What is the best way in Angular to focus on an input field using its name, model, or id?

Question

What is the best way in Angular to focus on an input field using its name, model, or id?

My goal is to create a form where, upon leaving field one (blur), the system will check if the data inputted is the word "test". If the data does not contain this word, I want the focus to return to field 1.

<form name='yourForm' novalidate ng-submit="save(yourForm)">

        <label>Field 1</label>
        <input type="email" name="first" ng-model="fname" ng-blur="displayData(fname)">
        <br><br>

        <label>Field 2</label>
        <input type="text" name="last" ng-model="lname" ng-blur="displayData(lname)">

        <button type="button">finish</button>
</form>

I am currently having difficulty figuring out how to set the field focus using the field's name, id, or ng-model in Angular.

The desired functionality I would like to achieve is something similar to the following JavaScript code:

var inp = document.getElementsByTagName('INPUT')[1];
inp.focus();

However, I am unsure of how to determine the index or retrieve the name of the input for implementation.

javascript angularjs

Answer 1

Answer №1

One solution is to implement a directive like the following:

REVISED

Included an additional parameter in the attribute value to specify the expected input before triggering blur event

https://jsfiddle.net/0bcsvLk5/

Angular Directive

function inputBlur() {
  var directive = {
    restrict: 'EA',
    scope: {
      inputBlur:'@'
    },
    link: link
  };

  return directive;

  function link(scope, element, attr) {
    element.on('blur', function() {
      if (element.val() != scope.inputBlur) {
        element[0].focus();
        e.preventDefault();
      }
    });
  }
}

Sample HTML Usage

<input type="text" ng-model="fname" input-blur="test" class="form-control">
<br>
<input type="text" ng-model="lname" class="form-control">
<br>
<input type="text" ng-model="email" class="form-control">

Answer 2

One solution is to implement a directive like the following:

REVISED

Included an additional parameter in the attribute value to specify the expected input before triggering blur event

https://jsfiddle.net/0bcsvLk5/

Angular Directive

function inputBlur() {
  var directive = {
    restrict: 'EA',
    scope: {
      inputBlur:'@'
    },
    link: link
  };

  return directive;

  function link(scope, element, attr) {
    element.on('blur', function() {
      if (element.val() != scope.inputBlur) {
        element[0].focus();
        e.preventDefault();
      }
    });
  }
}

Sample HTML Usage

<input type="text" ng-model="fname" input-blur="test" class="form-control">
<br>
<input type="text" ng-model="lname" class="form-control">
<br>
<input type="text" ng-model="email" class="form-control">

Answer 3

Answer №2

To ensure functionality, it is important to define the displayData() function within your $scope. To access the value of an element, you can utilize document.getElementByName('name')[0].value

For a demonstration, view this example: http://jsbin.com/xeyozocoyi/1/edit?html,js,output

var app = angular.module('Demo', []);
app.controller('TestCtrl', function ($scope) {

$scope.displayData = function(){

   var inp = document.getElementsByName('first')[0];

    if(inp.value != "test"){
       alert("Will focus because value is" + inp.value);
      inp.focus();
      return false;
    }
    return true;
  };

});

Additionally, ensure that your view contains the following elements:

<div ng-controller="TestCtrl" >   
    <form name='yourForm' novalidate ng-submit="save(yourForm)">

        <label>Field 1</label>
        <input type="email" name="first" ng-model="fname"   ng-blur="displayData()">
        <br><br>

        <label>Field 2</label>
        <input type="text"   name="last" ng-model="lname"  ng-blur="displayData()">

        <button type="button">finish</button>
</form>
</div>

Answer 4

To ensure functionality, it is important to define the displayData() function within your $scope. To access the value of an element, you can utilize document.getElementByName('name')[0].value

For a demonstration, view this example: http://jsbin.com/xeyozocoyi/1/edit?html,js,output

var app = angular.module('Demo', []);
app.controller('TestCtrl', function ($scope) {

$scope.displayData = function(){

   var inp = document.getElementsByName('first')[0];

    if(inp.value != "test"){
       alert("Will focus because value is" + inp.value);
      inp.focus();
      return false;
    }
    return true;
  };

});

Additionally, ensure that your view contains the following elements:

<div ng-controller="TestCtrl" >   
    <form name='yourForm' novalidate ng-submit="save(yourForm)">

        <label>Field 1</label>
        <input type="email" name="first" ng-model="fname"   ng-blur="displayData()">
        <br><br>

        <label>Field 2</label>
        <input type="text"   name="last" ng-model="lname"  ng-blur="displayData()">

        <button type="button">finish</button>
</form>
</div>

What is the best way in Angular to focus on an input field using its name, model, or id?

Answer №1

REVISED

Angular Directive

Sample HTML Usage

Answer №2

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