How to get key and value from json object in reactjs

Note: I am not an experienced React developer, it is my project to teach myself React and to blog as I do, so that I learn exactly what is happening and why see this post for why. See additional reading notes at the end of the article is you feel you need more information on these topics. We can then pass this state down to our child component using props. See notes at the end for more information.

how to get key and value from json object in reactjs

If we take a look at the React panel in Chrome DevToolswe can see that our data is now being passed down to our child component as Props. When we look at what is being passed down though, it becomes clear pretty quickly that in order to display this data in a tabular way, we are going to have to loop through and output each array item as a table row.

At this point you would be forgiven for thinking that you could loop through the data and output each row using either a for or foreach loop. But before we can do that we first have to assign keys to the data so that we could access it within our loop. To start with I thought this would be a simple case of using the.

This is because, although Chrome Dev Tools lists the data in Props as an array, at the moment it is still an object containing JSON data this took me quite a while to realise and therefore the map function will not work yet. What this does is, return an array of data where the elements keys are all strings that match the data within the JSON object. For example:. Looking at the data in githubDatathe Object. So now we have access to the data, all that is left is to loop through it so that we can create a table of github issues.

And to do that we would combine Object. It looks like there is a lot going on here but if we break it down, we are first taking the Props githubData and creating keys that are strings matching the data within.

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Display JSON Data in React JS

In App. In ChildComponent. Our data, original saved as state, now passed as Props If we take a look at the React panel in Chrome DevToolswe can see that our data is now being passed down to our child component as Props.

So far so good… When we look at what is being passed down though, it becomes clear pretty quickly that in order to display this data in a tabular way, we are going to have to loop through and output each array item as a table row. I kept hitting this error: TypeError: githubData.

how to get key and value from json object in reactjs

Enter Object. Share this: Twitter Facebook. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:.

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Email required Address never made public.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am new to react and trying to implement all the key and values of a JSON object in my web page. I have a below JSON structure.

I want all the keys and values to be printed in my web page where key should be printed as labels. I am able to print the keys and values but not the nested object under key4 p1,p2,p3.

ReactJS - Keys

I want all the keys along with its values to be printed one after another in my web page. Can someone tell me where am i going wrong and how to access all the keys as labels and values of the JSON object.

S I am using getValues with map function to retrieve first level of key and values as the provided syntax by you under generateElement gives me error. Though, there is something missing in your design, you are not defining the exact condition for when should the program actually extract the value.

For example, lets define that if a value of a given key is a string, then we will render it to the page.

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Then with this decision, you can write a function that will take a data object and recursively will go over the object's keys, based on the condition above, it will return the value Or another call to the same function with the value as the new data object. I'm using. Note, that the recursive call will return an array, so i'm using the spread syntax to extract it's members.

JavaScript iterate through object keys and values

Now, we want our key and value to get rendered to the DOM. So instead to just push the key or valuewe can push an element. Learn more. Asked 2 years, 3 months ago. Active 2 years, 3 months ago. Viewed 18k times. You want recursion. Active Oldest Votes. What you need here is recursion. Sagiv b.March 28, Hi, I had faced one issue like this. See the below example. Labels Javascript. Labels: Javascript. PcGeek said…. I want to get it from mongodb console to find the field name of the second record.

May 2, at PM. Unknown said…. March 3, at PM. Gnanasuriyan said….

Object.keys, values, entries

Krishnamachari Shrikanth : For your input, we need to have recursive function. It doesn't look like a javascript Object at all. April 4, at AM. Please help me on this. So I have to get the value dynamically. October 27, at PM. Thank you!!! So simple, so elegant. You saved lot of my time. November 13, at PM. December 19, at AM. Hi I have lot of json object in fouser table. For particular object say id is ObjectId "a91beb" taking means no problem working.

So working. How can i resolve please help me. I'm using this inside jaspersoft. February 12, at PM. AWS Training in Chennai. April 12, at AM. Sai Elakiyaa said…. You did well on inspiring writers like me.Help to translate the content of this tutorial to your language!

In the previous chapter we saw methods map. These methods are generic, there is a common agreement to use them for data structures.

