angularjs force uppercase in textbox

Question

I\'ve tried using the uppercase filter but it does not work. I\'ve tried doing it two ways:

<         


        

Answer 1

The accepted answer causes problems if someone tries to enter a lowercase letter at the beginning of an existing string.. The cursor moves to the end of the string after each key press. Here's a simple solution that addresses all the issues:

directive('uppercased', function() {
    return {
        require: 'ngModel',
        link: function(scope, element, attrs, modelCtrl) {
            modelCtrl.$parsers.push(function(input) {
                return input ? input.toUpperCase() : "";
            });
            element.css("text-transform","uppercase");
        }
    };
})

Here's a fiddle: http://jsfiddle.net/36qp9ekL/1710/

Answer 2

Please see the other answer below, which is superior to this one.

this answer is based on the answer here: How to autocapitalize the first character in an input field in AngularJS?.

I'd imagine that what you'd want would be a parser function like this:

angular
  .module('myApp', [])
  .directive('capitalize', function() {
    return {
      require: 'ngModel',
      link: function(scope, element, attrs, modelCtrl) {
        var capitalize = function(inputValue) {
          if (inputValue == undefined) inputValue = '';
          var capitalized = inputValue.toUpperCase();
          if (capitalized !== inputValue) {
            // see where the cursor is before the update so that we can set it back
            var selection = element[0].selectionStart;
            modelCtrl.$setViewValue(capitalized);
            modelCtrl.$render();
            // set back the cursor after rendering
            element[0].selectionStart = selection;
            element[0].selectionEnd = selection;
          }
          return capitalized;
        }
        modelCtrl.$parsers.push(capitalize);
        capitalize(scope[attrs.ngModel]); // capitalize initial value
      }
    };
  });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="myApp">
  <input type="text" ng-model="name" capitalize>
</div>

Answer 3

I would just use the filter itself in the controller:

 $filter('uppercase')(this.yourProperty)

just keep in mind that, if you you are going to use it inside a controller, for example, you need to inject this filter:

app.controller('FooController', ['$filter', function($filter) ...

Answer 4

When used with Bootstrap, just add text-uppercase to input's class attribute.

Answer 5

Solution with cursor shift fix

.directive('titleCase', function () {
        return {
            restrict: 'A',
            require: 'ngModel',
            link: function (scope, element, attrs, modelCtrl) {
                var titleCase = function (input) {
                    let first = element[0].selectionStart;
                    let last = element[0].selectionEnd;
                    input = input || '';
                    let retInput = input.replace(/\w\S*/g, function (txt) { return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase(); });
                    if (input !== retInput) {
                        modelCtrl.$setViewValue(retInput);
                        attrs.ngModel = retInput;
                        modelCtrl.$render();
                        if (!scope.$$phase) {
                            scope.$apply(); // launch digest;
                        }
                    }
                    element[0].selectionStart = first;
                    element[0].selectionEnd = last;
                    return retInput;
                };
                modelCtrl.$parsers.push(titleCase);
                titleCase(scope[attrs.ngModel]);  // Title case  initial value
            }
        };
    });

Answer 6

You cannot make filter on ng-model since it has to be assignable. the workaround is either parser, or simply ng-change.

<input ng-model="some" ng-change="some = (some | uppercase)"  />

This should work.