The afQuickField in Meteor is unable to locate the function when using the onfocus feature

I'm currently working on implementing a dynamic help feature that changes when the focus shifts using Meteor AutoForms. It's similar to the "Similar Questions" box that appears when you ask a question here. However, I'm encountering an issue where I receive a "ReferenceError: myFunc is not defined" when the field gains focus.

I've experimented with different ways of defining the myFunc function, such as as a non-wrapped function or a template helper in my .js file, or even as a <script> wrapped function in the .html file. I've also tried using an in-line function as part of the onfocus attribute, but that approach seems messy and it fails to find the title and text arrays in the .js file. The same problem occurs with onclick events. I also attempted to use a Template focus or click event, but it never fires.

Below is a snippet of the sample code. I've omitted all the <div> elements for clarity. The form displays correctly in the actual code; it's just the onfocus attribute that isn't functioning as expected.

.html

<template name="updateProfileForm">
    {{#autoForm id="updateProfileForm" collection="Meteor.users" doc=currentUser type="update"}}
    {{> afQuickField
        name="emails.1.address"
        id="secondaryEmail"
        label='Secondary Email'
        onfocus='ProfileUpdateHelp("secondary")'}}
</template>

.js

    Template.updateProfileForm.helpers ({
      ProfileUpdateHelp: function(fieldName) {
       // console.log("This:", this);
       //  console.log("instance():", instance());
        TemplateVar.set('helpTitle', profileUpdateHelpTitles[fieldName]);
        TemplateVar.set('helpText', profileUpdateHelpTexts[fieldName]);
      },
    });

profileUpdateHelpTitles = {
  primary: "Primary email address",
  secondary: "Secondary email address",
};
profileUpdateHelpTexts = {
  primary: "Primary email address help",
  secondary: "Secondary email address help",
};

I also tried using events, and none of them seem to fire (I would expect all 3 to fire):

Template.updateProfileForm.events({
    "click #secondaryEmail": function(e) {
        alert("Click");
    },
    "focus #secondaryEmail": function(e) {
        alert("focus");
    },
    "blur #secondaryEmail": function(e) {
        alert("blur");
    }, 
}); 

Answer №1

Great News!

After facing a challenge where events were not firing and helpers were not being executed in the .js file, I discovered that the root cause was related to my attempt to integrate support for prerender.io. The absence of the prerenderio object led to errors when references were made to it. Strangely, this issue seemed to affect the functionality of template helpers and events in a separate file, possibly due to the load order. However, once I removed the references to the undefined object, everything started working smoothly!


UPDATE:

I later realized that eliminating the undefined object wasn't the sole fix I implemented. I also mistakenly declared

import { Template } from 'Meteor/Meteor'

which was clearly not the correct import syntax. This caused Template to be recognized as something else, resulting in the disappearance of anything associated with Template (helpers, events, etc). The correct import statement should have been

import { Template } from 'meteor/templating';

If anyone has insights into the technical reasons behind the unexpected behavior of the incorrect import (lack of compile or run-time errors), please share them in the comments to enlighten us. Thank you.

END UPDATE


For those seeking a solution to implementing onfocus functionality, below is the code snippet. This code will trigger onfocus events for all input fields and buttons within the form. For a single input field, simply replace #formId with #fieldId.

Template.updateProfileForm.events({
  "focus #updateProfileForm": function(e) {
    const fieldId = e.target.id;
  },
});

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