![]() Once this is done, we can create our waveform in our componentDidMount method, which initialises the waveform using the Wavesurfer.create() method and appends it to our React class as this.waveform. WAVESURFER PLAY BUTTON HOW TOYou can find instructions on how to import it on their website I am using yarn to add my packages to my app with yarn add wavesurfer.js. Now it is time to import Wavesurfer.js and initialise it in out components. Along with the WaveContainer, the Wave component is a styled component thats is composed of a. You may be wondering why we have imported the Wave component this is the element we will append Wavesurfer.js to and as you will see later, is the reason why we have ids added to bother Wave component and audio element. I’ve gone for the very basic Waveform, but you can call it whatever you wish: In this example, I am using Class-based composition, as the Wavesurfer.js library works best when being bound to a JavaScript class and we have access to the this keyword - if you want to find out more about this you can read one of these two great articles here and here. They work in a very similar way to CSS, so you should be able to translate the minimal styling I use into CSS very easily. If you are unfamiliar with these, you can find out more here. I’m assuming you have a pretty good understanding of React, and for this example I will be using Styled Components. Well, look no further! Below I will outline how you can get this Wavesurfer.js up and running in your React app in a few short steps, as well as some help understanding some key elements of the API. You will then likely discover that the very useful react-wavesurfer module that uses the main library is no longer maintained on Github and then begin wondering where to turn next. However, after a bit of time exploring their website, you will struggle to find any decent examples with React and likely turn to Google to search for “ React wavesurfer.js” like I did. json_array1.One of the solutions is to use a package called Wavesurfer.js a library built using the Web Audio API and HTML5 Canvas to bring you super customisable audio visualisation. ![]() Notice that we might want to sort it by the Key-Value pair Name. WAVESURFER PLAY BUTTON CODENow to sort them we use the below code to sort them. Lets say we have following json arrays and we want to sort them to compare them. To do this we might want to sort the array first and then compare as the order of key value pairs might be different. We might want to compare it with similar JSON array to find out whether both are same or not. Let us assume we have a JSON array of objects that contain some key value pairs. So the above line of code is selecting a particular td element with the id which is now being escaped to handle special characters. Var element = $('tr[id^=' + escapeSelector(id) + ').attr("data-filename") Now just call the above function whenver you are using jQuery selector to select that element. Notice that the function accepts a parameter id which will escape the special characters using regex and then return it. So this article will help you manage such special characters so that the Javascript on that page does not break and throw any error for smooth accessing of the web page.įirst create a function like below and place it in a common place where you will access it. When we make dynamic id in Javascript sometimes it may happen that it can contain special characters like something which might be difficult to access the element back using the jQuery selector. ![]()
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