After choosing an option in AngularJS, the ng-options feature no longer shows a default blank value

I am working with ng-options in my select tag to provide users with choices. Everything is functioning smoothly, but I noticed that once an option is selected, the default blank value disappears. Is there a way to revert back to the default blank value if needed? How can I maintain that blank value?

Here is a snippet of my code:

<!DOCTYPE html>
<html ng-app="app">

  <head>
    <link rel="stylesheet" href="style.css">
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
  </head>

  <body ng-controller="myController">
    <h1>Hello World!</h1>
    <select ng-model="mySelection" name="" id="" ng-options="x.value as x.label for x in myOptions">

    </select>
  </body>

</html>

<script>
  var app = angular.module('app', []);
  app.controller('myController', function($scope){
    $scope.myOptions = [{
      "value": null,
      "label": null,
    },{
      "value": "First",
      "label": "First",
    },{
      "value": "Second",
      "label": "Second",
    },{
      "value": "Third",
      "label": "Third",
    }]
  });
</script>

You can view the working example on Plunker: http://plnkr.co/edit/5f17YxRfWFI4g40t3NEf?p=preview

Answer №1

implement

<select ng-model="mySelection" name="" id="" ng-options="x.value as x.label for x in myOptions">
    <option value=""></option>
  </select>

Avoid cluttering your 'myOptions' with unnecessary null objects, since APIs may not provide them. It is best to handle this on the presentation layer, as demonstrated above. When saving, if a user selects nothing, it will be saved as null (assuming proper handling)

You can also consider adding something like this

<option value="">---choose---</option>

Answer №2

To implement a blank option, simply add it to your list of options and set it as the default selection:

<!DOCTYPE html>
<html ng-app="app">

  <head>
    <link rel="stylesheet" href="style.css">
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
  </head>

  <body ng-controller="myController">
    <h1>Hello World!</h1>
    <select ng-model="mySelection" name="" id="" ng-options="x.value as x.label for x in myOptions">

    </select>
  </body>

</html>

<script>
  var app = angular.module('app', []);
  app.controller('myController', function($scope){
    $scope.mySelection = '';
    $scope.myOptions = [{
      "value": "",
      "label": "",
    },{
      "value": "First",
      "label": "First",
    },{
      "value": "Second",
      "label": "Second",
    },{
      "value": "Third",
      "label": "Third",
    }]
  });
</script>

In this example, we have included the blank option:

{
  "value": "",
  "label": "",
}

We then set the empty option as the selected value using $scope.mySelection = '';

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What causes the error "Why am I receiving a "Cannot read property 'length' of undefined" when looping through a pug template?

Currently, I am in the process of developing a project using Node and Express. My objective is to have the home page display signup and login links in the nav bar when the user is not logged in. Initially, everything seemed to be working fine, and I was ab ...

Accessing a file's source using the Box.net API and downloading the file contents

Recently, I've been busy working on a Web Application project (for fun) that focuses on editing files stored in the cloud. I'm utilizing the box.net API for this task, but I've come across a challenge - obtaining the source code of files. Un ...

The most effective method for transitioning an application from AngularJS to React-Typescript Micro Frontend

We are in the process of migrating from a monolithic AngularJS App to a ReactJS Micro Frontend App. Our current AngularJS App consists of 64 HTML pages, each rendered based on the API response containing LayoutId. Below is a snippet of the code structure: ...

Tips and tricks for storing and retrieving form state using local storage with jQuery in JavaScript

I'm trying to save the form state in localstorage, I am able to save it successfully but I'm encountering an issue where I am unable to save the input typed data Desired outcome: If I type doggy inside the input box, I want that value to be ret ...

Changing the port number for a gulp-angular project with loopback REST API: A step-by-step guide

I'm currently working on a project that utilizes loopback for the backend and Angular for the frontend. My client side was set up with gulp-angular, and I added lb-services.js from loopback. The issue I am facing is that my Angular application is atte ...

