ng model dynamic variable name

The text area tag is used to define a multi-line text input control. rev2023.4.5.43379.

The ng-model Directive With the ng-model directive you can bind the Using Pipes within ngModel on INPUT Elements in Angular. Copyright - Guru99 2023 Privacy Policy|Affiliate Disclaimer|ToS, AngularJS Routing Example with Parameters, AngularJS AJAX Make AJAX Call using $http, AngularJS Table: Sorting, OrderBy & Uppercase Filter [Examples], What is $Scope in AngularJS? The ng-model directive can be linked to a text area input control and multiline strings can be passed from the controller to the view. Dynamically Loading The ng-Template From Its Name In Angular 9 Vishal Gilbile May 18, 2020 59.5k 5 3 DynamicNGTemplatedemo.zip Download Free .NET & JAVA The NgClass directive provides a myriad of ways to dynamically assign class names to elements or components. For instance, if we have a sample template in our HTML like below. To learn more, see our tips on writing great answers. Can't bind to 'ngModel' since it isn't a known property of 'input', Angular error: "Can't bind to 'ngModel' since it isn't a known property of 'input'", Dynamic template variable inside event binding. Let's get our hands dirty and dive into the code. WebW3Schools offers free online tutorials, references and exercises in all the major languages of the web. angular.module('app').controller('Page2Controller', . The ng-model directive can also be applied to the select element and be used to populate the list items in the select list. Thanks! We can execute any statement inside of that binding that results in a string. or different error? The InputNumber component can I had edit my post. It must be the same; otherwise, it's not going to work. CC BY 3.0. For example, suppose you wanted to present a simple page to the end user like the one shown below which asks the user to enter the First name and Last name in textboxes. Is renormalization different to just ignoring infinite expressions? acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Full Stack Development with React & Node JS(Live), Android App Development with Kotlin(Live), Python Backend Development with Django(Live), DevOps Engineering - Planning to Production, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam. Date) or collections (e.g. Play around with your work and see how we can dynamically pass data between our front and back ends. Lets look at each of these in more detail. The first pair has a value of Controllers and the second has the value of Models. So now lets look at a simple example of how we can add the ng-model directive to a text area control. Is this a fallacy: "A woman is an adult who identifies as female in gender"? If the property in the ng-model attribute does not exist, Dealing with unknowledgeable check-in staff. The Form InputNumber Component is used to take numerical input from the user. My configuration was coming from a third party service. Heres some typescript code that creates a Set named classes: In this tutorial, we went over some of the most common ways to dynamically assign a CSS class to an element using the NgClass directive. SSD has SMART test PASSED but fails self-testing. Here we are attaching the member variable to the scope object called pDescription and putting a string value to the variable. ABD status and tenure-track positions hiring. Plagiarism flag and moderator tooling has launched to Stack Overflow! What doesn't work? To work with the ngModule you need to import the FormModule. Using Angulars built-in ng-model directive is fantastic for easily updating values, whether it comes from our back-end, or our front-end web pages. Before we get into how to use the NgClass directive, it would be instructive to look at its definition: Looking at the above code, we can now see that the [class] syntax that used earlier is actually part of the NgClass directive, via @Input(class). Here we are defining our first checkbox Controllers which is attached to the member variable Topics.Controllers. In AngularJS, this is done for us, and it is INCREDIBLY useful. WebJava Variable expected inside a for loop. It can be clearly seen that the value assigned to the pDescription variable as part of the scope object was passed to the textarea control. The NgClass directive provides a myriad of ways to dynamically assign class names to elements or components. Clearly this is a very basic example, but the idea remains the same for data binding in AngularJS! Angular PrimeNG is a UI component catalog for angular applications. on their status: The ng-model directive adds/removes the following classes, according to the For whatever reason, the Set ngClass signature never really caught on. Start here. } A typescript Set allows us to store distinct values into a List using methods such as add(), has(), and delete(). The ng-init directive is added to our div tag to define a variable called chapters which is an array variable containing 3 strings. I came accross this requriement when, in one of my projects, my task was to load an ng-template from its name. How to put a variable in attribute/property binding in Angular 2+? How to use dynamic variables in ngModel? Can my UK employer ask me to try holistic medicines for my chronic illness? read the end of life announcement. A Computer Science portal for geeks. Angular. Example 2: This example describes the ng-model Directive in AngularJS, where we have bound the ngModel directive with getter and setter. All Rights Reserved As well see, the real reason to use the NgClass directive is that it can help us choose between multiple classes. The DynamicFormComponent component presents a list of questions by binding each one to an element that matches the DynamicFormQuestionComponent. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:

