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/*! * JavaScript for Special:Preferences: Enable save button and prevent the window being accidentally * closed when any form field is changed. */ ( function () { $( function () { // Check if all of the form values are unchanged. // (This function could be changed to infuse and check OOUI widgets, but that would only make it // slower and more complicated. It works fine to treat them as HTML elements.) function isPrefsChanged() { // eslint-disable-next-line no-jquery/no-sizzle var $inputs = $( '#mw-prefs-form :input[name]' ); for ( var index = 0; index < $inputs.length; index++ ) { var input = $inputs[ index ]; var $input = $( input ); // Different types of inputs have different methods for accessing defaults if ( $input.is( 'select' ) ) { // <select> has the property defaultSelected for each option for ( var optIndex = 0; optIndex < input.options.length; optIndex++ ) { var opt = input.options[ optIndex ]; if ( opt.selected !== opt.defaultSelected ) { return true; } } } else if ( $input.is( 'input' ) || $input.is( 'textarea' ) ) { // <input> has defaultValue or defaultChecked var inputType = input.type; if ( inputType === 'radio' || inputType === 'checkbox' ) { if ( input.checked !== input.defaultChecked ) { return true; } } else if ( input.value !== input.defaultValue ) { return true; } } } return false; } var saveButton = OO.ui.infuse( $( '#prefcontrol' ) ); // Disable the button to save preferences unless preferences have changed // Check if preferences have been changed before JS has finished loading saveButton.setDisabled( !isPrefsChanged() ); // Attach capturing event handlers to the document, to catch events inside OOUI dropdowns: // * Use capture because OO.ui.SelectWidget also does, and it stops event propagation, // so the event is not fired on descendant elements // * Attach to the document because the dropdowns are in the .oo-ui-defaultOverlay element // (and it doesn't exist yet at this point, so we can't attach them to it) [ 'change', 'keyup', 'mouseup' ].forEach( function ( eventType ) { document.addEventListener( eventType, function () { // Make sure SelectWidget's event handlers run first setTimeout( function () { saveButton.setDisabled( !isPrefsChanged() ); } ); }, true ); } ); // Prompt users if they try to leave the page without saving. var allowCloseWindow = mw.confirmCloseWindow( { test: isPrefsChanged } ); $( '#mw-prefs-form' ).on( 'submit', allowCloseWindow.release ); } ); }() );
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