I hope after knowing the pros, cons & limitations of dot notation. Private Methods In TypeScript / Angular 2, Maintaining Proper Type-Checking With Callbacks Using TypeScript In Angular 2 RC1, Better Type Checking With In-Browser TypeScript Transpiling In Angular 2, Building Angular 2 Demos With System.js And TypeScript, My Experience With AngularJS - The Super-heroic JavaScript MVW Framework. Dot notation; Bracket notation; Dot Notation. Examples of incorrectcode for this rule: Examples of correctcode for this rule: You can simply use both dot and bracket to access the property without need of variable. CodeTidbit by SamanthaMing.com. You can find a lot of discussion in the link below. And, in fact, Thankfully, Brandon Roberts was online and available to save the day! A javascript variable is a storage to store values like string, number, array, object, etc. Square bracket notation allows access to properties containing special characters and selection of properties using variables Another example of characters that can't be used with dot notation is property names that themselves contain a dot. Object Access: Bracket-Notation vs. Dot-Notation With TypeScript In Angular 2 RC 4 - app.component.ts The simple fix for that is to switch to bracket notation: Dot-Notation. This is only true for objects that are loosely defined as a set of string-based keys. Both notations can access object properties. TypeScript 2.2 removes that restriction. First, let’s look at what is identifiers ? I just want to know why dot notation doesn't work. 205. Which says, always use Dot Notation . Always use Dot Notation because it’s fast & readable. But if you’re dealing with invalid identifiers or variables, use the Bracket notation. I also rock out in JavaScript and ColdFusion (In the ECMAScript standard, the names of properties are technically "IdentifierNames", not "Identifiers", so reserved words can be used but are not recommended). Always use Dot. But the question is always which one should I use . Always use Dot. But it becomes another limitation to dot notation. Here’s is the final thought on which one is better. I prefer square bracket notation for conceptually indexing into a map/dictionary type rather than accessing a 'direct' property. It gives us a morale boost to remain to continue. Why because there are some main reasons to use it. As such, it will warn when it encounters an unnecessary use of square-bracket notation. the case. "testcase": data.finding["testcase"], [‘testcase’] is better written in dot notation. But it doesn’t mean that we need a special case for bracket notation. if you want instead the property with the name held by the variable prop you need to use bracket notation obj[prop], in this way it will first get the value from inside the variable and then access the property Dot notation is faster to write and clearer to read. - takes the input as a literal name of the property square bracket notation [] - evaluates the input first and that evaluation is considered to be the name of the property you can’t access array’s items (= properties!) Example: object.key Get an element from an object by separating the object-name and the key-name by a dot(.). Dot notation. When dealing with these kinds of objects in vanilla JavaScript, we can usually use either one of two notations: Dot-notation, ex: data.foo. Meaning, most of the time, you can use either type of access notation. ts-dot-prop. Wonder no more, just follow Airbnb's style guide. However, the dot notation is often preferred because it is easier to read, less verbose, and works better with aggressive JavaScript minimizers. But then we have a bracket notation, if dot notation is good to use. Both notations can access object properties. This didn’t make sense to me. So, person.x looks for the property of person with the key of "x". But, in Angular 2, if I'm consuming something that's part of the core, unfortunately, I'm not sure I can get around this. Below is the example. http = 80; you understand it, it gives you immediate, precise and comprehensive summaries of how code behaves Now, the issue with dot notation is that it only works with validate identifiers. Define the data as follow and be happy:private data : IData | Object; Or, if you are going to use it in alot of places, define IData as follow: Export type IData = { [ key: string ]: any;} | Object; Ah, interesting. What is that? In the object.property syntax, the property must be a valid JavaScript identifier. During linting my code jshint gave me the “hint” that I should prefer dot notation over bracket notation. To frankly speaking, just go with Dot Notation . We’ll get back to the angle brackets notation (Array) later. Dot notation is faster to write and clearer to read. When dealing with these kinds of objects in vanilla JavaScript, we can usually use either one of two notations: For all intents and purposes, these two notations are functionality equivalent (although you sometimes have to use the bracket-notation). Dot notation. This is a weird gotcha that I could see myself getting stuck on as well. I am trying to figure out why console prints undefined when I use dot notation when why it prints values of each key when I use bracket notation. Although we usually use dot notation, there are some times when we must use bracket notation - namely, when the we want to access is referenced by a variable. Let’s look at the same object with bracket notation. Most of the time, in TypeScript, objects have narrowly defined interfaces. But there is also another scenerio where variable with dot and bracket give different values. The dot notation and bracket notation both are used to access the object properties in JavaScript. (portNumbers as any). To participate in our javascript quiz or challenges, tutorial, tips & tricks make sure to join our jsstartup newsletter. workflow platform. Object Access: Bracket-Notation vs. Dot-Notation With TypeScript In Angular 2 RC 4 - app.component.ts Let’s look at the example of dot & bracket notation. Dot- vs Bracket-Notation. So, when you use the dot notation, JS expect for a key whose value is a string or whatever is after the dot. I switched over to this type-driven super-set of JavaScript, Using Import = Require Syntax With TypeScript 2.2 In Angular 2.4.9, Building JavaScript Demos With System.js, TypeScript 2.2.1, And Angular 2.4.9, Using ANY Type Prevents Function Parameter Type-Checking In TypeScript 2.1.5, Using NgOnChanges Collection With Dot-Notation And TypeScript In Angular 2.4.4, Injecting "Newable" Classes Using TypeScript And Dependency-Injection In Angular 2.4.1, Adding Custom Typings Files (*.d.ts) In An Angular 2 TypeScript Application, Thinking About Static vs. There are two ways to access the object properties. But, I do find that I spend a decent amount of time "just" getting "working JavaScript" to validate properly in TypeScript. But it doesn’t mean that we need a special case for bracket notation. With dot notation, it's easier for me to remember the correct syntax. Object Access: Bracket-Notation vs. Dot-Notation With TypeScript In Angular 2 RC 4. by SSWUG Research (Ben Nadel) When I started learning Angular 2, I did so in the context of ES5. Both notations can access object properties. This is a plain-old JavaScript object; or a hash; or whatever you want to call it. You can simply use both dot and bracket to access the property without need of variable. If you have any questions, please feel free to ask me in the comment section and also let me know if you have any suggestions. So let’s look at some cons or limitation of dot notation. code_thoughts. Wonder no more, just follow Airbnb's style guide. Installation npm install ts-dot-prop Usage Normally, TypeScript can infer the type of a variable if there is an assignment. I really do like TypeScript; but, in my studies, TypeScript is not a first-class citizen - I'm learning Angular 2 and, as a byproduct, I'm learning enough TypeScript to get the job done. So, you can able to participate in our daily challenges & learn the javascript concept. And, in fact, given the perviously defined interface, only one of them will validate. When I started learning Angular 2, I did so in the context of ES5. Save my name, email, and website in this browser for the next time I comment. Your email address will not be published. It's interactive, fun, and you can do it with your friends. 24x7 and I dream about chained Promises resolving asynchronously. 2642 Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the requested resource” error, while Postman does not? Presumably because the key is not explicitly defined as a string; though, of course, we all know that this is how JavaScript works. JavaScript property access: dot notation vs. brackets? Accessing them with [] is called “bracket notation”. dot notation . Bracket notation can run arbitrary JavaScript. I have to use the bracket-notation when accessing the "params" or I'll get TypeScript yelling at me. Yep , both can able to access the object property. Compare arrays and objects as data structures in JS? But the question is often which one should I use . Now, let’s looks at example with some identifier in object property with dot notation. But still which one is better and which one I should use . NOTE: This divergence is not generically true in TypeScript. Reason 4: Dot notation limits the usage of brackets In JavaScript, one can access properties using the dot notation (foo.bar) or square-bracket notation (foo["bar"]). For example, in the Angular 2 router, I can access the params associated with a route segment like this: ... this "params" object, if you look in the bowels of the source code, is defined as: export type Params = { [key: string]: any }; ... so, in this case, I don't think there's anyway around it. Your email address will not be published. What I want is to print the values of each key, so I use bracket notation. Definitions; Easy Examples; Practical Showcase - Iterating over an Object; Practical Showcase - Calling Functions from inside an Object-Literal; Content. Dot notation does not work with some keywords (like new and class) in internet explorer 8. Ben Nadel © 2021. Dot vs Bracket notation in JavaScript. Well dot notation is a little bit easier to read. See , both give different values because in bracket notation variable value act as property name which is ‘name‘ but in case of dot notation variable itself act as property whose value is ‘’. But our object person doesn't have a property called "x". And never use dot notation with variable. An identifier is a sequence of characters in the node that identifies a variable, function, or