Limit number of characters allowed in form input text field

Question

How do I limit or restrict the user to only enter a maximum of five characters in the textbox   Below is the input field as part of my form    lt input type  text  id  sessionNo  name  sessionNum    gt    Is it using something like maxSize or something like that

User · Answer

You can use  lt input type    text  maxlength  9  gt  or   lt input type    number  maxlength  9  gt  for numbers or  lt input type    email  maxlength  9  gt  for email validation will show up

User · Answer

Add the following to the header    lt script language  javascript  type  text javascript  gt  function limitText limitField  limitNum        if  limitField value length  gt  limitNum            limitField value   limitField value substring 0  limitNum            lt  script gt        lt input type  text  id  sessionNo  name  sessionNum  onKeyDown  limitText this 5     onKeyUp  limitText this 5       gt

User · Answer

Use maxlenght  number of charcters    lt input type  text  id  sessionNo  name  sessionNum  maxlenght  7    gt

User · Answer

maxlength      The maximum number of characters that will be accepted as input  This can be greater that specified by SIZE   in which case the field   will scroll appropriately  The default is unlimited     lt input type  text  maxlength  2  id  sessionNo  name  sessionNum  onkeypress  return isNumberKey event     gt    However  this may or may not be affected by your handler  You may need to use or add another handler function to test for length  as well

User · Answer

Maxlength  The maximum number of characters that will be accepted as input   The maxlength attribute specifies the maximum number of characters allowed in the  element   Maxlength W3 schools   lt form action   action page php  gt      Username   lt input type  text  name  usrname  maxlength  5  gt  lt br gt       lt input type  submit  value  Submit  gt   lt  form gt

User · Answer

Make it simpler   lt input type  text  maxlength  3    gt    and use an alert to show that max chars have been used

User · Answer

I alway do it like this    document  ready function    var maxChars      quot  sessionNum quot    var max length   maxChars attr  maxlength    if  max length  gt  0        maxChars on  keyup   function e           length   new Number maxChars val   length           counter   max length-length             quot  sessionNum counter quot   text counter                  Input   lt input name  quot sessionNum quot  id  quot sessionNum quot  maxlength  quot 5 quot  type  quot text quot  gt  Number of chars   lt span id  quot sessionNum counter quot  gt 5 lt  span gt

User · Answer

lt input type  text  maxlength  5  gt    the maximum amount of letters that can be in the input is 5

User · Answer

The simplest way to do so   maxlength  5    So   Adding this attribute to your control    lt input type  text       id  sessionNo       name  sessionNum       onkeypress  return isNumberKey event        maxlength  5    gt

User · Answer

The following code includes a counted      x000D   x000D  var count   1  x000D   x000D  do   x000D      function count down obj  count   x000D   x000D      let element   document getElementById  count   count   x000D   x000D      element innerHTML   80 - obj value length  x000D   x000D      if 80 - obj value length  lt  5   x000D          element style color    firebrick   x000D       else  x000D          element style color     333   x000D        x000D    x000D  count    x000D    while  count  lt  20    x000D   text-input   x000D      padding  8px 16px  x000D      width  50   x000D      margin-bottom  5px  x000D      margin-top  10px  x000D      font-size  20px  x000D      font-weight  700  x000D      font-family  Raleway  x000D      border  1px solid dodgerblue  x000D      x000D   lt p gt  lt input placeholder  Title  id  bike-input-title  onkeyup  count down this  3   maxlength  80   class  text-input  name  bikeTitle   gt  lt  p gt  x000D           lt span id  count3  style  float  right  font-family  Raleway  font-size 20px  font-weight 600  margin-top -5px   gt 80 lt  span gt  lt br gt  x000D   x000D   x000D

User · Answer

lt input type  text  name  MobileNumber  id  MobileNumber  maxlength  10  onkeypress  checkNumber event     placeholder  MobileNumber  gt    lt script gt  function checkNumber key      console log key     var inputNumber   document querySelector   MobileNumber   value    if key key  gt   0  amp  amp  key key  lt   9        inputNumber    key key        else       key preventDefault           lt  script gt

User · Answer

According to w3c  the default value for the MAXLENGTH attribute is an unlimited number  So if you don t specify the max a user could cut and paste the bible a couple of times and stick it in your form   Even if you do specify the MAXLENGTH to a reasonable number make sure you double check the length of the submitted data on the server before processing  using something like php or asp  as it s quite easy to get around the basic MAXLENGTH restriction anyway

User · Answer

lt input type  number  id  xxx  name  xxx  oninput  maxLengthCheck this   maxlength  10  gt   function maxLengthCheck object      if  object value length  gt  object maxLength    object value   object value slice 0  object maxLength

[html] Limit number of characters allowed in form input text field

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