Issues with dynamically generating buttons using Ajax and Javascript technology

In order to dynamically create buttons based on the contents of a text file during the onload event, I have written a JavaScript function. However, despite being able to read the file and using alert messages to verify the correctness of the variable 'button', the buttons are not being created at all.

function createButtons(){
    $(document).ready(function() {
        alert("1");
      $.ajax({
        url : 'http://localhost:8080/SSAD/type.txt',
        dataType : "text",
        success : function (filecontent) {
          var lines=filecontent.split('\n');
          $.each(lines, function() {
            if (this!='') {
              var button='<button type="button" class="btn btn-block btn-inverse active" data-toggle="button tooltip" title="Click this to enable/disable viewing of'+this+'" onclick="toggleVisibility('+"'"+this+"'"+')">'+this+'</button>';
              $("#crisisButtons").append(button);
            }
          });
        }
      });
    });
}

HTML:

<div class="crisisButtons"></div>

<script type="text/javascript">window.onload = createButtons();</script>

Answer №1

Instead of immediately assigning the function createButtons to window.onload, you should simply assign it without calling it.

window.onload = createButtons;

It's recommended to use addEventListener instead of directly assigning functions to window.onload.

Also, make sure to only use one event handler - either DOMReady or onload, not both.

Update your code as follows:

$(function() {
    alert("1");
  $.ajax({
    url : 'http://localhost:8080/SSAD/type.txt',
    dataType : "text",
    success : function (filecontent) {
      var lines=filecontent.split('\n');
      $.each(lines, function() {
        if (this!='') {
          var button='<button type="button" class="btn btn-block btn-inverse active" data-toggle="button tooltip" title="Click this to enable/disable viewing of'+this+'" onclick="toggleVisibility('+"'"+this+"'"+')">'+this+'</button>';
          $(".crisisButtons").append(button);
        }
      });
    }
  });
});

Don't forget to update the selector from ID to class in your HTML structure for the buttons to show up correctly.

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