knockout, css binding dynamic and conditional

knockout, css binding dynamic and conditional - javascript

I wan't to have a conditional css class and a dynamic css class added via the css binding.
Like so:
data-bind="css: {$data.something() : true, open : showOpen() }"

Clearest is probably to combine them in one computed:
function ViewModel() {
var self = this;
self.something = ko.observable("danger");
self.showOpen = ko.observable(true);
self.cssClass = ko.computed(function() {
return self.something() + (self.showOpen() ? " open" : "");
});
}
ko.applyBindings(new ViewModel());
div { padding: 10px; }
.danger { background-color: orange; }
.open { border: 5px solid gray; border-width: 5px 5px 0; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/2.2.1/knockout-min.js"></script>
<div data-bind="css: cssClass"> my div with class: <code data-bind="text: cssClass"></code> </div>
<hr>
<label><input type="checkbox" data-bind="checked: showOpen"> showOpen</label>
<br>
<input type="text" data-bind="value: something, valueUpdate: 'afterkeydown'">
Allows you to unit test the entire thing, and keeps your view concise.

I prefer a custom binding like this:
ko.bindingHandlers.klass = {
init: function (el, val) {
var prevClass = null
ko.computed(function () {
if (prevClass)
$(el).removeClass(prevClass);
var newClass = ko.unwrap(val());
$(el).addClass(newClass);
prevClass = newClass;
}, null, {disposeWhenNodeIsRemoved: el})
}
}
var vmo = {
cssClass: ko.observable('a'),
toggle: function () { vmo.cssClass(vmo.cssClass() == 'a' ? 'b' : 'a') }
}
ko.applyBindings(vmo);
.a {
color: red;
}
.b {
color: blue;
}
.another {
text-decoration: underline;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<p data-bind='klass: cssClass, css: {another: true}'>Hello</p>
<button data-bind='click: toggle'>Toggle</button>

Related

Why is my text output from next() and prev() toggle incorrect?

When clicking the arrows to change the displayed option, the incorrect options is shown.
The user should be able click on the option menu to toggle it open/cosed and be able to click on a option to select it. Alternatively, the arrows could be used to toggle through the options instead.
This is the problematic code:
<script>
$("#arrow_left_physics").click(function() {
var $selected = $(".left_menu_option_selected").removeClass("left_menu_option_selected");
var divs = $("#left_menu__variant_physics").children();
divs.eq((divs.index($selected) - 1) % divs.length).addClass("left_menu_option_selected");
$("#left_menu_open .button-text").text($($selected).text());
});
$("#arrow_right_physics").click(function() {
var $selected = $(".left_menu_option_selected").removeClass("left_menu_option_selected");
var divs = $selected.parent().children();
divs.eq((divs.index($selected) + 1) % divs.length).addClass("left_menu_option_selected");
$("#left_menu_open .button-text").text($($selected).text());
});
</script>
$("#menu_open").click(function() {
$("#menu").toggle();
});
$(".menu_option").click(function() {
if ($(this).hasClass(".menu_option_selected")) {} else {
$(".menu_option").removeClass("menu_option_selected");
$(this).addClass("menu_option_selected");
$("#menu_open .button_text").text($(this).text());
}
});
$("#arrow_left").click(function() {
var $selected = $(".menu_option_selected").removeClass("menu_option_selected");
var options = $("#menu").children();
options.eq((options.index($selected) - 1) % options.length).addClass("menu_option_selected");
$("#menu_open .button_text").text($($selected).text());
});
$("#arrow_right").click(function() {
var $selected = $(".menu_option_selected").removeClass("menu_option_selected");
var options = $("#menu").children();
options.eq((options.index($selected) + 1) % options.length).addClass("menu_option_selected");
$("#menu_open .button_text").text($($selected).text());
});
.menu_open {
Cursor: pointer;
}
.menu {
display: none;
position: absolute;
border: 1px solid;
}
.menu_option {
Cursor: pointer;
Padding: 5px;
}
.menu_option:hover {
Background-Color: black;
Color: white;
}
.menu_option_selected {
color: green;
Background-color: #00ff0a4d;
}
.menu_option_selected:hover {
color: green;
}
.arrow {
Cursor: pointer;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div>
<input class="arrow" type="button" id="arrow_left" value="❮" />
<input class="arrow" type="button" id="arrow_right" value="❯" />
</div>
<div>
<button class="menu_open" id="menu_open">
<span class="button_text">option1</span>
</button>
</div>
<div class="menu" id=menu>
<div class="menu_option menu_option_selected">option1</div>
<div class="menu_option">option2</div>
<div class="menu_option">option3</div>
<div class="menu_option">option4</div>
<div class="menu_option">option5</div>
<div class="menu_option">option6</div>
</div>
-It seems that the first click of the arrows isn't working and that the index function is incorrect somewhere.

