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jsFormValidation

  • Version 1.0.3
  • Update 17. July 2016
  • Author Tom Hell
  • License MIT

Realtime form validation with jsFormValidation.js (no jQuery!)

Thats the first version of jsFormValidation with a size of 4KB if minimized and will be improved. jsFormValidation field support:

  • text
  • date
  • number
  • tel
  • email
  • checkbox
  • radio
  • textarea
  • select
  • password
  • postcode

jsFormValidaton supports also multiple form definitions on one website.

By deactivated javascript the standard behavior off css will be replaced the functionality.

Code Examples

#####STANDARD FORM FIELD DEFINITION

<label for="field" class="required">
 <span>Field</span>
 <input type="password" id="field" minlength="8" maxlength="35" 
        onkeyup="selectFunction(this)" autocomplete="off" required>
 <ul class="rules">
  <li>min. 8 char</li>
  <li>upper- and lower chars</li>
  <li>min. one special sign</li>
 </ul>
</label>

#####SELECT FIELD DEFINITION

<label for="field" class="required">
 <span>Field</span>
 <div class="select-wrapper required">
  <select id="field" onchange="selectFunction(this)" required>
   <option selected></option>
   <option>Case 1</option>
   <option>...</option>
  </select>
 </div>
 <ul class="rules">
  <li>min. 1 selection</li>
 </ul>
</label>

#####FIELDSET CHECKBOX DEFINITION

<fieldset class="c-checkbox">
 <span>Field</span>
 <label for="checkbox" class="required">
  <input type="checkbox" id="checkbox" value="agb" name="agb" onclick="selectFunction(this)" required>
  Checkbox Label
 </label>
 <label for="checkbox2" class="required">
  <input type="checkbox" id="checkbox2" value="wr" name="wr" onclick="selectFunction(this)" required>
  Checkbox Label 2
 </label>
</fieldset>

#####FIELDSET RADIO DEFINITION

<fieldset class="c-radio required">
 <span>Field</span>
 <label for="radio3">
  <input type="radio" id="radio3" value="MS" name="radio" onclick="selectFunction(this)" required>
  Radio
 </label>
 <label for="radio4">
  <input type="radio" id="radio4" value="PP" name="radio" onclick="selectFunction(this)">
  Radio 2
 </label>
</fieldset>

Motivation

Most forms are validate on server side. Thats truly a bad scenario in the mobile world. Thats the reason why I wrote this script to make forms better in the future and improve the usability.

Installation

  1. set a id to your form html < form id="demo" >
  2. set the required attribute for every mandatory form element
  3. suround your input form elements by the label tag, exception are select fields or radio and checkbox groups
  4. Set class="required" attribute to the label tag, required will be replaced later by valid if the form field is true
  5. every form element get the selectFunction(this) methode depends on there action, methods: onclick, onchange, onkeyup
  6. open jsFormValidation.js file and go to the function definition selectFunction and registry your form element to the switch loop as a own case with the right method. ie.:
case "firstname"     : textFunc(ele,eValue,inputLength,minLength,maxLength,rules);break;
  1. depends on the form field you should set attributes like minlength, maxlength, pattern and so on and if you are not sure see the JS methode which attributes are needed

License

MIT