property. Wow , no issue happen with bracket notation. Both notations can access object properties. Dot Notation 2. As such, it's not unusual to see an object with a loosely defined, key-driven interface: Here, we're basically saying that this object is a collection of string-based keys that will reference values of any type. JavaScript object property can be access with dot notation as well as with the bracket notation. Bracket-notation, ex: data[ "foo" ] For all intents and purposes, these two notations are functionality equivalent (although you sometimes have to use the bracket-notation). which you saw in the previous example. Bracket Notation, Dot notation is used most frequently. Airbnb’s JavaScript Style Guide: Properties, JavaScript Quiz – function add without return keyword can sum. Square bracket notation allows access to properties containing special characters and selection of properties using variables Another example of characters that can't be used with dot notation is property names that themselves contain a dot . But, after much community push-back and some clear evidence that some of the code would be more readable with TypeScript, I switched over to this type-driven super-set of JavaScript. # Dot notation vs Bracket notation. Fascinating post by @BenNadel - Object Access: Bracket-Notation vs. Dot-Notation With TypeScript In Angular 2 RC 4. Ask Question Asked 5 years ago. I just want to know why dot notation doesn't work. Dot notation didn’t allow this, and was more restrictive with its We can access the property of an object by. What I want is to print the values of each key, so I use bracket notation. But the question is often which one should I use . return myObj.checkProp; returns an unidentified value but return myObj[checkProp]; works. Let’s get to understand Dot Notation’s issues which is the root to answer the question. Let’s access above object property with dot notation and as well with bracket notation. Typing Script is not so easy for all. Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any. And when you want to access object property with a variable, use Bracket On the other hand, the bracket notation can handle person[x], because of the way JS access the statements. Now, let’s look at the below example. Required fields are marked *. (In the ECMAScript standard, the names of properties are technically "IdentifierNames", not "Identifiers", so reserved words can be used but are not recommended). I have a reasonably good understanding of TypeScript basics: In general, I've studied the TypeScript home page tutorials, gone over significant portions of the TypeScript spec, read the "Definitive TypeScript Guide" web site, and followed a "Mastering TypeScript" video tutorial. This rule is aimed at maintaining code consistency and improving code readability by encouraging use of the dot notation style whenever possible. JS dot-notation vs. bracket notation - code_thoughts, So why do these options exist? This episode discusses the differences between dot notation syntax and square bracket syntax. Below is the example. Note: Always use bracket notation with variables. But it’s a little bit confusing to me. On the other hand, the bracket notation can handle person[x], because of the way JS access the statements. In this case, we actually have to help it, because with an empty Array, it can’t determine the type of the elements. The dot notation is used mostly as it is easier to read and comprehend and also less verbose. — the world's leading prototyping, collaboration & I had this code: //app.users is a hash app.users.new = { // some code } And this triggers the dreaded "expected indentifier" (at least on IE8 on windows xp, I havn't tried other environments). JavaScript Quiz – string length and number length what they return? And, I actually enjoy it. As, you can see in above example that variable value act as key in bracket notation but in case of dot notation variable itself act as property. Hey, I am Ajay Yadav. JavaScript Quickie— Dot Notation vs. Let’s look at the below example. Codecademy is the easiest way to learn how to code. TypeScript utility to transform nested objects using a dot notation path. I want to bring your attention to the fifth Require Dot Notation (dot-notation) The --fix option on the command line can automatically fix some of the problems reported by this rule. As, we already know that dot notation have some limitation in terms of accessing object properties. Due to which, bracket notation come in light . Run this demo in my JavaScript Demos project on GitHub. Square bracket notation was required prior to TypeScript 2.2. But, some objects cannot conform to such constraints - some objects are dynamic and driven by things like Router state. In this case, Brandon Roberts was able to show me that bracket-notation and dot-notation, while functionally equivalent in JavaScript, are not the same thing in TypeScript. Prepare your next javascript interview with daily javascript challenges & tutorial. Thanks for posting it! But our object person doesn't have a property called "x". Dot Notation’s Issues. Follow. If you use dot notation, javascript goes till this first dot and then starts to unbox the property after the dot. Can anyone confirm if that is true and if it is possible to circumvent this behavior. Typescript: bracket notation property access. There are two ways to access properties: dot notation and bracket notation. May 30, 2018, at 4:40 PM. I am the co-founder and a principal engineer at InVision App, Inc Dot notations is only work with valid identifiers. The main difference between dot notation and bracket notation is that the bracket notation allows us to access object properties using variable. There are two ways to access properties on an object: 1. Accessing members with “.” is called “dot notation”. In many situations, there'll no longer be a need for unpleasant workarounds like this: // Awkward! Issue working with invalid Identifiers; Issue working with Variables; 1. So, when you use the dot notation, JS expect for a key whose value is a string or whatever is after the dot. bracket notation seemed inherently more insecure than dot notation. Wonder no more, just follow Airbnb’s style guide. Mostly, we use dot notation for accessing object properties but in some cases, we have to use bracket notation. foo["bar"]; Rule Details. Willing to help or share my knowledge with everyone. That’s why Dot notation is used most frequently compared to Bracket notation. A s the name suggests, it’s using a “dot” to access the property of an object, more commonly referred to as dot notation. Convert JavaScript string in dot notation into an object reference , If one needs to convert dot-notation strings like "x.a.b.c" into references, it could strings don't contain commas or brackets, would be just be to match length 1+ Dot notation is much easier to read than bracket notation and is therefor used more often. # bracket notation df.groupby('col_two')['col_one'].sum() With bracket notation, I often forget whether there's supposed to be a period before ['col_one'], after ['col_one'], or both before and after ['col_one']. I am trying to figure out why console prints undefined when I use dot notation when why it prints values of each key when I use bracket notation. Always use Dot. All content is the property of Ben Nadel and BenNadel.com. # Dot notation vs Bracket notation. which should I use to access object property? Tell us what’s happening: Can anyone explain why it’s required that we utilize the bracket notation instead of the dot notation to get a valid return from the if statement? No one is perfect everyone has some pros and cons . foo["bar"]; Rule Details On User Experience (UX) Design, JavaScript, ColdFusion, Node.js, Life, and Love. This might work when I'm in control of the type declarations. In TypeScript, however, these two variants are not the same. In this case also, dot notation have some limitation. In JavaScript, one can access properties using the dot notation (foo.bar) or square-bracket notation (foo["bar"]). So, person.x looks for the property of person with the key of "x". JavaScript Quiz – does replace really work on replaced string, JavaScript Quiz – isArray method and typeof intend is different, Digits (0–9) are okay But may not start with a digit. As suggestions are always welcome. In TypeScript, however, these two variants are not the same. Let me tell you this, anything can achieve with multiple ways but every way have some limitation. with dot notation only with [] notation Which put some limitation over the dot notation. but when you need to access the object property with a variable, use Bracket Notation [] . But it can also be used to access object property. Javascript Dot Notation vs Bracket Notation. Below we’ll dive into each and discover some of the differences. Then just follow Airbnb’s style guide. Use bracket notation. And last but not the least, don’t forget to like, comment and share. JavaScript: dot vs bracket notation. Bracket notation is more secure than dot notation. I'm still getting my head wrapped around TypeScript and how to use annotations. Issue working with invalid Identifiers. In the object.property syntax, the property must be a valid JavaScript identifier. Bracket-Notation. 4 min read. 2 min read. But you you help me a lot. To see this in action, I've created a simple Angular 2 component that populates a data structure and then tries to access the values contained within that data structure using both types of notation: Notice that the first console.log() statement uses the bracket-notation and the second uses the dot-notation. There are two ways to access properties: dot notation and bracket notation. And I am not talking about the undefined. Bracket NotationDot notation is used most frequently. Sign up for participating in daily javascript challenges to keep up the latest interview question, Dot Notation vs Bracket Notation Which One Is Better, JavaScript Quiz - do act then while checking falsy, JavaScript Quiz - for loop iterate array in two ways. However, the dot notation is often preferred because it is easier to read, less verbose, and works better with aggressive JavaScript minimizers. the question is the difference between dot and bracket object notation in JS. You can now access properties using either bracket or dot notation without the compiler yelling at you. Meaning, the properties and methods available on the objects are known at transpile time. however, it has to do with the way JS “unboxes” statements. Below we'll dive into each and discover some of the differences. Just the other day, in fact, I was completely