The problem is this line:
$("#menu_open .button_text").text($($selected).text());
$($selected) is the option that was previously selected, so you're showing the text of the previous option, not the current option. (BTW, there's no need to wrap $selected in $(), since it's already a jQuery object.)
You should use $(".menu_option_selected").text() instead of $($selected).text() to get the current option.
You should also make the initial text of the button option1, so it matches the selected option.
$("#menu_open").click(function() {
$("#menu").toggle();
});
$(".menu_option").click(function() {
if ($(this).hasClass(".menu_option_selected")) {} else {
$(".menu_option").removeClass("menu_option_selected");
$(this).addClass("menu_option_selected");
$("#menu_open .button_text").text($(this).text());
}
});
$("#arrow_left").click(function() {
var $selected = $(".menu_option_selected").removeClass("menu_option_selected");
var options = $("#menu").children();
options.eq((options.index($selected) - 1) % options.length).addClass("menu_option_selected");
$("#menu_open .button_text").text($(".menu_option_selected").text());
});
$("#arrow_right").click(function() {
var $selected = $(".menu_option_selected").removeClass("menu_option_selected");
var options = $("#menu").children();
options.eq((options.index($selected) + 1) % options.length).addClass("menu_option_selected");
$("#menu_open .button_text").text($(".menu_option_selected").text());
});
.menu_open {
Cursor: pointer;
}
.menu {
display: none;
position: absolute;
border: 1px solid;
}
.menu_option {
Cursor: pointer;
Padding: 5px;
}
.menu_option:hover {
Background-Color: black;
Color: white;
}
.menu_option_selected {
color: green;
Background-color: #00ff0a4d;
}
.menu_option_selected:hover {
color: green;
}
.arrow {
Cursor: pointer;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div>
<input class="arrow" type="button" id="arrow_left" value="❮" />
<input class="arrow" type="button" id="arrow_right" value="❯" />
</div>
<div>
<button class="menu_open" id="menu_open">
<span class="button_text">option1</span>
</button>
</div>
<div class="menu" id=menu>
<div class="menu_option menu_option_selected">option1</div>
<div class="menu_option">option2</div>
<div class="menu_option">option3</div>
<div class="menu_option">option4</div>
<div class="menu_option">option5</div>
<div class="menu_option">option6</div>
</div>

Just another version, refactoring your javascript code with some Arrow functions.
const setButtonText = () => {
$("#menu_open .button_text").text(
$(".menu_option_selected").text()
);
}
const moveSelection = direction => {
var selected = $(".menu_option_selected")
var options = $("#menu").children()
var newIndex;
if (direction == 'right') {
newIndex = (options.index(selected) + 1) % options.length
} else {
newIndex = (options.index(selected) - 1) % options.length
}
selected.removeClass("menu_option_selected")
options.eq(newIndex).addClass("menu_option_selected")
setButtonText()
}
// inizilize menu button_text
setButtonText()
$("#arrow_left").click(() => moveSelection('left'));
$("#arrow_right").click( () => moveSelection('right'));
$("#menu_open").click( () => $("#menu").toggle());
$(".menu_option").click( function() {
$(".menu_option_selected").removeClass("menu_option_selected")
$(this).addClass("menu_option_selected")
setButtonText()
});

Vue 2 event listener on component root

I'm trying to capture an event on the component root node, but the following does not work. I don't want to just listen on a node in the component. I want to be able to click on any element and then hit backspace to remove it. The code below is a basic example of how I setup my code.
<template>
<div v-on:keydown.delete="delete()">
<img id="image" src="..." v-on:click="set_active()">
</div>
</template>
<script>
export default {
return {
data() {
active: ''
},
methods: {
delete(){
delete this.$refs[this.active][0];
},
set_active() {
this.active = event.target.getAttribute('id');
}
}
}
}
</script>

