The only two attributes we need to concern ourselves with in our first transaction is are “to” and “value” which are the recipient address and the amount of ether we wish to send (this is calculated in its base unit ‘wei’). This code will give you some insight into React. Script Lab allows you to create code that includes JavaScript, HTML and CSS so you can start to cross over to becoming an Office/web developer - that's the way things are going. You can register by clicking on the ’Sign Up’ button on RapidAPI menu. Great, but let’s see what happens if we try to retrieve the deleted object using the GET request: We received the answer that this object no longer exists. JavaScript is the programming language of the Web. As a result, we will see the following in the console: Everything works as expected. Copy and paste the below into your html document: This allows us to create a contract with one click from the browser window. The increasing focus on the API also raises arguments about the most important programming language to learn. The function for compiling from solidity is web3.eth.solidity() and when passed solidity code produces EVM bytecode. How create and display HTML elements with JavaScript. In the case of working with RapidAPI, immediately after registering with the service, we can go to the section of the API of our interest, subscribe to it and test endpoints directly on the API page. Now we have a description of our contracts function and the arguments it takes we can create a ‘contract’ object using web3.eth.contract() a function which takes two arguments, the first is the address of the contract as a 160bit hex string, the second is the contract description: Lets go back and amend our ‘createSolidityContract()’ function to also create this object: Here we have made a couple of important changes, firstly we have declared a new variable ‘address’ which is the value returned by the transact function which creates our contract. JSON is an open standard data format that is lightweight and human-readable, and looks like Objects do in JavaScript; hence the name. Copy and paste the above into your html template. Make a GET request with id again to show that the DELETE method worked and the object is definitely not there. JSON is a format that returns data from server to browser. We will try to keep things simple, so to work with queries we will use the axios library because of its simplicity and universality. How create and display HTML elements with JavaScript. You will also need the qs library to encode requests. This JavaScript API can be used to understand the visibility and position of DOM elements (known as 'targets') relative to a containing element (the 'root'). Basic knowledge of HTML and CSS would also be useful. This tutorial will teach you JavaScript from basic to advanced. To do this, we modify our object as follows: Now John is 20, his average score is 4.0, and the student object now looks like this: We need to inform the server about this information and for this task we use the following code snippet: That is, we execute a PUT request, where the first parameter is the URL pointer to the desired object, the second parameter is the already updated student, and the third is the necessary headers. It will look like this: Let's get started. The modern web development world is impossible to imagine without JavaScript. Commonly, the name (address) of the endpoint corresponds to the functionality it provides. API (Application Programming Interface) can be considered as a set of rules that are shared by a particular service. You should see the changes to the storage registering inside it. Firstly, we are going to model the contracts functions by defining an array of JSON objects corresponding to the functions our contract has. Here are some of the most popular APIs on RapidAPI: Filed Under: JavaScript API Tutorials, REST API Tutorials Tagged With: api tutorial, how to, how to use an api, javascript. For each of these actions, JAAS API provides a corresponding endpoint. Check out our medium team page here. Keep reading if you would like to get a summary of the video in text. Discover, evaluate, and integrate with any API. To use Office JavaScript APIs within any of your add-in's web pages, you must reference the CDN in a