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Why WordPress 5.5 is Breaking Sites

13 min read

WP 5.5 deprecated help for jQuery Migrate could have induced at the least 50,000 damaged websites. A difficulty with how themes deal with pagination is inflicting different websites to interrupt after updating to five.5.

That’s a variety of publishers who have been affected by this difficulty and there are probably going to be extra who’re looking for this answer.

Thankfully there are answers.

Preserve studying to see how the individual within the graphic beneath solved his drawback.

A writer reported a bug in WordPress 5.5

jQuery Migrate and WordPress 5.5

1000’s of WordPress publishers are experiencing issues as a result of WordPress 5.5 shipped and not using a JavaScript library known as jQuery Migrate.


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jQuery Migrate is a library that acts like a bridge for older code to perform on WordPress.

Nevertheless when publishers keep on with an older theme, significantly one that’s now not being up to date, compatibility points ultimately creep in and that’s what occurred with WordPress 5.5.

What Type of Errors Are Websites Experiencing?

JavaScript will be considered like little machines that make issues occur.

The scripts work behind the scenes to make types, search bars, and drop down menus work.

What’s Inflicting JavaScript Errors in WordPress 5.5?

The reason for a few of the points are older plugins. For others, the reason for the issue are older WordPress themes.

The writer within the screenshot above reported a crucial bug to WordPress that prevented them from publishing articles and featured pictures:

The writer reported:

“Your final replace is a pure catastrophe. I used the traditional editor plugin as a result of your block editor is a full mess, and now it doesn’t work anymore since your replace. I can solely edit in HTML mode and never in visible!

So I attempted to publish my final article in your block editor, however inconceivable so as to add a featured picture, I’ve a white web page with “Featured picture” title exhibiting on the highest and that’s all.”


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The supply of the issue was an older plugin that relied on jQuery Migrate Library to perform. The plugin stopped working after WordPress eliminated that library.

The issue wasn’t actually the fault of WordPress. The issue was brought on by an older and outdated plugin.

The Stack Overflow discussion board can also be experiencing questions associated to WordPress 5.5. and websites dropping performance.

This individual requested for assist concerning an issue that was brought on by an outdated theme that’s experiencing lack of dropdown menu and slider performance.

Screenshot of a page from the Stack Overflow developer forum.Screenshot of a query on stack overflow about an older theme not working after updating to WordPress 5.5.

What induced the issue was older JavaScript in an outdated WordPress theme.

The answer to this drawback is straightforward:

Learn how to Repair the WordPress 5.5 jQuery Downside

Learn how to Repair jQuery Migrate Bug

If the difficulty is expounded to a plugin that’s utilizing older JavaScript information, try when was the final time that plugin was up to date. If the final time it was up to date was a 12 months or longer, you may wish to take into account in search of one other plugin that’s extra updated.

Older plugins which can be deserted can grow to be a safety threat. Higher to replace to a brand new and effectively maintained plugin than proceed utilizing a plugin that may have safety points.

WordPress has launched a plugin that restores the jQuery Migrate JavaScript library and restores the complete perform of an internet site.

In the event you’re experiencing an absence of performance and your Chrome developer console is exhibiting JavaScript errors, plus your theme or a plugin is older, then putting in this plugin could aid you.

The WordPress Allow jQuery Migrate Plugin has been downloaded over 50,000 occasions within the days because it’s been launched.

Screenshot of WordPress Enable jQuery migrate plugin page

The title of the plugin known as, Allow jQuery Migrate Helper.


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You’ll be able to obtain the Allow jQuery Migrate Helper plugin right here:

Enable jQuery Migrate Helper

WordPress 5.5 Pagination Bug

Updating to WordPress is inflicting pagination to fail on some websites.

Pagination is a reference to the navigational web page numbers on the backside of a multi-page doc, often in a class part of an internet site.

Pagination is a part of the navigational construction of an internet site. It permits website guests to seek out net pages deep in a website.

An official bug report was filed about this difficulty at WordPress

Based on a writer:

“After upgrading to five.5 the web page parameter is being dropped from the URL with 301 redirect… This was breaking our website…. I wish to set up 5.5 however that is breaking the location.”

Others reported that that is affecting a lot of their purchasers

“That is fairly main because of the truth that many themes/plugins are utilizing this question param. Shoppers are going nuts as we converse.”

What is occurring is that there’s a battle in the usage of the phrase “web page.” WordPress makes use of it for pagination however solely with a numerical worth.


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Themes are utilizing the phrase “web page” with further non-numerical values.

Based on WordPress Core Contributor  Sergey Biryukov (@SergeyBiryukov):

“It ought to solely have a numeric worth, and isn’t meant for use for some other function, e.g. ?web page=provides&id=xxx.

So I’d suggest altering this variable in any customized code to another title to keep away from conflicts.

As one other attainable answer, you’ll be able to disable the redirect_canonical() perform for these requests, that’s hooked up to the template_redirect motion by default.”

A writer posted a workaround:

“Have downgraded for now which works and can rebuild the theme utilizing ‘mypage=’ as an alternative of ‘web page=’ within the question string.”

WordPress 5.5 Largely a Success

For probably the most half, WordPress 5.5 is a hit. I spent a number of hours reviewing the record of attainable bugs and was impressed by the work the WordPress group was doing to analysis every drawback to determine all of them out.

The WordPress group is doing a tremendous job.


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There are some points associated to WordPress 5.5 which have presumably affected hundreds of publishers. However these issues are pretty straightforward to repair as soon as the trigger is recognized.

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