Ways to restrict input text to a specific set of values

Question

Ways to restrict input text to a specific set of values

When using an input text form, I need to ensure that users only insert values ranging from 1 to 10.

However, my attempts to utilize a mask for customization have resulted in allowing values higher than 10. How can I restrict the input to only be allowed between 1 and 10?

The form:

The mask I employed to accept only numbers and limit it to 2 digits:

function maskFormatterForLvl(val) {
$(val).mask("ZZ", {
    translation: {
        'Z': {
            pattern: /[0-9]/,
            optional: true
        }
    }
});

I attempted to use the "max" attribute without success, likely due to my limited experience with JavaScript.

javascript jquery json html css

Answer 1

Answer №1

If you want to ensure that the values entered into your input fields are numbers, you can use the 'number' input type. The min and max attributes allow you to specify a range for the numbers that can be inputted. This makes it simpler and more user-friendly.

<input type="number" min="0" max="10">

UPDATE

To hide the arrows on the number input field, you can add the following CSS:

/* For Webkit browsers like Safari and Chrome */
    input[type=number]::-webkit-inner-spin-button, 
    input[type=number]::-webkit-outer-spin-button { 
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
        margin: 0; 
    }
/* For Firefox */
    input[type='number'] {
       -moz-appearance:textfield;
    }

Answer 2

If you want to ensure that the values entered into your input fields are numbers, you can use the 'number' input type. The min and max attributes allow you to specify a range for the numbers that can be inputted. This makes it simpler and more user-friendly.

<input type="number" min="0" max="10">

UPDATE

To hide the arrows on the number input field, you can add the following CSS:

/* For Webkit browsers like Safari and Chrome */
    input[type=number]::-webkit-inner-spin-button, 
    input[type=number]::-webkit-outer-spin-button { 
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
        margin: 0; 
    }
/* For Firefox */
    input[type='number'] {
       -moz-appearance:textfield;
    }

Answer 3

Answer №2

If you are required to use type="text", you may employ this regular expression.

<input type="text" pattern="([0-9])|(10)">

Answer 4

If you are required to use type="text", you may employ this regular expression.

<input type="text" pattern="([0-9])|(10)">

Answer 5

Answer №3

To ensure that only numbers are typed into a text input field, you can utilize the charCode property in JavaScript. The keyboard numbers from 0 to 9 correspond to charCodes 48 to 57.

After validating if the input consists of only numbers, you can then check if it exceeds the maximum value allowed for the input.

Regarding the minimum value, preventing users from entering negative values (below 0) is achieved by disallowing the use of the '-' symbol which doesn't adhere to the initial condition of accepting only numbers.

const input = document.getElementById('level')
input.onkeypress = function(e) {
    var ev = e || window.event;
    if (ev.charCode < 48 || ev.charCode > 57) {
      return false;
    } else if (this.value * 10 + ev.charCode - 48 > this.max) {

      return false;
      } else if (this.value * 10 + ev.charCode - 48 < this.min) {

      return false;
    } else {
      return true;
    }
  }

<input type="text" name="level" id="level" min="1" max="10" maxlength="2">

Answer 6

To ensure that only numbers are typed into a text input field, you can utilize the charCode property in JavaScript. The keyboard numbers from 0 to 9 correspond to charCodes 48 to 57.

After validating if the input consists of only numbers, you can then check if it exceeds the maximum value allowed for the input.

Regarding the minimum value, preventing users from entering negative values (below 0) is achieved by disallowing the use of the '-' symbol which doesn't adhere to the initial condition of accepting only numbers.

const input = document.getElementById('level')
input.onkeypress = function(e) {
    var ev = e || window.event;
    if (ev.charCode < 48 || ev.charCode > 57) {
      return false;
    } else if (this.value * 10 + ev.charCode - 48 > this.max) {

      return false;
      } else if (this.value * 10 + ev.charCode - 48 < this.min) {

      return false;
    } else {
      return true;
    }
  }

<input type="text" name="level" id="level" min="1" max="10" maxlength="2">

Ways to restrict input text to a specific set of values

Answer №1

Answer №2

Answer №3

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