The importance of scope in ng-style

Question

The importance of scope in ng-style

I am attempting to dynamically change the font color in an input field based on the value entered into that field. However, I have encountered an issue with using ng-style as it is not recognizing the value of the scope and therefore the color does not update.

Here is the code snippet I utilized:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': {{saldo}} < 0.00 ? 'red' : 'green') }">

This error message is what I am receiving:

Error: [$parse:syntax] Syntax Error: Token '<' not a primary expression at column 12 of the expression [{'color':  < 0.00 ? 'red' : 'green') }] starting at [< 0.00 ? 'red' : 'green') }].

So my question is, how can I successfully access and utilize the 'saldo' value within the ng-style? (placing {{saldo}} outside the ng-style displays the correct value)

css angularjs

Answer 1

Answer №1

Here is my suggestion:

<input disabled name="balance" type="text" class="form-control" 
       placeholder="0.00" ng-model="balance" 
       ng-style="balance < 0.00 ? {'color':'red'} : {'color':'green'}">

I hope you find this helpful.

Best regards

Answer 2

Here is my suggestion:

<input disabled name="balance" type="text" class="form-control" 
       placeholder="0.00" ng-model="balance" 
       ng-style="balance < 0.00 ? {'color':'red'} : {'color':'green'}">

I hope you find this helpful.

Best regards

Answer 3

Answer №2

Using {{}} in ng-style is unnecessary.

Instead of:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': {{saldo}} < 0.00 ? 'red' : 'green') }">

Use this approach:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': saldo < 0.00 ? 'red' : 'green') }">

Answer 4

Using {{}} in ng-style is unnecessary.

Instead of:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': {{saldo}} < 0.00 ? 'red' : 'green') }">

Use this approach:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': saldo < 0.00 ? 'red' : 'green') }">

Answer 5

Answer №3

Here is a useful code snippet for you:

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

myApp.controller('GreetingController', ['$scope', function($scope) {
  $scope.saldo = 1;
}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp">
  <div ng-controller="GreetingController">
<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="saldo < 0.00 ? {color: 'red'} : {color: 'green'}">
  </div>
</div>

Answer 6

Here is a useful code snippet for you:

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

myApp.controller('GreetingController', ['$scope', function($scope) {
  $scope.saldo = 1;
}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp">
  <div ng-controller="GreetingController">
<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="saldo < 0.00 ? {color: 'red'} : {color: 'green'}">
  </div>
</div>

Answer 7

Answer №4

If you want to dynamically change the font color in an input field based on its value, here is a sample code snippet you can use:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': saldo}">

Answer 8

If you want to dynamically change the font color in an input field based on its value, here is a sample code snippet you can use:

<input disabled name="saldo" type="text" class="form-control" placeholder="0.00" ng-model="saldo" ng-style="{'color': saldo}">

The importance of scope in ng-style

Answer №1

Answer №2

Answer №3

Answer №4

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