After doing some tests, here is what I discovered:
Having a method called delete won't work. I don't know why, the question remains unanswered here. Rename it to remove, for example.
When trying to catch keyboard events on a div, you may need to add a tabindex attribute for it to work. (See here)
Interactive demo
Vue.component('my-component', {
template: '#my-component',
data() {
return {
images: [
"https://media.giphy.com/media/3ohs7KtxtOEsDwO3GU/giphy.gif",
"https://media.giphy.com/media/3ohhwoWSCtJzznXbuo/giphy.gif",
"https://media.giphy.com/media/8L0xFP1XEEgwfzByQk/giphy.gif"
],
active: null
};
},
methods: {
set_active(i) {
this.active = i;
},
remove() {
if (this.active !== null) {
this.images = this.images.filter((_, i) => i !== this.active);
this.active = null;
}
}
}
});
var vm = new Vue({
el: '#app'
});
div {
outline: none; /* Avoid the outline caused by tabindex */
border: 1px solid #eee;
}
img {
height: 80px;
border: 4px solid #eee;
margin: .5em;
}
img:hover {
border: 4px solid #ffcda9;
}
img.active {
border: 4px solid #ff7c1f;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.21/vue.min.js"></script>
<div id="app">
<my-component></my-component>
</div>
<template id="my-component">
<div #keydown.delete="remove" tabindex="0">
<img
v-for="(img, i) in images"
:key="i"
:src="img"
:class="{ active: active === i }"
#click="set_active(i)"
/>
</div>
</template>

KnockoutJS: Make nested sortable automatically expand when adding a child

In the attached example I have a nested sortable that is capable of displaying tree structures.
The goal is to make the structure expand when new child is added to make the change visible.
A function automatically expands the structure when a new item is being added, but it only expands after adding 2nd child, it should expand immediately after adding 1st child.
Something is probably wrong with the template, or a simple jQuery+CSS trick could solve the problem, but I can't find the right one.
function Node(data) {
var self = this;
typeof data != 'undefined' ? self.id = data.id : self.id = '1';
self.parent = ko.observable();
self.children = ko.observableArray();
self.addNode = function() {
var child = new Node({
'id': self.id + '.' + (self.children().length + 1)
});
child.parent(self);
self.children.push(child);
return child;
}
};
var tree = new Node();
var child1 = tree.addNode();
var child2 = tree.addNode();
var viewModel = function() {
this.tree = ko.observable(tree);
this.addChild = function(node, event) {
var self = this;
node.addNode()
var $parent = $(event.target).parent().parent();
if ($parent.prop('tagName') == 'LI') {
if (!$parent
.hasClass('mjs-nestedSortable-expanded')) {
$parent
.addClass('mjs-nestedSortable-expanded');
}
if ($parent
.hasClass('mjs-nestedSortable-collapsed')) {
$parent
.removeClass('mjs-nestedSortable-collapsed');
}
}
}
};
ko.applyBindings(new viewModel());
$('.sortable')
.nestedSortable({
startCollapsed: true
});
ol.sortable,
ol.sortable ol {
margin: 0 0 0 25px;
padding: 0;
list-style-type: none;
}
ol.sortable {
margin: 4em 0;
}
.sortable li {
margin: 5px 0 0 0;
padding: 0;
}
.sortable li div {
border: 1px solid #d4d4d4;
cursor: move;
}
.sortable .disclose {
cursor: pointer;
width: 10px;
display: none;
}
.sortable li.mjs-nestedSortable-collapsed>ol {
display: none;
}
.sortable li.mjs-nestedSortable-branch>div>.disclose {
display: inline-block;
}
.sortable li.mjs-nestedSortable-collapsed>div>.disclose>span:before {
content: '+ ';
}
.sortable li.mjs-nestedSortable-expanded>div>.disclose>span:before {
content: '- ';
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.js"></script>
<script src="https://cdn.rawgit.com/furf/jquery-ui-touch-punch/master/jquery.ui.touch-punch.min.js"></script>
<script src="https://cdn.rawgit.com/mjsarfatti/nestedSortable/master/jquery.mjs.nestedSortable.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<div class="dd" data-bind="template: {name:'nodeTemplate', data: tree}"></div>
<script id='nodeTemplate' type='text/html'>
<div>
<span class="disclose"><span></span></span>
<span data-bind="text: id"></span>
Add child
</div>
<ol class="sortable ui-sortable" data-bind="foreach: { data: children, as: 'child' }">
<!-- ko if: child.children().length > 0 -->
<li class="mjs-nestedSortable-collapsed mjs-nestedSortable-branch" data-bind="template: {name:'nodeTemplate', data: child}, attr: { 'data-id': child.id }">
</li>
<!-- /ko -->
<!-- ko if: child.children().length == 0 -->
<li class="mjs-nestedSortable-leaf" data-bind="template: {name:'nodeTemplate', data: child}, attr: { 'data-id': child.id}">
</li>
<!-- /ko -->
</ol>
</script>