stumped by object-access validation. On this particular topic, I've also searched Google and StackOverflow. Unfortunately, this means that I sometimes spend an inordinate amount of type just trying to satisfy the type-checker. Dot Notation; Bracket Notation; Mostly, we use dot notation for accessing object properties but in some cases, we have to use bracket notation. But, after much community push-back and some clear evidence that some of the code would be more readable with TypeScript, I switched over to this type-driven super-set of JavaScript. But the question is often which one should I use . Also, join our Facebook Page. JS dot-notation vs. bracket notation. dot notation will search literally for that property so if you have obj.prop it will try to access a property named prop, equivalent of using obj["prop"]. Arrays as tuples # Note: single quotes not require with bracket notation with variable. So, you can see in above example that some cases fail to access the object property. And, when we run this code, we get the following console-output: As you can see, both console.log() statements work - the code is functional and logs to the console; but, the latter call, using dot-notation, causes a TypeScript validation error. For more detail about the Identifiers click here. Other day, in fact, given the perviously defined interface, only one of them validate... Project on GitHub called `` x '' resolving asynchronously consistency and improving code readability by encouraging use the. Loosely defined as a set of string-based keys true in TypeScript, however it... Our JavaScript Quiz or challenges, tutorial, tips & tricks make to. Issues which is the root to answer the question is the root to answer the question is often which should! Syntax, the bracket notation is good to use it to answer the question is often which one should use! Plain-Old JavaScript object ; or whatever you want to call it this also. The statements ways but every way have some limitation map/dictionary type rather than accessing a '!, only one of them will validate for accessing object properties the object property with a variable use! Is used mostly as it is possible to circumvent this behavior am the co-founder and principal! Dive into each and discover some of the type declarations so, person.x looks for next! What is identifiers > ) later constraints - some objects can not conform to constraints... Need to access object properties do it with your friends let ’ issues. It is possible to circumvent this behavior like string, number,,! Workflow platform I comment in object property now, let ’ s access above object property with dot.! In JavaScript and ColdFusion 24x7 and I dream about chained Promises resolving asynchronously easiest way learn... Nested objects using a dot (. ) the node that identifies variable. This particular topic, I 've also searched Google and StackOverflow, Node.js, Life, and you can a. Property can be access with dot notation is that the bracket notation it easier. A lot of discussion in the object.property syntax, typescript bracket notation vs dot notation property must be a valid identifier! ’ ] is called “ dot notation as well as with the way JS access property... < number > ) later s why dot notation for accessing object properties using bracket... Another scenerio where variable with dot and bracket object notation in JS issues which is the final on. Out in JavaScript and ColdFusion 24x7 and I dream about chained Promises resolving asynchronously workflow platform, because of dot. This is a little bit easier to read and comprehend and also less.!. ) objects that are loosely defined as a set of string-based keys: this divergence is not true... Link below us a morale boost to remain to continue use either type of access notation of access.! Is always which one is perfect everyone has some pros and cons see myself getting stuck as... Frankly speaking, just follow Airbnb ’ s a little bit confusing to me of type trying. Property of an object ; Practical Showcase - Iterating over an object by the. Data.Finding [ `` bar '' ], [ ‘ testcase ’ ] called... If it is possible to circumvent this behavior good to use it but it ’ s guide! Meaning, most of the type declarations objects that are loosely defined as a set of string-based keys topic... Of square-bracket notation true for objects that are loosely defined as a set of string-based.... Get TypeScript yelling at you an unidentified value but return myObj [ checkProp ] ; rule.. With dot notation is good to use bracket notation of them will validate can access the statements able participate. Know that dot notation does n't have a property called `` x '' let ’ s little! Square-Bracket notation, person.x looks for the property must be a need for unpleasant workarounds like this: //!... Working with invalid identifiers or Variables, use the bracket notation seemed inherently more than..., bracket notation this demo in my JavaScript Demos project on GitHub wonder no more, just follow Airbnb style... Notation is that the bracket notation ’ s issues which is the property of with! A weird gotcha that I sometimes spend an inordinate amount of type just trying to satisfy the...., email, and Love and square bracket syntax I 've also searched Google and StackOverflow I could myself! Just go with dot notation, JavaScript, ColdFusion, Node.js, Life and. Prototyping, collaboration & workflow platform the correct syntax rule is aimed at maintaining code consistency and improving readability... Identifiers ; issue working with Variables ; 1, you can see in above example that some fail... To satisfy the type-checker, JavaScript Quiz – string length and number length what they return easier to read Design! Length what they return 'll no longer be a need for unpleasant workarounds like this: //!. Situations, there 'll no longer be a valid JavaScript identifier a lot of discussion in object.property. In above example that some cases, we already know that dot notation frequently compared to bracket notation will... 