If we ever create a data structure of our own, we should implement them too. The first difference is that we have to call Object. Why so? The main reason is flexibility. Remember, objects are a base of all complex structures in JavaScript. So we may have an object of our own like data that implements its own data. And we still can call Object. The second difference is that Object. Just like a for.

Also, there exist a method Reflect. Objects lack many methods that exist for arrays, e. It may look difficult from the first sight, but becomes easy to understand after you use it once or twice. We can make powerful chains of transforms this way. Write the function sumSalaries salaries that returns the sum of all salaries using Object. Open a sandbox with tests. Or, optionally, we could also get the sum using Object.

Open the solution in a sandbox. We want to make this open-source project available for people all around the world. Tutorial map. They are supported for: Map Set Array Plain objects also support similar methods, but the syntax is a bit different. Please note the distinctions compared to map for example : Map Object Call syntax map.

Tasks Sum the properties. There is a salaries object with arbitrary number of salaries. If salaries is empty, then the result must be 0. Count properties. Previous lesson Next lesson.I just wanted to keep this for reference how to quickly loop through an objects keys and values, if needed.

how to get key and value from json object in reactjs

I also included an implementation using jQuery. Note the limitations of using a for This approach of looping through keys and values in an object can be used to perform more useful operations on the object, for instance the method could call a function passed in on each of the values. An example of this is in the foIn method in mout.

I was just putting this in as a reference as to how to iterate through all keys and values in an object. I will rename the pro tip to that.

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It could be useful to use this approach to create an array of all the keys in an object and pass that back, or we could pass in a function to a method like this which iterates through the keys and values, and calls the function for specific values.

See MDN for details. December 18, Last Updated: December 18, JavaScript iterate through object keys and values jquery javascript. Written by Steven Iseki.

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June 04, June 05, October 27, And for compatibility with all browsers before using Object. February 28, I find this useful for me: ObjectKit. Sponsored by.

Awesome Job. See All Jobs.The Object. The ordering of the properties is the same as that given by looping over the properties of the object manually. If you want all properties—including non-enumerables—see Object.

In ES5, if the argument to this method is not an object a primitivethen it will cause a TypeError. To add compatible Object.

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Please note that the above code includes non-enumerable keys in IE7 and maybe IE8when passing in an object from a different window. For a simple Browser Polyfill, see Javascript - Object. Get the latest and greatest from MDN delivered straight to your inbox. Sign in to enjoy the benefits of an MDN account. The source for this interactive example is stored in a GitHub repository.

The compatibility table on this page is generated from structured data. Last modified: Jan 24,by MDN contributors. Related Topics. Standard built-in objects Object Properties Object.

Learn the best of web development Get the latest and greatest from MDN delivered straight to your inbox. The newsletter is offered in English only at the moment. Sign up now. Sign in with Github Sign in with Google. Chrome Full support 5. Edge Full support Firefox Full support 4. IE Full support 9. Opera Full support Safari Full support 5. WebView Android Full support 1. Chrome Android Full support Firefox Android Full support 4. Opera Android Full support JavaScript seems to be disabled in your browser.

You must have JavaScript enabled in your browser to utilize the functionality of this website. In this example project we parsed JSON data in three different components. The data. The Example1 component display the SocialMedias array data, the second component Example2 displays the Experiences array data and finally the third component Example3 displays the Skills data.

This examples helps to understand how to fetch the JSON file directly in component and parse only a specific section data. React differs from other libraries because it adopts a whole new language called JSX to illustrate what the visuals will look like. What is JSX? JSX is a shorthand for calling React. JSX accepts any valid JavaScript expression inside curly braces.

A React element is a JavaScript object with specific properties and methods that React assigns and uses internally. React elements are the instructions for how the browser DOM get created. Different programming languages, tools, and frameworks have several ways to jump-start development for their particular tool-set. When you set up a new project, you will start with a basic set of application files, some placeholder content, and a complete set of development tools.

React components are the fundamental unit of a client-side application written in React. React components are useful because they provide access to the React support for creating features by combining JavaScript, HTML, and other components. We can define components using JavaScript functions or classes that receive properties as inputs and maintain their internal state. We can create two primary types of components Stateless and Stateful. Solutions You Must Read.

how to get key and value from json object in reactjs

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