, W3Schools is optimized for learning and training. B-Movie identification: tunnel under the Pacific ocean. We would mostly need dynamic ngModel in the case of dynamic text box creation. In your ts file export class AppComponent { What is the expected behavior? Parser Error: Got interpolation ({{}}) where expression was expected at column 0 in [{{bumpDetail.name}}] in ng:///AppModule/SettingComponent.html@129:59 ("p *ngFor="let bumpDetail of bumpDetail">, [] and {{}} are never used together. This allows us to set one or more classes based on a condition: We could also build the class name at runtime: Some consider the above class toggling technique to be a little more complicated than it needs to be as the inactive-class would probably be the default. WebWebsite Builders; big ten network streaming online free. For this what I did was I created a component wherein I'll keep all of my ng-templates & I'll decorate each of the ng-templates with my custom attribute directive. //representsthestyletobeappliedonTableCell, //representsthestyletobeappliedonControl, , , element and set it to "name", which makes sense for the hero's name. Its point is to repeat a given HTML template once for each value in an array, each time passing it the array value as context for string interpolation or binding. The ngModel directive stores a variable by reference, not value. It can also be used to achieve {{}} is for string interpolation only. How to open popup using Angular and Bootstrap ? obj[prop]=AppUtility.convertNgStyleStringToObject(x[prop].toString()); .columns.filter(x=>x.isVisible).sort(x=>x.order).map(x=>x.field); getTemplate(ngTemplateName:string):TemplateRef{. How many unique sounds would a verbally-communicating species need to develop a language? Let's practically try to see whether it works or not. Below is the code-snippet for our cell-template.component.ts file, where we try to resolve the template reference from its name in getTemplate method. And when called with a parameter it sets the value. rev2023.4.5.43379. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Angular uses the assigned name to register the element with the NgForm directive attached to the parent element. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. or download the jar file from the location https://jar e-mail, required): In the example above, the span will be displayed only if the expression in How to convince the FAA to cancel family member's medical certificate? To learn more about modularizing your business logic code using Angular Services, read my other post, here. The checkbox will not be marked for this check control. The following is the list of classes for validation purposes: Binding ngModel with getter and setter: Whenever a function is called with zero arguments then it returns a representation of the model. # Install Angular CLI. I have pasted my code snippet down below. I feel like I'm pursuing academia only because I want to avoid industry - how would I know I if I'm doing so? Checked = true. Secondly i think there might be something wrong here

verify that the name of your variable is correct, and these 2 can't be the same. We can do this using NgModel, one of the core features of Angular. Do (some or all) phosphates thermally decompose? Then, update your template like

In order to make URL and email print, we have to write a valid email/URL only then it would get printed. A website to see the complete list of titles under which the book was published, Please explain why/how the commas work in this sentence, B-Movie identification: tunnel under the Pacific ocean. Also notice that the NgClass directive gives us no less than four options for setting dynamic classes! This isn't exactly a bug with ui-select.This is sort of a 'symptom' of the latest versions of AngularJS. Now we're going to have a look at the output. Today we shall be looking at how we can dynamically load an ng-template from its name. Seal on forehead according to Revelation 9:4. Now to reference this template in our HTML, we can simply use the below code snippet: You can also pass context values to the ng-template if needed by using the ngTemplateOutletContext property. and Could anyone please help me by checking it and tell me where I have done wrong? ng-model is a directive in Angular.JS that represents models and its primary purpose is to bind the view to the model. All you need is the ngModel selector to activate it. qtd:any[] = {}; Advertise with TechnologyAdvice on Developer.com and our other developer-focused platforms. The ng-model directive will ensure that the data in the view and that of your model are kept in sync the whole time. Here is the code snippet for our configuraton file. Second, it passes the data from UI after a specific action is triggered and then changes the value of the control. When we bind this custom attribute on our ng-template we pass the name of the template as property binding to it & the template reference is bound to template property of our custom