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Edit File: wp-util.js
/** * @output wp-includes/js/wp-util.js */ /* global _wpUtilSettings */ /** @namespace wp */ window.wp = window.wp || {}; (function ($) { // Check for the utility settings. var settings = typeof _wpUtilSettings === 'undefined' ? {} : _wpUtilSettings; /** * wp.template( id ) * * Fetch a JavaScript template for an id, and return a templating function for it. * * @param {string} id A string that corresponds to a DOM element with an id prefixed with "tmpl-". * For example, "attachment" maps to "tmpl-attachment". * @return {function} A function that lazily-compiles the template requested. */ wp.template = _.memoize(function ( id ) { var compiled, /* * Underscore's default ERB-style templates are incompatible with PHP * when asp_tags is enabled, so WordPress uses Mustache-inspired templating syntax. * * @see trac ticket #22344. */ options = { evaluate: /<#([\s\S]+?)#>/g, interpolate: /\{\{\{([\s\S]+?)\}\}\}/g, escape: /\{\{([^\}]+?)\}\}(?!\})/g, variable: 'data' }; return function ( data ) { var el = document.querySelector( 'script#tmpl-' + id ); if ( ! el ) { throw new Error( 'Template not found: ' + '#tmpl-' + id ); } compiled = compiled || _.template( $( el ).html(), options ); return compiled( data ); }; }); /* * wp.ajax * ------ * * Tools for sending ajax requests with JSON responses and built in error handling. * Mirrors and wraps jQuery's ajax APIs. */ wp.ajax = { settings: settings.ajax || {}, /** * wp.ajax.post( [action], [data] ) * * Sends a POST request to WordPress. * * @param {(string|Object)} action The slug of the action to fire in WordPress or options passed * to jQuery.ajax. * @param {Object=} data Optional. The data to populate $_POST with. * @return {$.promise} A jQuery promise that represents the request, * decorated with an abort() method. */ post: function( action, data ) { return wp.ajax.send({ data: _.isObject( action ) ? action : _.extend( data || {}, { action: action }) }); }, /** * wp.ajax.send( [action], [options] ) * * Sends a POST request to WordPress. * * @param {(string|Object)} action The slug of the action to fire in WordPress or options passed * to jQuery.ajax. * @param {Object=} options Optional. The options passed to jQuery.ajax. * @return {$.promise} A jQuery promise that represents the request, * decorated with an abort() method. */ send: function( action, options ) { var promise, deferred; if ( _.isObject( action ) ) { options = action; } else { options = options || {}; options.data = _.extend( options.data || {}, { action: action }); } options = _.defaults( options || {}, { type: 'POST', url: wp.ajax.settings.url, context: this }); deferred = $.Deferred( function( deferred ) { // Transfer success/error callbacks. if ( options.success ) { deferred.done( options.success ); } if ( options.error ) { deferred.fail( options.error ); } delete options.success; delete options.error; // Use with PHP's wp_send_json_success() and wp_send_json_error(). deferred.jqXHR = $.ajax( options ).done( function( response ) { // Treat a response of 1 as successful for backward compatibility with existing handlers. if ( response === '1' || response === 1 ) { response = { success: true }; } if ( _.isObject( response ) && ! _.isUndefined( response.success ) ) { // When handling a media attachments request, get the total attachments from response headers. var context = this; deferred.done( function() { if ( action && action.data && 'query-attachments' === action.data.action && deferred.jqXHR.hasOwnProperty( 'getResponseHeader' ) && deferred.jqXHR.getResponseHeader( 'X-WP-Total' ) ) { context.totalAttachments = parseInt( deferred.jqXHR.getResponseHeader( 'X-WP-Total' ), 10 ); } else { context.totalAttachments = 0; } } ); deferred[ response.success ? 'resolveWith' : 'rejectWith' ]( this, [response.data] ); } else { deferred.rejectWith( this, [response] ); } }).fail( function() { deferred.rejectWith( this, arguments ); }); }); promise = deferred.promise(); promise.abort = function() { deferred.jqXHR.abort(); return this; }; return promise; } }; }(jQuery));