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+/**
+ * HTML5 placeholder emulation for jQuery plugin
+ *
+ * This will automatically use the HTML5 placeholder attribute if supported, or emulate this behavior if not.
+ *
+ * @author Trevor Parscal <tparscal@wikimedia.org>
+ * @author Krinkle <krinklemail@gmail.com>
+ * @version 0.2.0
+ * @license GPL v2
+ */
+( function( $ ) {
+
+jQuery.fn.placeholder = function() {
+
+ return this.each( function() {
+
+ // If the HTML5 placeholder attribute is supported, use it
+ if ( this.placeholder && 'placeholder' in document.createElement( this.tagName ) ) {
+ return;
+ }
+
+ var placeholder = this.getAttribute('placeholder');
+ var $input = jQuery(this);
+
+ // Show initially, if empty
+ if ( this.value === '' || this.value == placeholder ) {
+ $input.addClass( 'placeholder' ).val( placeholder );
+ }
+
+ $input
+ // Show on blur if empty
+ .blur( function() {
+ if ( this.value === '' ) {
+ this.value = placeholder;
+ $input.addClass( 'placeholder' );
+ }
+ } )
+
+ // Hide on focus
+ // Also listen for other events in case $input was
+ // already focused when the events were bound
+ .bind( 'focus drop keydown paste', function( e ) {
+ if ($input.hasClass('placeholder')) {
+ if ( e.type == 'drop' && e.originalEvent.dataTransfer ) {
+ // Support for drag&drop. Instead of inserting the dropped
+ // text somewhere in the middle of the placeholder string,
+ // we want to set the contents of the search box to the
+ // dropped text.
+
+ // IE wants getData( 'text' ) but Firefox wants getData( 'text/plain' )
+ // Firefox fails gracefully with an empty string, IE barfs with an error
+ try {
+ // Try the Firefox way
+ this.value = e.originalEvent.dataTransfer.getData( 'text/plain' );
+ } catch ( exception ) {
+ // Got an exception, so use the IE way
+ this.value = e.originalEvent.dataTransfer.getData( 'text' );
+ }
+
+ // On Firefox, drop fires after the dropped text has been inserted,
+ // but on IE it fires before. If we don't prevent the default action,
+ // IE will insert the dropped text twice.
+ e.preventDefault();
+ } else {
+ this.value = '';
+ }
+ $input.removeClass( 'placeholder' );
+ }
+ } );
+
+ // Blank on submit -- prevents submitting with unintended value
+ this.form && $( this.form ).submit( function() {
+ // $input.trigger( 'focus' ); would be problematic
+ // because it actually focuses $input, leading
+ // to nasty behavior in mobile browsers
+ if ( $input.hasClass('placeholder') ) {
+ $input
+ .val( '' )
+ .removeClass( 'placeholder' );
+ }
+ });
+
+ });
+};
+} )( jQuery );