I don't know why but in the first call of AddChild you lose reference to the the parent element. You can replace knockout code:
var $parent = $(event.target).parent().parent();
to jQuery workaround:
var $parent = $('.dd').find('*').filter(function() {
return $(this).text() === node.id;
}).parent().parent();
modified snippet:
function Node(data) {
var self = this;
typeof data != 'undefined' ? self.id = data.id : self.id = '1';
self.parent = ko.observable();
self.children = ko.observableArray();
self.addNode = function() {
var child = new Node({
'id': self.id + '.' + (self.children().length + 1)
});
child.parent(self);
self.children.push(child);
return child;
}
};
var tree = new Node();
var child1 = tree.addNode();
var child2 = tree.addNode();
var viewModel = function() {
this.tree = ko.observable(tree);
this.addChild = function(node, event) {
var self = this;
node.addNode()
var $parent = $('.dd').find('*').filter(function() {
return $(this).text() === node.id;
}).parent().parent();
if ($parent.prop('tagName') == 'LI') {
if (!$parent
.hasClass('mjs-nestedSortable-expanded')) {
$parent
.addClass('mjs-nestedSortable-expanded');
}
if ($parent
.hasClass('mjs-nestedSortable-collapsed')) {
$parent
.removeClass('mjs-nestedSortable-collapsed');
}
}
}
};
ko.applyBindings(new viewModel());
$('.sortable')
.nestedSortable({
startCollapsed: true
});
ol.sortable,
ol.sortable ol {
margin: 0 0 0 25px;
padding: 0;
list-style-type: none;
}
ol.sortable {
margin: 4em 0;
}
.sortable li {
margin: 5px 0 0 0;
padding: 0;
}
.sortable li div {
border: 1px solid #d4d4d4;
cursor: move;
}
.sortable .disclose {
cursor: pointer;
width: 10px;
display: none;
}
.sortable li.mjs-nestedSortable-collapsed>ol {
display: none;
}
.sortable li.mjs-nestedSortable-branch>div>.disclose {
display: inline-block;
}
.sortable li.mjs-nestedSortable-collapsed>div>.disclose>span:before {
content: '+ ';
}
.sortable li.mjs-nestedSortable-expanded>div>.disclose>span:before {
content: '- ';
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.js"></script>
<script src="https://cdn.rawgit.com/furf/jquery-ui-touch-punch/master/jquery.ui.touch-punch.min.js"></script>
<script src="https://cdn.rawgit.com/mjsarfatti/nestedSortable/master/jquery.mjs.nestedSortable.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<div class="dd" data-bind="template: {name:'nodeTemplate', data: tree}"></div>
<script id='nodeTemplate' type='text/html'>
<div>
<span class="disclose"><span></span></span>
<span data-bind="text: id"></span>
Add child
</div>
<ol class="sortable ui-sortable" data-bind="foreach: { data: children, as: 'child' }">
<!-- ko if: child.children().length > 0 -->
<li class="mjs-nestedSortable-collapsed mjs-nestedSortable-branch" data-bind="template: {name:'nodeTemplate', data: child}, attr: { 'data-id': child.id }">
</li>
<!-- /ko -->
<!-- ko if: child.children().length == 0 -->
<li class="mjs-nestedSortable-leaf" data-bind="template: {name:'nodeTemplate', data: child}, attr: { 'data-id': child.id}">
</li>
<!-- /ko -->
</ol>
</script>

