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msd2/wordpress/wp-admin/js/language-chooser.js

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+/**
+ * @output wp-admin/js/language-chooser.js
+ */
+
+jQuery( function($) {
+/*
+ * Set the correct translation to the continue button and show a spinner
+ * when downloading a language.
+ */
+var select = $( '#language' ),
+	submit = $( '#language-continue' );
+
+if ( ! $( 'body' ).hasClass( 'language-chooser' ) ) {
+	return;
+}
+
+select.focus().on( 'change', function() {
+	/*
+	 * When a language is selected, set matching translation to continue button
+	 * and attach the language attribute.
+	 */
+	var option = select.children( 'option:selected' );
+	submit.attr({
+		value: option.data( 'continue' ),
+		lang: option.attr( 'lang' )
+	});
+});
+
+$( 'form' ).submit( function() {
+	// Show spinner for languages that need to be downloaded.
+	if ( ! select.children( 'option:selected' ).data( 'installed' ) ) {
+		$( this ).find( '.step .spinner' ).css( 'visibility', 'visible' );
+	}
+});
+
+});