AngularJs Watermark for input text box

AngularJs Watermark for Textbox

Hello everyone, I am going to share the code sample for how to watermark for input text-box in Angularjs.

Here we can achieve angular watermark functionality using the creating custom directive which are give below.


The HTML code is

<input type="email" ng-model="useremail" email-watermark="Enter a Valid Email.."  />



The AngularJs code is

var app = angular.module('watermarkApp', []);

        app.controller('watermarkCtrl', function ($scope) {
            $scope.useremail = null;
        });

        app.directive('emailWatermark', function ($timeout) {
            return {
                restrict: 'A',
                require: 'ngModel',
                link: function (scope, element, attr, ctrl) {
                    $timeout(function () {
                        var onFocus = function () {
                            if (element.val() === attr.emailWatermark) {
                                element.val("");
                            }
                            element.removeClass('watermark');
                        };

                        var onBlur = function () {
                            if (element.val() === "") {
                                element.val(attr.emailWatermark);
                                element.addClass('watermark');
                            }
                        };

                        if (attr.readonly !== true) {
                            element.bind('focus', onFocus);
                            element.bind('blur', onBlur);
                            element.triggerHandler('blur');
                        }

                        //Watching to the value changed.
                        scope.$watch(attr.ngModel, function (v) {
                            onFocus();
                            onBlur();
                        });

                    });
                }
            };
        });

The Live demo code(HTML + AngularJs) as given below

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>angularjs watermark for textbox</title>
    <link rel="stylesheet" href="style.css" />
    <script src="https://code.angularjs.org/1.4.3/angular.js"></script>
    <script>
        var app = angular.module('watermarkApp', []);

        app.controller('watermarkCtrl', function ($scope) {
            $scope.useremail = null;
        });

        app.directive('emailWatermark', function ($timeout) {
            return {
                restrict: 'A',
                require: 'ngModel',
                link: function (scope, element, attr, ctrl) {
                    $timeout(function () {
                        var onFocus = function () {
                            if (element.val() === attr.emailWatermark) {
                                element.val("");
                            }
                            element.removeClass('watermark');
                        };

                        var onBlur = function () {
                            if (element.val() === "") {
                                element.val(attr.emailWatermark);
                                element.addClass('watermark');
                            }
                        };

                        if (attr.readonly !== true) {
                            element.bind('focus', onFocus);
                            element.bind('blur', onBlur);
                            element.triggerHandler('blur');
                        }

                        //Watching to the value changed.
                        scope.$watch(attr.ngModel, function (v) {
                            onFocus();
                            onBlur();
                        });

                    });
                }
            };
        });

    </script>
</head>
<body ng-app="watermarkApp" ng-controller="watermarkCtrl">
    <h1>AngularJs watermark for textbox</h1>
    <form id="frmEmail">
        Email : <input type="email" ng-model="useremail" email-watermark="Enter a Valid Email.." class="tb8" />
    </form>
</body>
</html>



ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
My Blogs - https://code-sample.com and https://code-sample.xyz
My Book1 - BEST SELLING ANGULAR BOOK (INCLUDING ALL VERSIONS 2, 4, 5, 6, 7)
My Book2 - ANGULAR 2 INTERVIEW QUESTIONS BOOK - Both Books are Available on WorldWide.

www.code-sample.com/. Powered by Blogger.