Loading EventLogging modules conditionally.

EventLoggingConditionalLoad.php

<?php
// MyExtension.php

$wgHooks[ 'ResourceLoaderRegisterModules' ][] = function ( ResourceLoader &$resourceLoader ) {

	/** @var array: list of modules that ext.myExtension.core depends on. **/
	$moduleDependencies = array( /* ... */ );

	// If EventLogging is present, declare the schema module
	// and add it to the array of dependencies.
	if ( class_exists( 'ResourceLoaderSchemaModule' ) ) ) {
		$resourceLoader->register( "schema.MyExtension", array(
			'class'    => 'ResourceLoaderSchemaModule',
			'schema'   => 'MyExtension',
			'revision' => 4948295
		);

		$moduleDependencies[] = "schema.MyExtension";
	}

	$resourceLoader->register( "ext.myExtension.core", array(
		'scripts'       => 'modules/ext.myExtension.js',
		'dependencies'  => $moduleDependencies,
		'localBasePath' => __DIR__,
		'remoteExtPath' => 'MyExtension'
	) );
	return true;
};

ext.myExtension.js

var logEvent = mw.eventLog ? mw.eventLog.logEvent : function () {};

You are missing [] form line 4. On line 11 there is extra ), On line 26 missing ) and after that missing "return true".

Eep. Fixed.

I think there still is an extra ) on L11. There needs to be , at the end of L15/25 and another ) on L16.

This should be updated to use the EventLoggingRegisterSchemas hook and maybe moved to a wiki somewhere?