Knockoutjs: Invoking function of parent component from child component

Problem:
I'm trying to build a dashboard of widgets. Each widget will have a delete button on its header. When clicked on this button, corresponding widget have to disappear.
How I designed:
I have two knockout components.
my-widget-list:
VO will have an observableArray of widget objects.
my-widget:
VO will have details to display within the widget.
Note: For simplicity, I'm replacing the widget object with just numbers.
ko.components.register('my-widget-list', {
viewModel : function(params) {
var self = this;
self.values = ko.observableArray([10,20,30,40,50]);
self.deleteWidget = function(obj)
{
self.values.remove(obj);
}
},
template: {element: 'my-widget-list-template'}
});
ko.components.register('my-widget', {
viewModel : function(params) {
var self = this;
self.value = params.value;
},
template: {element: 'my-widget-template'}
});
ko.applyBindings({});
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<my-widget-list></my-widget-list>
<script id="my-widget-list-template" type="text/html">
<div data-bind="foreach:values">
<my-widget params="value: $data"></my-widget><br>
</div>
</script>
<script id="my-widget-template" type="text/html">
<span data-bind="text: value"></span>
<button data-bind="click: $parent.deleteWidget">Delete</button>
</script>
Now, I want to invoke my-widget-list's deleteWidget function when the button is clicked.
I have thought about
Passing the parent view model reference into the child
Passing the parent function in the params attribute of the child component as a callback
But I wish to know from experts what's the best way to achieve this.
JsFiddle Link
Thanks in advance

You can pass in the parent as a param to the child:
ko.components.register('my-widget-list', {
viewModel : function(params) {
var self = this;
self.values = ko.observableArray([10,20,30,40,50]);
self.deleteWidget = function(obj) {
self.values.remove(obj);
}
},
template: {element: 'my-widget-list-template'}
});
ko.components.register('my-widget', {
viewModel : function(params) {
var self = this;
self.value = params.value;
self.remove = function () {
params.parent.deleteWidget(self.value);
};
},
template: {element: 'my-widget-template'}
});
ko.applyBindings({});
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<my-widget-list></my-widget-list>
<script id="my-widget-list-template" type="text/html">
<div data-bind="foreach:values">
<my-widget params="value: $data, parent: $parent"></my-widget><br>
</div>
</script>
<script id="my-widget-template" type="text/html">
<span data-bind="text: value"></span>
<button data-bind="click: remove">Delete</button>
</script>
But I'm not sure if that is a good idea, as it needlessly couples the child to the parent.
I'd recommend implementing the "remove" button in the parent, i.e. in <my-widget-list>, this way the widget can exist without a widget-list (or in a differently structured one) while the widget-list is in control of its children.
Compare window managers: They work the same way. The window manager draws the frame and the minimize/maximize/close buttons, while the window contents is drawn by the respective child process. That logic makes sense in your scenario as well.
Alternative implementation with removeWidget control in the parent:
ko.components.register('my-widget-list', {
viewModel : function(params) {
var self = this;
self.values = ko.observableArray([10,20,30,40,50]);
self.deleteWidget = function(obj) {
self.values.remove(obj);
}
},
template: {element: 'my-widget-list-template'}
});
ko.components.register('my-widget', {
viewModel : function(params) {
var self = this;
self.value = params.value;
},
template: {element: 'my-widget-template'}
});
ko.applyBindings({});
.widget-container {
position: relative;
display: inline-block;
padding: 10px 5px 5px 5px;
margin: 0 5px 5px 0;
border: 1px solid silver;
border-radius: 2px;
min-width: 40px;
}
.widget-buttons {
position: absolute;
top: 2px;
right: 2px;
}
.widget-buttons > button {
font-size: 2px;
padding: 0;
height: 15px;
width: 15px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<my-widget-list></my-widget-list>
<script id="my-widget-list-template" type="text/html">
<div class="widget-list" data-bind="foreach:values">
<div class="widget-container">
<div class="widget-buttons">
<button data-bind="click: $parent.deleteWidget">X</button>
</div>
<my-widget params="value: $data"></my-widget>
</div>
</div>
</script>
<script id="my-widget-template" type="text/html">
<div class="widget">
<span data-bind="text: value"></span>
</div>
</script>

Rendering a Star Rating System using angularjs

My app is in this Fiddle
I need to render a star rating system dynamically from a http service, where the current stars and maximum stars can vary with each case.
Is it a good idea to create arrays from $scope.current and
$scope.max - $scope.current and pass them and run ng-repeat over them, or there is a more optimised solution than this.
Iteration ng-repeat only X times in AngularJs