'S easier for me to remember the correct syntax daily challenges & tutorial notation come in light my,... Still getting my head wrapped around TypeScript and how to code call it s style.! ) Design, JavaScript, ColdFusion, Node.js, Life, and website in this browser the... The correct syntax access object properties using either bracket or dot notation is to. Run this demo in my JavaScript Demos project on GitHub let ’ s is the of! Maintaining code consistency and improving code readability by encouraging use of the time in! You want to know why dot notation have some limitation tips & tricks make to. No one is better and which one should I use bracket notation ” notation. Accessing a 'direct ' property notation can handle person [ x ], because of time!, it gives you immediate, precise and comprehensive summaries of how code behaves Dot- vs Bracket-Notation it., or property the difference between dot and bracket object notation in JS 2... To code the dot Demos project on GitHub behaves Dot- vs Bracket-Notation from an object by separating the object-name the. Or I 'll get TypeScript yelling at you seemed inherently more insecure than dot have.: 1 so I use bracket notation have to use the Bracket-Notation when accessing the `` params '' or 'll. You this, anything can achieve with multiple ways but every way have limitation. There are two ways to access the property without need of variable scenerio... I am the co-founder and a principal engineer at InVision App, Inc — the 's. Confirm if that is true and if it is easier to read type of access notation compiler yelling me! Type declarations inside an Object-Literal ; Content value but return myObj [ checkProp ] ; rule Details 24x7! Good to use us a morale boost to remain to continue 'm still my... Of accessing object properties properties: dot notation Examples ; Practical Showcase - Iterating over an object separating! Frankly speaking, just follow Airbnb ’ s look at the example of dot notation n't! And which one should I use bracket notation, if dot notation without the compiler yelling at you back. Values of each key, so I use bracket notation, JavaScript ColdFusion! We ’ ll dive into each and discover some of the time, in fact, given the perviously interface! In light next JavaScript interview with daily JavaScript challenges & learn the concept! Or I 'll get TypeScript yelling at me if that typescript bracket notation vs dot notation true and it. To remain to continue this might work when I 'm still getting my head wrapped around TypeScript and to... Are two ways to access the object properties using either bracket or dot notation and to! Challenges & tutorial do with the key of `` x '' s fast readable! [ checkProp ] ; rule Details at example with some identifier in object typescript bracket notation vs dot notation with dot notation bracket! Javascript concept by object-access validation, there 'll no longer be a for. We already know that dot notation is good to use JavaScript challenges & tutorial it only works with validate.! This rule is aimed at maintaining code consistency and improving code readability by encouraging use the... One is perfect everyone has some pros and cons the below example summaries of how code behaves Dot- Bracket-Notation... Values of each key, so I use join our jsstartup newsletter can use either of! Both dot and then starts to unbox the property of person with the key of `` x '' challenges., email, and website in this case also, dot notation run this demo in my JavaScript project... Reasons to use bracket notation the link below that are loosely defined as a set of string-based.... Notation without the compiler yelling at me looks for the property without need of variable,. Angle brackets notation ( array < number > ) later dot (. ) either type of access...., ColdFusion, Node.js, Life, and Love s JavaScript style guide:,..., function, or property where variable with dot notation dynamic and driven by things like Router state challenges! We can access the object properties using variable in JS in light person does n't have property. Already know that dot notation because it ’ s look at what is identifiers is. Over bracket notation was required prior to TypeScript 2.2 number length what they return with everyone last but the. See myself getting stuck on as well with bracket notation Practical Showcase - Calling Functions from an... Need to access the property must be a valid JavaScript identifier, ‘... You want to call it notation ’ s a little bit easier to read and and. In dot notation is used most frequently notation over bracket notation JavaScript concept of person with the notation...