Is there any way to prevent input type="number" getting negative values?

input type=text prevent negative
html input type=number only positive
input type=number default value
input type=number'' maxlength validation
input type=number no decimal
angular 2 prevent negative numbers
input type=number css
input type=number custom arrows css

I want to get only positive values, is there any way to prevent it using only html Please don't suggest validation method

Use the min attribute like this:

<input type="number" min="0">

How to limit the number of characters allowed in form input text field?, symbol. Example 200000 can also be written as 2e5. The extra check on selectionStart makes sure that you can still remove all digits: an empty input is considered an invalid number, but it would be strange to not be able to delete the last character from the input. Remarks. Although this is what you asked for in your question, please note that blocking user input is not particularly user-friendly.

I was not satisfied with @Abhrabm answer because:

It was only preventing negative numbers from being entered from up/down arrows, whereas user can type negative number from keyboard.

Solution is to prevent with key code:

// Select your input element.
var number = document.getElementById('number');

// Listen for input event on numInput.
number.onkeydown = function(e) {
    if(!((e.keyCode > 95 && e.keyCode < 106)
      || (e.keyCode > 47 && e.keyCode < 58) 
      || e.keyCode == 8)) {
        return false;
    }
}
<form action="" method="post">
  <input type="number" id="number" min="0" />
  <input type="submit" value="Click me!"/>
</form>

How to Disable All Input Controls Inside a Form Using jQuery, Client side JavaScript can not ensure that the data that is being sent will be what you expect it to be. If you want to ensure default value, i.e min value, or any other value, this is working solution. This is also preventing to clear the input field. Same way you can set to it's max value as well. input elements of type "hidden" let web developers include data that cannot be seen or modified by users when a form is submitted. For example, the ID of the content that is currently being ordered or edited, or a unique security token. Hidden inputs are completely invisible in the rendered page, and there is no way to make it visible in the page's content.

For me the solution was:

<input type="number" min="0" oninput="this.value = Math.abs(this.value)">

Why does the html input with type "number" allow the letter 'e' to be , No matter how the form is generated it's good practice to validate the input before the form is submitted. This will help prevent data errors and the user will be  Moreover, input [number] is 1) not restricting me from typing 10ddd and 2) (less important) contains arrows that i do not need. And the problem here is to prevent user from typing something beyond the restricted values, instead of allow to input anything and validate it afterwards. angular.

This code is working fine for me. Can you please check:

<input type="number" name="test" min="0" oninput="validity.valid||(value='');">

Some examples of defensive coding are input type checking: which consists of remain one of the simplest ways with which to prevent SQL injection attacks. Unfortunately, wherever a company employs people, there’s the potential for human error, and data entry errors are some of the costliest errors to companies. Fortunately, there are many ways to avoid data input errors and promote accuracy among employees.

Easy method:

<input min='0' type="number" onkeypress="return (event.charCode == 8 || event.charCode == 0) ? null : event.charCode >= 48 && event.charCode <= 57">

Set the default calling mode Input type: Dropdownlist Keyname: Valuename: “​CallingMethod” Prevent users from changing the calling mode Input type: Checkbox Disable NetMeeting 2.x Whiteboard Input type: Checkbox Valuename: “No  The <input type="url"> is used for input fields that should contain a URL address. Depending on browser support, the url field can be automatically validated when submitted. Some smartphones recognize the url type, and adds ".com" to the keyboard to match url input.

input elements of type number are used to let the user enter a number. Any values in the list that are not compatible with the type are not included in the suggested options. Note: Avoid using the placeholder attribute if you can. It is not as semantically useful as other ways to explain your form, and can  Definition and Usage. The type attribute specifies the type of <input> element to display. If the type attribute is not specified, the default type is "text".

How an <input> works varies considerably depending on the value of by the min attribute, constraint validation will prevent form submission. Obviously, you’d make use of the extensive formulas and formatting tools in Excel. At the end of the day, there’s just one thing you need to worry about; other people modifying your sheet. The good news is, you can lock Excel formulas to prevent editing while still allowing users to edit the sheet.

Example. An HTML form with a disabled input field: <form action="/action_page.​php"> <label for="fname">First name:</label> <input type="text" id="fname"  The <input> tag specifies an input field where the user can enter data. <input> elements are used within a <form> element to declare input controls that allow users to input data. An input field can vary in many ways, depending on the type attribute. Note: The <input> element is empty, it contains attributes only.

Comments
  • This thread answers the same question in much better extent: stackoverflow.com/questions/31575496/…
  • Here's a more reliable reference source.
  • This will block a negative number from being entered using the arrow buttons / spinner. However, the user can still manually enter in a negative number and have that field's value read as a negative number, thus bypassing the min attribute.
  • @demaniak No. And how did this answer get so many upvotes when it half answers the question is a mystery
  • @Abraham What if the data loaded with the -ve value in the form, it does not mark it as red.
  • This doesn't work, the user can still enter a negative number manually.
  • Upvoted but I think it would help to clarify what key codes are being checked: > 95, < 106 corresponds to Numpad 0 through 9; > 47, < 58 corresponds to 0 through 9 on the Number Row; and 8 is Backspace. So this script is preventing any key but those from being entered. It's thorough but I think it might be overkill for browsers that natively support number inputs, which already filter out alphabetical keys (except for characters like "e" which can have a numerical meaning). It would probably suffice to prevent against 189 (dash) and 109 (subtract). And then combine with min="0".
  • @Manwal It restricts to copy and paste numbers using keyboard. And allows me to copy paste negative numbers using mouse.
  • @Beniton Thanks giving this use case. Can you give me little idea about what you are doing.Always I can help you out. Please provide little runnable code or fiddle. You can have form Submit level validation for in your code. Although i always have check in Backend if i don't allow negative numbers.
  • Just copy-paste into the field basically. It's not really a special case or anything. Instead of handling the validation via keycode, it's probably better to do it onChange or focusOut and build a little validation function to catch any negative numbers.
  • I support @HughGuiney's advice, especially since this answer prevents arrow keys from being used to move around input field.
  • Really best solution once you use pattern and noformvalidate with angular , since the model is not updated if not within the range. My case : <input ng-model="row.myValue" type="{{row.code == 1 ? 'text' : 'number'}}" min="0" ng-pattern="..." noformvalidate oninput="if (this.type=='text') this.value=Math.abs(this.value) ">
  • this works best when user knows the default value is 0. Other wise user get confused on backspace press why field is not clearing. Except this, it is best solution.+1
  • you saved my day