Star Rating can be done either statically (read-only) or dynamically
If you want just simply to display Rating as star then try the below one
Static Star Rating
Working Example
html
<body ng-app="starApp">
<div ng-controller="StarCtrl"> <span ng-repeat="rating in ratings">{{rating.current}} out of
{{rating.max}}
<div star-rating rating-value="rating.current" max="rating.max" ></div>
</span>
</div>
</body>
script
var starApp = angular.module('starApp', []);
starApp.controller('StarCtrl', ['$scope', function ($scope) {
$scope.ratings = [{
current: 5,
max: 10
}, {
current: 3,
max: 5
}];
}]);
starApp.directive('starRating', function () {
return {
restrict: 'A',
template: '<ul class="rating">' +
'<li ng-repeat="star in stars" ng-class="star">' +
'\u2605' +
'</li>' +
'</ul>',
scope: {
ratingValue: '=',
max: '='
},
link: function (scope, elem, attrs) {
scope.stars = [];
for (var i = 0; i < scope.max; i++) {
scope.stars.push({
filled: i < scope.ratingValue
});
}
}
}
});
If you want to do Star Rating dynamically try this out
Dynamic Star Rating
Working Demo
Html
<body ng-app="starApp">
<div ng-controller="StarCtrl"> <span ng-repeat="rating in ratings">{{rating.current}} out of
{{rating.max}}
<div star-rating rating-value="rating.current" max="rating.max" on-rating-selected="getSelectedRating(rating)"></div>
</span>
</div>
</body>
script
var starApp = angular.module('starApp', []);
starApp.controller('StarCtrl', ['$scope', function ($scope) {
$scope.rating = 0;
$scope.ratings = [{
current: 5,
max: 10
}, {
current: 3,
max: 5
}];
$scope.getSelectedRating = function (rating) {
console.log(rating);
}
}]);
starApp.directive('starRating', function () {
return {
restrict: 'A',
template: '<ul class="rating">' +
'<li ng-repeat="star in stars" ng-class="star" ng-click="toggle($index)">' +
'\u2605' +
'</li>' +
'</ul>',
scope: {
ratingValue: '=',
max: '=',
onRatingSelected: '&'
},
link: function (scope, elem, attrs) {
var updateStars = function () {
scope.stars = [];
for (var i = 0; i < scope.max; i++) {
scope.stars.push({
filled: i < scope.ratingValue
});
}
};
scope.toggle = function (index) {
scope.ratingValue = index + 1;
scope.onRatingSelected({
rating: index + 1
});
};
scope.$watch('ratingValue', function (oldVal, newVal) {
if (newVal) {
updateStars();
}
});
}
}
});
There is a wonderful tutorial here for more explanation about Angular Star Rating

You can even try angular-ui. Here is the link.
Just need to add this tag.
<rating ng-model="rate" max="max"
readonly="isReadonly"
on-hover="hoveringOver(value)"
on-leave="overStar = null">

//Controller
var starApp = angular.module('starApp', []);
starApp.controller('StarCtrl', ['$scope', function ($scope) {
$scope.maxRating = 10;
$scope.ratedBy = 0;
$scope.rateBy = function (star) {
$scope.ratedBy = star;
}
}]);
.rating {
color: #a9a9a9;
margin: 0;
padding: 0;
}
ul.rating {
display: inline-block;
}
.rating li {
list-style-type: none;
display: inline-block;
padding: 1px;
text-align: center;
font-weight: bold;
cursor: pointer;
}
.rating .filled {
color: blue;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<body ng-app="starApp">
<div ng-controller="StarCtrl">
<ul class="rating">
<li ng-repeat="n in [].constructor(maxRating) track by $index">
<span ng-click="rateBy($index+1)" ng-show="ratedBy > $index" class="filled">★</span>
<span ng-click="rateBy($index+1)" ng-show="ratedBy <= $index">★</span>
</li>
</ul>
</div>
</body>

You could hold an array of objects like so:
var starApp = angular.module('starApp',[]);
starApp.controller ('StarCtrl', ['$scope', function ($scope) {
$scope.ratings = [];
var rating = {
current : 5,
max : 10
}
$scope.ratings.push(rating); // instead you would push what your http service returns into thearray.
}]);
Then in your view you could use ng-repeat like so:
<body ng-app="starApp">
<div ng-controller="StarCtrl">
<span ng-repeat="rating in ratings">{{rating.current}} out of {{rating.max}}</span>
</div>
</body>

