form validation using jquery

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Federica
23 May 2018
1<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.2/jquery.validate.min.js"></script>
source
Mats
23 Jan 2020
1reference : https://www.sitepoint.com/basic-jquery-form-validation-tutorial/
2
3// Wait for the DOM to be ready
4$(function() {
5  // Initialize form validation on the registration form.
6  // It has the name attribute "registration"
7  $("form[name='registration']").validate({
8    // Specify validation rules
9    rules: {
10      // The key name on the left side is the name attribute
11      // of an input field. Validation rules are defined
12      // on the right side
13      firstname: "required",
14      lastname: "required",
15      email: {
16        required: true,
17        // Specify that email should be validated
18        // by the built-in "email" rule
19        email: true
20      },
21      password: {
22        required: true,
23        minlength: 5
24      }
25    },
26    // Specify validation error messages
27    messages: {
28      firstname: "Please enter your firstname",
29      lastname: "Please enter your lastname",
30      password: {
31        required: "Please provide a password",
32        minlength: "Your password must be at least 5 characters long"
33      },
34      email: "Please enter a valid email address"
35    },
36    // Make sure the form is submitted to the destination defined
37    // in the "action" attribute of the form when valid
38    submitHandler: function(form) {
39      form.submit();
40    }
41  });
42});
source
Giovanni
28 Oct 2016
1<script src="https://cdn.jsdelivr.net/jquery.validation/1.16.0/jquery.validate.min.js"></script>
2then add javascript code:
3$(document).ready(function() {
4   $("#form").validate();
5});
6</script>
source
Paul
27 Apr 2020
1jQuery(document).ready(function() {
2   jQuery("#forms).validate({
3      rules: {
4         firstname: 'required',
5         lastname: 'required',
6         u_email: {
7            required: true,
8            email: true,//add an email rule that will ensure the value entered is valid email id.
9            maxlength: 255,
10         },
11      }
12   });
13});
source
Silvia
27 Feb 2016
1$('form[id="second_form"]').validate({
2  rules: {
3    fname: 'required',
4    lname: 'required',
5    user_email: {
6      required: true,
7      email: true,
8    },
9    psword: {
10      required: true,
11      minlength: 8,
12    }
13  },
14  messages: {
15    fname: 'This field is required',
16    lname: 'This field is required',
17    user_email: 'Enter a valid email',
18    psword: {
19      minlength: 'Password must be at least 8 characters long'
20    }
21  },
22  submitHandler: function(form) {
23    form.submit();
24  }
25});
26
Matteo
28 Apr 2020
1<html>
2<body>
3<h2>Validation of a form</h2>
4<form id="form" method="post" action="">
5First name:<br>
6<input type="text" name="firstname" value="john">
7<br>
8Last name:<br>
9<input type="text" name="lastname" value="Doe">
10<br>
11Email:<br>
12<input type="email" name="u_email" value="johndoe@gmail.com">
13<br>
14<br><br>
15<input type="submit" value="Submit">
16</form>
17</body>
18</html>
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