attribute. Having said that, the Set should contain strings representing class names to apply to the element or component. HTML forms using the ng-model directive: We can define ngModel in the following way by writing the below code in the app.component.html file. Documentation licensed under Something like this works fine in my case: In html i used index instead of value (num): We would mostly need dynamic ngModel in the case of dynamic text box creation. How to detect when an @Input() value changes in Angular? I have never used it, nor do I know of anyone who has. If you are still unsure of how any of it works, take a look at the demo below. How to solve this seemingly simple system of algebraic equations? Why can a transistor be considered to be made up of diodes? Now, if a condition comes that we want not true/false but some other value on checkbox checked or unchecked than we can use ng-true-value and It will be useful if we keep a practice of using getter and setter for models when there is an internal representation as the getter and setter function gets more often called as compared to the rest of the parts of the code. To represent property binding, we use a pair of square brackets [ ] with the field name. qtd3 = 'qtd3'; How is the ng-init directive used in angular? If the code is executed successfully, the following Output will be shown when you run your code in the browser. Property binding is used to pass the data from the component class (component.ts) and set the value of the element in the front end. There was an error loading this resource. Tutorial with Function (Examples), AngularJS ng-repeat Directive with Example. Supplying the ternary operator to ngClass allows us to specify two different classes: one if an expression is true and one for false. I This data is loaded from an employee-data-store.service which has some dummy records. Asking for help, clarification, or responding to other answers. Keeping the data in sync between the UI and control is very important in a form. Event binding is used to change the data in the component class after a particular action. I've been looking for the right answer for a few hours! Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, it works very well! DISCLAIMER: Well be using a website that has been set up already. To set up your website to be a Single Page Application, follow my steps in another post, here. In this guide, we've learned about an essential topic of template-driven forms. Example 1: This example describes the basic usage of the ng-model Directive in AngularJS. Here I've used an input tag, but you can choose any tag of your choice. Why do digital modulation schemes (in general) involve only two carrier signals? You can use the ng-model directive to map the text box fields of First name and Last Name to your data model. There is an error in [(ngModel)]={{bumpDetail.name}} It should be: [(ngModel)]="bumpDetail.status" You don't need {{}} when using [(ngModel)] Note that we are putting the /n literal in the string so that the text can be of multiple lines when it is displayed in the text area. In Angular, We will use ngModel for two way data binding.. to a variable created in AngularJS. This helps you CC BY 3.0. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How is cursor blinking implemented in GUI terminal emulators? Making statements based on opinion; back them up with references or personal experience. Improving the copy in the close modal and post notices - 2023 edition. 1.1 What is the purpose of the ViewChild decorator in this component class? Table of Content. WebThis directive can be used by itself or as part of a larger form. } If you want to create a dynamic form, take a look at reactive forms. These values will be passed to select input tag in the view.If the code is executed successfully, the following Output will be shown. The core directives ng-container, ng-template and ngTemplateOutlet all combine together to allow us to create highly dynamical and customizable components. This is much easier than using something like getElementById, right? As you can see in our custom attribute directive we've one Input property named "appCtrlTemplate" & a public property templates of type TemplateRef. The MIT License. dirty, touched, error): The ng-model directive provides CSS classes for HTML elements, depending ( Weve just created a two-way data bound variable using Angular and the ng-model directive! Binds the given expression to the value of the element. Does disabling TLS server certificate verification (E.g. Is RAM wiped before use in another LXC container? 2023 C# Corner. Lets look at an example of how we can use the ng-model with the textbox and checkbox input type. A Computer Science portal for geeks. Unchecked = false. Here we will have a text input type which will have the name of Guru99 and there will be 2 checkboxes, one which will be marked by default and the other will not be marked. If you fall into that camp, you can employ the [class.class-name] syntax to supply a condition to be evaluated: So, if we can conditionally set a class using [className] Property Binding, why do we even need the NgClass directive? You must have the name attribute in the tag and the crucial NgModel directive. Here we will have a text input type which will have the name of Guru99 and there will be a select list with 2 list items of Controller and Models. And then you wanted to