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We want to hide the create issue button until at least one attachment is added.

Solution

We will use lfExecuteJS in order to watch the attachments module from the create screen and, according to its files, to hide or show the create issue button.

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Code Block
titlelf.js
var attachments = AJS.$(".file-input-list ");
console.log("Got attachments");
AJS.$(function() {
  var $div = attachments;
  var html = $div.html();
  var checking = setInterval(function() {
    var newhtml = $div.html();
    if (html != newhtml) {
      myCallback();
      html = newhtml;
    }
  },100);
  function myCallback() {
    console.log("Content changed");
    var size = AJS.$("[duitype='dndattachment/progressbars/ProjectUploadProgressBar']").size();
    if (size == 0) {
        console.log("You can't create such an issue");
         AJS.$("#create-issue-submit").hide();
         AJS.$("#issue-create-submit").hide();
    } else {
        console.log("You can now create the issue");
        AJS.$("#create-issue-submit").show();
        AJS.$("#issue-create-submit").show();
    }
  }
});

See also