![]() Print any JavaScript console.log() messages in the R console, to make it easier and quicker to debug apps without having to open the JS console. More information is available in the section “Calling your own JavaScript functions from R” below.įunctions that help you during Shiny app development FunctionĪdds a text input to your app that lets you run arbitrary R code live. Remove an event that was added to an HTML element with onclick() or onevent().Īdd or remove a CSS class from an element.Īllows you to write your own JavaScript functions and use shinyjs to call them as if they were regular R code. Similar to onclick, but can be used with many other events instead of click (for example, listen for a key press, mouse hover, etc). Was originally developed with the sole purpose of running a shinyjs function when an element is clicked, though any R code can be used. Run R code when a specific element is clicked. Reset a Shiny input widget back to its original value.Įxecute R code (including any shinyjs functions) after a specified amount of time. Initialize a Shiny tag as invisible (can be shown later with a call to show).Įnable or disable an input element, such as a button or a text input. Functionĭisplay or hide an element (optionally with an animation). In order to use any shinyjs function in a Shiny app, you must first call useShinyjs() anywhere in the app’s UI. Js_code <- HTML("shinyjs.Functions to improve user experience of your apps Tags$a(hreg = "#", onclick = "seque('test message')",ĭon't get me wrong shinyjs: has its merits, but the typical use case is that you want to trigger JavaScript code from the R side like in this example: library(shiny) Ui <- fluidPage(tags$head(tags$script(js)), Thus you can simply use plain JavaScript like in this toy example: library(shiny) ![]() The usage of shinyjs is an overkill in your case, because you do not want to call the JS function from R but anyways through the client. I will try to write a clear MRE code and provide it as an answer of this thread. On the other hand, a typical R actionButton element requires js$seque. In short, the js$seque call was incorrect at this point, I had to replace this line with que, namely with the actual name of the function in JS. LengthMenu=c(10, 25, 50, 100)), rownames = FALSE)Īfter many hours of debbugging I managed to solve the issue by replacing the onclick='js$seque(",val,")' event of the button in the createLink function with the following: onclick='que(\"",val,"\")' - or alternatively even clearer onclick='que(JSON.stringify(val))' }, escape = FALSE, options = list(scrollX = TRUE, dom = 'lfrtip', pageLength = 10, From the link of the last column, I would like to dynamically change the value of the var seq=new Sequence('') with the sequences of the Datatable and draw the result in the sequence-viewer div every time a link is clicked. ![]() Using the following code, I construct and render a sample Datatable with sequences. Additionally, using the tags$div(id="sequence-viewer") I am able to see the corresponding tag in the source of the web page, so up to this point I think everything is fine. I have downloaded and would like to incorporate in my R Shiny app the following JavaScript library: GitHub linkĪs you can see in the snippet below, I have incorporated the file in the head of the UI.
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