ensure that you store the information that the user has entered in your data model. ( Lets use our page2.html for this purpose: Here we can see our value1 is bound using our directive mentioned earlier, ng-model, and some code updating our value with the ng-click directive on the increment button. I am facing some problem when use ngModel to emit value to bump object with property get from bumpDetail.name array. It is especially useful for dynamically generated lists using ngRepeat, as shown below.. How is the ng-init directive used in angular? How to create button dynamically with click event in Angular ? In this post, Ill show you how to utilize Angulars two-way data binding and create more responsive, modern web applications. Japanese live-action film about a girl who keeps having everyone die around her in strange ways. Visit angular.io for the actively supported If the variable specifies a name on the right-hand side, such as #var= ngModel , the variable refers to the directive or component on the element with a matching exportAs name. The ngModel directive is a directive that is used to bind the values of the HTML controls (input, select, and textarea) or any custom form controls, and stores the AngularJS support has officially ended as of January 2022. 2022 TechnologyAdvice. The ng-model directive can be linked to input controls like the text and checkbox controls to make them more dynamic at run time. The various form input types (text, checkbox, radio, number, email, URL, date, datetime-local time, month, week) can be used with the ngModel directive. Since ngModel refers to address that is why it does not save the changed value in the object itself rather it saves it in some internal state (variable-name.value). The reverse is also true; If we update our variable value1 using some code or business logic, this value will update on all its instances in the view (web page) for the user. Please try again later. the ng-show attribute returns true. Can a handheld milk frother be used to make a bechamel sauce instead of a whisk? As we set the value of the variable username in the app.component.ts, our output should look like this: Depending on the value of the text box, the label below would change to match it. .cellTemplates.getTemplate(ngTemplateName); Build A Full-stack Web Application Using Angular And Firebase, Want to build the ChatGPT based Apps? TechnologyAdvice does not include all companies or all types of products available in the marketplace. It can be clearly seen that the value assigned to the pName variable is Guru99. Advertiser Disclosure: Some of the products that appear on this site are from companies from which TechnologyAdvice receives compensation. $ npm install -g @angular/cli # Create new project. Very nice! ngModel with dynamic variable Ask Question Asked 5 years, 4 months ago Modified 4 years, 7 months ago Viewed 13k times 5 I am facing some problem when use ngModel to emit value to bump object with property get from bumpDetail.name array. Finally here is our working demo, as we can see, each of our template is rendered dynamically from its name. You don't need {{}} when using [(ngModel)] or any other ng-directive for that matter. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Whenever a change happens in ngModel, Angular will trigger ngModelChange event.. We will create a component in our Angular project called NgModelChange.. export class NgmodelchangeComponent implements OnInit { user = new Why do digital modulation schemes (in general) involve only two carrier signals? The ngModel directive is a directive that is used to bind the values of the HTML controls (input, select, and textarea) or any custom form controls, and stores the required user value in a variable and we can use that variable whenever we require that value. Not the answer you're looking for? Do you observe increased relevance of Related Questions with our Machine What is the syntax for Typescript arrow functions with generics? The ng-model directive can also be applied to the input elements such as the text box, checkboxes, radio buttons, etc. NgModel is a directive that creates the FormControl instance from a domain model and binds it to a form control element. The NgModel doesn't support tags like , . Here is our sample code-snippet for my cell-template component, wherein we kept all of our ng-templates. Here is the code-snippet for my custom attribute directive. Table of Content. is there a possibility to get typesafety on this? ; In this example, we want to show how we can pass a multiline string from the controller to the view and attach that value to the text area control. The ng-model directive can also be applied to the select element and be used to populate the list items in the select list. The ng-repeat element is used The Form InputNumber Component is used to take numerical input from the user. The DynamicFormComponent component is the entry point and the main container for the form, which is represented using the in a template. The ng-model directive can also be used to populate a select list with options which can be displayed to the user. Note This directive is the successor of Angular 1s ng-repeat directive. See what ending support means Snowflake sql table name wildcard. I believe in the past this didn't use to be the case (not sure). Then your template mig In this tutorial, well go over some of the most common ways to dynamically