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Trying to hide/show myData


Using a button to hide/show myData in <label id="myData">

I've gotten lost.

3 Answers

Instead of

if ( onclick.addEventListener == true ){
    document.getElementById("myData").style.display = "none";


document.getElementById("onclick").addEventListener("click", () => {
  const dataLabel = document.getElementById("myData");
  if (dataLabel.style.display == "none") {
    dataLabel.style.display = "block";
    dataLabel.style.minWidth = "1em";
    dataLabel.style.minHeight = "1em";
  } else {
    dataLabel.style.display = "none";

The label with the id "myData" is currently empty, so changing the display property does not show or hide any text. Giving the label a minimum width and height allows the label's background color to be visible when the label is displayed.

Thank you for your answer to my problem, I will keep the code safe for future projects.... Now though I'm having a little difficulty populating the label "myData" with my JavaScript data.

This is the more recent program https://w.trhou.se/bat909qpqs I feel like I should know this but am unable to make the connection.. I will work on it for a bit to see if I can get it to work.

I'm thinking that :-
document.write("firstName: " + typeof firstName + "<br>");
document.write("valueOfPi: " + typeof valueOfPi + "<br>");
document.write("isValid: " + typeof isValid + "<br>");
document.write("jsObject: " + typeof jsObject + "<br>");
document.write("jsMethod: " + typeof jsMethod + "<br>");
document.write("jsSymbol: " + typeof jsSymbol + "<br>");
document.write("emptyVariable: " + typeof emptyVariable + "<br>");
document.write("unusedVariable: " + unusedVariable + "<br>");

should all be in a function and these are placed somehow into the label when the button is clicked, its a bit beyond me. BTW I'm just creating my own projects to learn how javascript works, as instructed by the teachers, I must admit this is as far as my thinking goes.

Instead of using document.write, have you considered using document.getElementById("myData").textContent = "firstName: " + typeof firstName + "<br> ... unusedVariable: " + unusedVariable + "<br>"; when the button is clicked?

Thanks again - sorry to pick your brains so much but youve really helped me alot..