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Stuff I wish I'd known sooner about service workers

I recently had several days of extremely frustrating experiences with service workers. Here are a few things I've since learned which would have made my life much easier but which isn't particularly obvious from most of the blog posts and videos I've seen.

I'll add to this list over time – suggested additions welcome in the comments or via twitter.com/rich_harris.

Use Canary for development instead of Chrome stable

Chrome 51 has some pretty wild behaviour related to console.log in service workers. Canary doesn't, and it has a load of really good service worker related stuff in devtools.

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# overwrite master with contents of feature branch (feature > master)
git checkout feature      # source name
git merge -s ours master  # target name
git checkout master       # target name
git merge feature         # source name

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Windows Registry Editor Version 5.00

; Windows terminal

[-HKEY_CLASSES_ROOT\Directory\shell\MenuWindowsTerminal]


[-HKEY_CLASSES_ROOT\Directory\background\shell\MenuWindowsTerminal]

[-HKEY_CLASSES_ROOT\Directory\LibraryFolder\shell\MenuWindowsTerminal]

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<?php

add_shortcode( 'user_company_link', 'yanco_user_company_link' );
function yanco_user_company_link() {

    if( ! is_user_logged_in() ) {
        return;
    }

    $html = '';

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[Unknown column 'client_ip' in 'field list']
REPLACE INTO `wp_wsal_occurrences` (`site_id`, `alert_id`, `created_on`, `client_ip`, `severity`, `object`, `event_type`, `user_agent`, `user_roles`, `username`, `user_id`, `session_id`, `post_status`, `post_type`, `post_id`) VALUES (1, 2101, '1648760092.973838', '', '', '', '', '', '', NULL, NULL, '', '', '', 0)

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PHP message: WordPress database error Unknown column 'is_read' in 'field list' for query UPDATE `wp_wc_admin_notes` SET `name` = 'wc-admin-optimizing-the-checkout-flow', `type` = 'info', `locale` = 'en_US', `title` = 'Optimizing the checkout flow', `content` = 'It’s crucial to get your store’s checkout as smooth as possible to avoid losing sales. Let’s take a look at how you can optimize the checkout experience for your shoppers.', `content_data` = '{}', `status` = 'pending', `source` = 'woocommerce.com', `date_created` = '2021-02-03 19:00:04', `date_reminder` = NULL, `is_snoozable` = '0', `layout` = 'plain', `image` = '', `is_deleted` = '', `is_read` = '' WHERE `note_id` = '41' made by require('wp-blog-header.php'), require_once('wp-load.php'), require_once('[...]/wp-config.php'), require_once('wp-settings.php'), do_action('init'), WP_Hook->do_action, WP_Hook->apply_filters, Automattic\WooCommerce\Admin\Install::check_version, do_actio...PH