assign a CSS class to an element using the NgClass directive. WebSetting the ngModel name attribute through options link The following example shows you an alternate way to set the name attribute. The primary purpose of this directive is to bind the view to the model. It consists of a wide range of UI components that help in making fast and scalable websites. I can add dynamic model value but i can't change that dynamic value. Since the first check value is true it passed, the checkbox is marked for the Controllers checkbox. If the variable specifies a name on the right-hand side, such as #var= ngModel , the variable refers to the directive or component on the element with a matching exportAs name. If the user changes the value inside the input Should I (still) use UTC for all my servers? https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js, https://docs.angularjs.org/api/ng/directive/ngModel. Its syntax is both concise and yet supports fairly complex logic to provide us with fine-grained control over both our class names as well as the criteria for setting them. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. NgModel works using these two bindings together. qtd:any[] = {}; Thank you. What is the best way to put more than 1 ternary conditional class in angular's ngClass directive, where the values are the class-names? The radio button once selected wont get deselected since, in the function of c, we are setting the value of choice as true. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Inside our .ts file, we can set to a known class name such as text-success or text-failure based on the result of some operation: The array syntax is useful for applying multiple classes to the same element or component: A slightly more advanced yet highly useful method of using ngClass is to provide an expression. Interpolation only please help me by checking it and tell me where i have used... Ngmodel name attribute through options link the following Output will be shown Related questions our. Use ngModel to emit value to bump object with property get from bumpDetail.name.. True and one for false all ) phosphates thermally decompose to represent binding! Add the ng-model directive to a variable called chapters which is an adult who as. Wide range of UI components that help in making fast and scalable websites is to bind the view that... First name and Last name to register the element with the field.! ) use UTC for all my servers here, an attribute identified as name is used to the... How we can use the ng-model attribute does not exist, Dealing with unknowledgeable check-in staff this into! Use to be the case of dynamic text box, checkboxes, radio,. Map the text box fields of first name and Last name to your model... As we can define ngModel in the close modal and post notices - 2023 edition myriad of to. In AngularJS, this is n't exactly a bug with ui-select.This is sort of a whisk property! Are kept in sync between the UI and control is very important in a form control element to. Controller to the pName variable is Guru99 ng-model with the NgForm directive attached the. All types of products available in the select list with options which can be linked to a in! That matches the DynamicFormQuestionComponent two-way data binding in AngularJS, this is done for us, and examples are reviewed... An expression is true it passed, the checkbox is marked for this check control this check control and... Select input tag, but you can also do it this way if you 're working a. Mindful of when buying a frameset of dynamic text box creation variable created in AngularJS chronic illness which. Can define ngModel in the code is executed successfully, the following Output will be shown means sql!, this is done for us, and examples are constantly reviewed avoid! Cursor blinking implemented in GUI terminal emulators to elements or components checkbox will not marked! Make them more dynamic at run time an example of how we can dynamically pass data our. Custom attribute directive get typesafety on this site including, for example, the set should strings... Updating values, whether it comes from our back-end, or our front-end web pages } Thank... In making fast and scalable websites is fantastic for easily updating values, it... Cursor blinking implemented in GUI terminal emulators past this did n't use to be a Page! A verbally-communicating species need to develop a language range of UI components that in! This post, Ill show you how to create button dynamically with click event in Angular of algebraic equations learned... Below.. how is the successor of Angular thermally decompose stores a variable created in AngularJS this! 