The $watch feature in AngularJS does not function properly within a directive when a controller is used to update data

I created a custom directive and also have a controller to bind data to the directive. The data is retrieved from the server and bound to the directive. However, I noticed that the data in the directive on the page does not update when I change the scope ...

Learn how to update a form dynamically using the Ajax.BeginForm feature

I am currently working on updating a form within my application using Ajax.BeginForm. The update process is functioning correctly, however, upon executing the function in the controller, it redirects to a view with the controller function name displayed. ...

Hide the div when it loses focus

CSS <input type="textarea" id="form1"> <div id="messageBox">This is a message box with hidden secrets</div> <button>Do Not Click</button> and JavaScript $(function(){ $("#form1").blur(function() { $("#message ...

Combine various hierarchies using a single JSON with d3.pack

I currently have a JSON file that I need to utilize in order to create three distinct hierarchy visualizations using d3.pack. This JSON file contains data for eventA (1 or 0) and eventB (1 or 0). Each individual leaf also possesses a unique ID. The hiera ...

Creating Responsive Image Map Areas in HTML

Implementing image maps on my website has been a challenge because of the lack of responsiveness. I am struggling to adjust the size of map areas when resizing the window. If anyone can help with this issue, I am open to using either JavaScript or CSS met ...

Having an issue with jQuery not() function and dropdown menus

I am facing an issue with a horizontal list menu that toggles the visibility of a nested list when clicked. The functionality works almost perfectly, as clicking on the menu toggles its visibility. However, when I click inside the newly revealed element, t ...

Exploring the combination of Meteor's Flow router or Iron router with the powerful Angular UI

I am currently working on integrating server-side rendering with distinct root HTML files into my Angular-Meteor project. However, since Angular does not inherently support server-side rendering and the iron router/flow router that enables this feature w ...

Error message: ParseError: Received an unexpected character '<' while running tests using AVA

Initially encountering an issue within the project built on nuxt, I attempted to resolve it by creating a new project using vue-cli and re-installing AVA via npm. However, this did not have any effect on the problem at hand. Upon researching, I came across ...

Issues with Jquery/AJAX function not responding to onChange Event

I am currently working on a project where I need to populate a dropdown menu based on the value selected from another dropdown. However, I am encountering an issue with the function that I am trying to call in the onChange event of the select tag. This is ...

Leveraging Array.map within Angular Interpolation

Is it possible to achieve the following in HTML using Angular 2+? {{ object.array.map((o) => o.property ) }} Whenever I try to execute this code, it crashes the Angular application. Do I need to utilize Pipes or any other technique? ...

Slideshow featuring a dynamic ken burns effect with color overlays

I am having an issue with my ken burns effect slideshow on the mobile site. I am trying to add an overlay that automatically switches between green, red, yellow, and blue colors but it's not showing up. I can't seem to figure out what the problem ...

Unable to retrieve image from database through restful API

Trying to retrieve a photo for a specific userId stored in the database. The API response generated is as follows: https://i.sstatic.net/1xE6S.png However, it is being received in the error section of the getPhotopath() method in the controller: https://i. ...

Choosing Select2 in a search form

Having trouble setting up a search form using Select2? The user should be able to enter a search term, get suggestions via AJAX, and either click on the suggestion to be directed to a page or submit the form for an extended search. However, clicking on the ...

Error encountered with underscore template - Unforeseen SyntaxError: Unexpected token <

I encountered an error when attempting to load one of my underscore templates. It seems to be related to an issue in the for loop, which I suspect should be a .each loop, but I'm still trying to grasp its structure. Here is a snippet of my template: ...

I'm a beginner with Angularjs and I attempted to populate multiple JSON values, but unfortunately, it didn't work as expected

<div ng-controller="studentController" ng-repeat = "student in students | unique = 'RollNo' " > <table class="profile-info"> <tr> <th>Enrollment Number</th> <td> ...