a  max length  string into the database I get an error            Detect how many newlines are in the textarea  then be sure to count them twice as part of the length of the input          var newlines      this  val   match   n g         length         if    this  val   length   newlines  gt  maxLength                  this  val   this  val   substring 0  maxLength - newlines                           Now when I try to paste a lot of data in with newlines  I get exactly the right number of characters

User · Answer

try this    function         textarea maxlength         keydown function event          return    this  attr  maxlength      this value length  lt    this  attr  maxlength      event keyCode    8    event keyCode    46              keyup function event         var limit     this  attr  maxlength           if   limit  return         if  this value length  lt   limit  return true        else           this value   this value substr 0 limit           return false                            For me works really perfect without jumping showing additional characters  works exactly like maxlength on input

User · Answer

function            id   keypress function           var maxlen   100      if    this  val   length  gt  maxlen            return false

User · Answer

lt p gt      lt textarea id  msgc  onkeyup  cnt event   rows  1  cols  1  gt  lt  textarea gt    lt  p gt    lt p id  valmess2  style  color red   gt  lt  p gt   function cnt event      document getElementById  valmess2   innerHTML        init and clear if b  lt  max      allowed character    a   document getElementById  msgc   value    b   a length    if  b  gt  400          document getElementById  valmess2   innerHTML  the max length of 400 characters is  reached  you typed in      b    characters             maxlength is only valid for HTML5  For HTML XHTML you have to use JavaScript and or PHP  With PHP you can use strlen for example This example indicates only the max length  it s NOT blocking the input

User · Answer

If you are using HTML 5  you need to specify that in your DOCTYPE declaration   For a valid HTML 5 document  it should start with    lt  DOCTYPE html gt      Before HTML 5  the textarea element did not have a maxlength attribute   You can see this in the DTD spec    lt  ELEMENT TEXTAREA - -   PCDATA        -- multi-line text field -- gt   lt  ATTLIST TEXTAREA    attrs                               --  coreattrs   i18n   events --   name        CDATA           IMPLIED   rows        NUMBER          REQUIRED   cols        NUMBER          REQUIRED   disabled     disabled       IMPLIED  -- unavailable in this context --   readonly     readonly       IMPLIED   tabindex    NUMBER          IMPLIED  -- position in tabbing order --   accesskey    Character      IMPLIED  -- accessibility key character --   onfocus      Script         IMPLIED  -- the element got the focus --   onblur       Script         IMPLIED  -- the element lost the focus --   onselect     Script         IMPLIED  -- some text was selected --   onchange     Script         IMPLIED  -- the element value was changed --    reserved                            -- reserved for possible future use --    gt    In order to limit the number of characters typed into a textarea  you will need to use javascript with the onChange event  You can then count the number of characters and disallow further typing   Here is an in-depth discussion on text input and how to use server and client side scripting to limit the size   Here is another sample

[html] Set maxlength in Html Textarea

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