'Re going to have a look at the Output What ending support means Snowflake table. This using ngModel, one of my projects, my task was to load an ng-template from its.. Some or all ) phosphates thermally decompose use to ng model dynamic variable name made up of?... Whole time avoid errors, but you can also be applied to the scope object called pDescription putting! Cell-Template component, wherein we kept all of our template is rendered from... Warrant full correctness of all content } is for string interpolation only been... Binds it to a variable by reference, not value name is used to populate a select list of larger. You want, in case you want to Build the ChatGPT based Apps { { } } using. Ternary operator to NgClass allows us to specify two different classes: one if an expression, must... Tell me where i have done wrong for that matter you wanted to ensure you... Unsure of how we can execute any statement inside of that binding that results in form. We kept all of our ng-templates for a few ways of accomplishing this, but can! Part of a wide range of UI components that help in making fast scalable... Them more dynamic at run time highly dynamical and customizable components receives compensation case ( not sure.. Is only applied if a variable in attribute/property binding in AngularJS for my... Dummy records span >, < script src= '' Page2Controller.js ng model dynamic variable name > < >! I came accross this requriement when, in one of the form InputNumber component can i had my... Getting the same for data binding.. to a text area control the tag and crucial! Without using a website that has been set up already and many, many more UI! Person kill a giant ape without using a website that has been set up already that results a... An @ input ( ) value changes in Angular, we will use ngModel to emit to! Our template is rendered dynamically from its name small parts should i be mindful when! We 've learned about an essential topic of template-driven forms define a multi-line text input and... Data between our front and back ends copy in the following way by writing the below in! < span >, < label > model value but i ca n't that... Code is executed successfully, the order in which they appear can also be applied to the.. And many, many more example shows you an alternate way to set the name attribute = 'qtd1 ' What! The controller to the element or component transistor be considered to be made up of diodes has entered in data. A language and tell me where i have never used it, nor do know... Field name name attribute each one to an < app-question > element that matches the.... Member variable Topics.Controllers to allow us to specify two different classes: one if an,... N'T need { ng model dynamic variable name } fields of first name and Last name to register the.... Improving the copy in the marketplace this a fallacy: `` a is! Developer-Focused platforms ) ] or any other ng-directive for that matter film about girl! Input should i be mindful of when buying a frameset like html,,... If an expression is true it passed, the set should contain ng model dynamic variable name representing class to... The pName variable is Guru99 variable Topics.Controllers RSS feed, copy and paste this URL into your RSS.. It comes from our back-end, or our front-end web pages l by... It must be the case ( ng model dynamic variable name sure ) where i have done?. Keeping the data in FormControl ngFor= '' l Super-powered by Google 2010-2020 are you getting the same data! Take numerical input from the user ; Thank you any [ ] with the field name 's get our dirty... This requriement when, in case you want an id matching the index element in reactive forms ca n't that! Case you want an id matching the index a Single Page Application, follow my steps in another LXC?! Develop a language brackets { } } is for string interpolation only that creates FormControl... Is triggered and then changes the value parts should i be mindful when... Ngmodule you need to import the FormModule list items in the select element and be used define! This site including, for example, but you can use the ng-model directive to the! Its name file export class AppComponent { What is the code-snippet for our file... Was coming from a domain model and binds it to a variable called chapters which attached... $ npm install -g @ angular/cli # create new project ng-repeat element used... Medicines for my chronic illness my servers: Well be using a website that has been set your... Way data binding.. to a form control element available in the select element and be used achieve! Your ts file export class AppComponent { What is the syntax for Typescript arrow functions with generics larger form }! The crucial ngModel directive with getter and setter especially useful for dynamically generated lists ngRepeat... Input controls like the text area control like the text box creation our! Binding is used to make them more dynamic at run time template is dynamically... User has entered in your ts file export class AppComponent { What is the ng-init used! Very important in a string any of it works or not our template is dynamically! ).controller ( 'Page2Controller ', < label > exist, Dealing with unknowledgeable staff. As shown below.. how is the code-snippet for my chronic illness { }! Tooling has launched to Stack Overflow same for data binding in Angular the ChatGPT based?! When called with a template-driven form, you must have the name attribute through options link the following shows... The first check value is true it passed, the set should contain strings representing class names to to! Tutorial with Function ( examples ), AngularJS ng-repeat directive directive provides a myriad of ways to assign... Evaluates totrue - 2023 edition n't support tags like < span >, < label > that help making...: one if an expression, you must provide an object using curly brackets { } and changes. Here is the ngModel selector to activate it now lets look at each of these in detail... Practically try to see whether it comes from our back-end, or our front-end web.... Variable called chapters which is attached to the element with the field name be to.