My minimalistic approach:
The view
<head>
<!-- alternatively you may use another CSS library (like FontAwesome) to represent the star glyphs -->
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"></link>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0-rc.2/angular.min.js"></script>
<!-- insert the JavaScript controller and the CSS enhancements here -->
</head>
<body>
<div ng-app="StarRatings">
<div ng-controller="myController as ctrl">
<div ng-repeat="n in ctrl.getStarArray()" ng-class="ctrl.getClass(n)" ng-mouseover="ctrl.setClass($event,n)"> </div>
<p>
You have chosen {{ctrl.selStars}} stars
</p>
</div>
</div>
</body>
Note: if you want to use the onClick event instead onMouseOver event then replace ng-mouseover with ng-click in the HTML above.
The controller
<script>
(function() {
var app = angular.module('StarRatings', []);
app.controller('myController', function() {
this.selStars = 0; // initial stars count
this.maxStars = 5; // maximum number of stars
// a helper function used within view
this.getStarArray = function() {
var result = [];
for (var i = 1; i <= this.maxStars; i++)
result.push(i);
return result;
};
// the class used to paint a star (filled/empty) by its position
this.getClass = function(index) {
return 'glyphicon glyphicon-star' + (this.selStars >= index ? '' : '-empty');
};
// set the DOM element class (filled/empty star)
this.setClass = function(sender, index) {
this.selStars = index;
sender.currentTarget.setAttribute('class', this.getClass(index));
};
});
})();
</script>
Optionally some CSS enhancements
<style>
.glyphicon {
color: gold;
cursor: pointer;
font-size: 1.25em;
}
</style>
Not convinced? Try this JSFiddle: https://jsfiddle.net/h4zo730f/2/

let app = angular.module ('myapp',[])
-
##star Rating Styles
----------------------*/
.stars {
padding-top: 10px;
width: 100%;
display: inline-block;
}
span.glyphicon {
padding: 5px;
}
.glyphicon-star-empty {
color: #9d9d9d;
}
.glyphicon-star-empty,
.glyphicon-star {
font-size: 18px;
}
.glyphicon-star {
color: #FD4;
transition: all .25s;
}
.glyphicon-star:hover {
transform: rotate(-15deg) scale(1.3);
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.1/angular.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div ng-app= "myapp" >
<div class="stars">
<div id="stars" class="star">
<span ng-repeat="x in [0,1,2,3,4,5]" ng-if="($index < 4)" class="glyphicon glyphicon-star"> </span>
<span ng-repeat="x in [0,1,2,3,4,5]" ng-if="($index >= 4 && $index < 5) " class="glyphicon glyphicon-star-empty"></span>
</div>
</div>
</div>

hmc.starRating.js
angular.module('starRatings',[]).directive('starRating', function () {
return {
restrict: 'A',
template: '<ul class="rating">' +
'<li ng-repeat="star in stars" ng-class="star">' +
'\u2605' +
'</li>' +
'</ul>',
scope: {
ratingValue: '=',
max: '='
},
link: function (scope, elem, attrs) {
console.log(scope.ratingValue);
function buildStars(){
scope.stars = [];
for (var i = 0; i < scope.max; i++) {
scope.stars.push({
filled: i < scope.ratingValue
});
}
}
buildStars();
scope.$watch('ratingValue',function(oldVal, newVal){
if(oldVal !== newVal){
buildStars();
}
})
}
}
});
<script src="hmc.starRating.js"></script>
**app.js**
var app = angular.module('app', ['ui.bootstrap', 'starRatings']);
**indix.html**
<div star-rating rating-value="7" max="8" ></div>
.rating {
color: #a9a9a9;
margin: 0 !important;
padding: 0 !important;
}
ul.rating {
display: inline-block !important;
}
.rating li {
list-style-type: none !important;
display: inline-block !important;
padding: 1px !important;
text-align: center !important;
font-weight: bold !important;
cursor: pointer !important;
width: 13px !important;
color: #ccc !important;
font-size: 16px !important;
}
.rating .filled {
color: #ff6131 !important;
width: 13px !important;
}

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