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Avoid using jquery if disabled using flag #16687

Merged
merged 2 commits into from
May 27, 2018
Merged

Avoid using jquery if disabled using flag #16687

merged 2 commits into from
May 27, 2018

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cibernox
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rwjblue
rwjblue requested changes May 25, 2018
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Also needs to add the flag to packages/ember-environment/lib/env.ts (like this one)...

@cibernox cibernox force-pushed the dont-use-jquery-if-disabled-using-flag branch from 60b6a16 to 03a33dd Compare May 25, 2018 14:08
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@rwjblue Done!

This was referenced May 25, 2018
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simonihmig
simonihmig reviewed May 26, 2018
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packages/ember-views/lib/system/jquery.js

if (hasDOM) {
jQuery = context.imports.jQuery;

if (jQuery) {
if (!jQueryDisabled && jQuery) {
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Not sure how this is all connected, but I see a few modules importing jQuery from this module, without checking for jQueryDisabled. Before this change, there was no case possible that jQuery was available while jQueryDisabled is true. This is now possible, with the flag being false but the jQuery global still available. So should we override jQuery to undefined, if jQueryDisabled is true?

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@simonihmig I think you might be right. Not if the user has explicitly disabled jQuery, Ember.$ will be undefined, even if jQuery happens to be included in the page in some other way.

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Ya, I agree. I think that we need to change all of our guards to be checking jQueryDisabled instead of the default export of this module.

tldr; it should absolutely be possible to tell Ember to treat jQuery as disabled even if window.$ is present...

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@rwjblue I already did in this PR

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Doh! sorry :( I guess I thought we had more places that did the conditional...

rwjblue
rwjblue reviewed May 26, 2018
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packages/ember-views/lib/system/event_dispatcher.js Outdated
import ActionManager from './action_manager';
import fallbackViewRegistry from '../compat/fallback-view-registry';

const HAS_JQUERY = jQuery !== undefined;
const HAS_JQUERY = jQueryDisabled === false;
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I don't think we should check for false here (though I suppose it doesn't matter too much). In general we can trust that our jQueryDisabled export will always be boolean and will encapsulate the proper "default to true, unless false" logic.

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Hmm, any reason to not just use jQueryDisabled in this file instead of making the second constant (HAS_JQUERY)?

rwjblue
rwjblue requested changes May 26, 2018
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Can you also update:

ember.js/packages/@ember/application/tests/application_test.js

Line 372 in d97dcf7

if (jQuery) {

ember.js/packages/ember/index.js

Line 564 in d97dcf7

Ember.$ = views.jQuery;

(only setup Ember.$ if the jQuery is enabled)

@cibernox cibernox force-pushed the dont-use-jquery-if-disabled-using-flag branch from 49441f7 to de4d6fd Compare May 26, 2018 19:49
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rwjblue commented May 26, 2018

Darn, sorry. My last change suggestion made the reexport tests fail

ember.js/packages/ember/tests/reexports_test.js

Line 171 in 4aed456

['$', 'ember-views', 'jQuery'],

Should become:

JQueryDisabled && ['$', 'ember-views', 'jQuery']

Then add a .filter(Boolean) to the end of that array. This will make it only check for Ember.$ export when it should be there.

Sorry for the run around...

@cibernox cibernox force-pushed the dont-use-jquery-if-disabled-using-flag branch from de4d6fd to bae56f9 Compare May 26, 2018 21:08
rwjblue
rwjblue approved these changes May 26, 2018
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Looks great to me, thank you!!

@cibernox cibernox force-pushed the dont-use-jquery-if-disabled-using-flag branch from bae56f9 to 4aa5c84 Compare May 26, 2018 21:15
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I had to rebase because conflicts with the deprecation of originalEvent, but it should be green now.

rwjblue
rwjblue reviewed May 26, 2018
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Looks like a logging test is failing? kk

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@simonihmig After rebasing over your deprecating a test is failing, but I think I've resolved conflicts correctly. Can you take a look to see if it's evident to your what is going on?

simonihmig
simonihmig reviewed May 26, 2018
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packages/@ember/application/tests/application_test.js Outdated
if (jQuery) {
assert.equal(messages[2], 'jQuery : ' + jQuery().jquery);
if (jQueryDisabled) {
assert.equal(messages[2], 'my-lib : ' + '2.0.0a');
assert.equal(messages[3], 'my-lib : ' + '2.0.0a');
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@cibernox this is related to the failing test, and it seems this line has to go into the else-block (which is when jQuery is enabled)! (as you have switched the order of the jQuery/no-jQuery blocks)

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Good catch, but it wasn't related with the failing test apparently.

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I think it did, as the previous failed test was related to the env output, and that seems to be passing now. But a deprecation test is now failing: https://travis-ci.org/emberjs/ember.js/jobs/384219437#L1562 🤔

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That was the only failure I was seeing before. That was the one I don't see why it is failing because of my changes

@cibernox cibernox force-pushed the dont-use-jquery-if-disabled-using-flag branch from 4aa5c84 to 0e00d48 Compare May 26, 2018 22:43
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@cibernox Not sure what's going on. I would guess it's something about the changes around jQueryDisabled, that the tests expect the deprecation but it's not triggered. I am looking at ENV directly here, so I could change that in some test. Don't if it's related. I would have to run the tests in the browser through the debugger, to really understand what's happening there. But not able to do so today, but I can have a look on Monday, if you don't beat me to it...

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rwjblue commented May 27, 2018

I just pushed a commit that should fix the remaining issue which was basically that we didn't properly identify the difference between jQuery being explicitly enabled (which should not receive a deprecation) and when it was implicitly enabled (which should receive a deprecation).

@rwjblue rwjblue merged commit fd44f81 into emberjs:master May 27, 2018
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@rwjblue thanks a lot! 👍

@cibernox cibernox deleted the dont-use-jquery-if-disabled-using-flag branch May 27, 2018 21:53
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@cibernox @rwjblue @simonihmig @locks