Why does the html input with type number allow the letter e to be entered in the field

Question

I have the following html5 input element    lt input type  number  gt    Why does this input allow for the character  e  to be entered in the input field  No other alphabet character is able to be entered  as expected   Using chrome v  44 0 2403 107  To see what I mean  http   www w3schools com html tryit asp filename tryhtml input number

User · Accepted Answer

Because that s exactly how the spec says it should work  The number input can accept floating-point numbers  including negative symbols and the e or E character  where the exponent is the number after the e or E       A floating-point number consists of the following parts  in exactly   the following order          Optionally  the first character may be a  -  character    One or more characters in the range  0   9     Optionally  the following parts  in exactly the following order          a     character   one or more characters in the range  0   9       Optionally  the following parts  in exactly the following order          a  e  character or  E  character   optionally  a  -  character or     character   One or more characters in the range  0   9

User · Answer

Angular  with IDE keyCode deprecated warning  Functionally the same as rinku s answer but with IDE warning prevention  numericOnly event   boolean          noinspection JSDeprecatedSymbols     const charCode    event which    event which   event key    event keyCode      keyCode is deprecated but needed for some browsers     return   charCode     101    charCode     69    charCode     45    charCode     43

User · Answer

A simple solution to exclude everything but integer numbers  x000D   x000D   lt input       type  number      min  1       step  1      onkeypress  return event keyCode     8    event charCode  gt   48  amp  amp  event charCode  lt   57  gt  x000D   x000D   x000D

User · Answer

Using angular  You can do this to restrict to enter e   - E    lt input type  number    keypress   numericOnly  event    gt      numericOnly event   boolean      restrict e   - E characters in  input type number     debugger     const charCode    event which    event which   event keyCode      if  charCode    101    charCode    69    charCode    45    charCode    43          return false            return true

User · Answer

lt input type  number  onkeydown  return FilterInput event   onpaste  handlePaste event     gt   function FilterInput event        var keyCode     which  in event    event which   event keyCode       isNotWanted    keyCode    69    keyCode    101       return  isNotWanted     function handlePaste  e        var clipboardData  pastedData          Get pasted data via clipboard API     clipboardData   e clipboardData    window clipboardData      pastedData   clipboardData getData  Text   toUpperCase         if pastedData indexOf  E   gt -1              alert  found an E            e stopPropagation            e preventDefault

User · Answer

To hide both letter e and minus sign - just go for   onkeydown  return event keyCode     69  amp  amp  event keyCode     189

User · Answer

The E stands for the exponent  and it is used to shorten long numbers  Since the input is a math input and exponents are in math to shorten great numbers  so that s why there is an E  It is displayed like this  4e  Links  1 and 2

User · Answer

We can make it So simple like below   x000D   x000D   lt input type  number   onkeydown  javascript  return event keyCode    69   false   true    gt  x000D   x000D   x000D    Updated Answer  we can make it even more simple as  88 MPG suggests   x000D   x000D   lt input type  number  onkeydown  return event keyCode     69    gt  x000D   x000D   x000D

User · Answer

The best way to force the use of a number composed of digits only    x000D   x000D   lt input type  number  onkeydown  javascript  return event keyCode     8    x000D  event keyCode     46   true    isNaN Number event key      gt  x000D   x000D   x000D    this avoids  e    -                all characters that are not numbers    To allow number keys only      isNaN Number event key     but accept  Backspace   keyCode  8  and  Delete   keyCode  46

User · Answer

HTML input number type allows  e E  because  e  stands for exponential which is a numeric symbol    Example 200000 can also be written as 2e5  I hope this helps thank you for the question

[html] Why does the html input with type "number" allow the letter 'e' to be entered in the field?

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