{"id":3988,"date":"2021-07-29T07:42:44","date_gmt":"2021-07-29T07:42:44","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=3988"},"modified":"2021-07-29T07:42:45","modified_gmt":"2021-07-29T07:42:45","slug":"ajax-dejstvie","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/uk\/ajax-dejstvie\/","title":{"rendered":"AJAX \u2014 \u0414\u0435\u0439\u0441\u0442\u0432\u0438\u0435"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u042d\u0442\u0430 \u0433\u043b\u0430\u0432\u0430 \u0434\u0430\u0435\u0442 \u0432\u0430\u043c \u0447\u0435\u0442\u043a\u043e\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043e \u0442\u043e\u0447\u043d\u044b\u0445 \u0448\u0430\u0433\u0430\u0445 \u0440\u0430\u0431\u043e\u0442\u044b AJAX.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0428\u0430\u0433\u0438 \u0440\u0430\u0431\u043e\u0442\u044b AJAX<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u0421\u043e\u0431\u044b\u0442\u0438\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442.<\/li><li>\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u0441\u043e\u0437\u0434\u0430\u043d.<\/li><li>\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043d.<\/li><li>\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u044b\u0439 \u0437\u0430\u043f\u0440\u043e\u0441 \u043a \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440\u0443.<\/li><li>\u0412\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0438\u0439 \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442 XML.<\/li><li>\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442 \u0444\u0443\u043d\u043a\u0446\u0438\u044e callback () \u0438 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442.<\/li><li>HTML DOM \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u0441\u0434\u0435\u043b\u0430\u0435\u043c \u044d\u0442\u0438 \u0448\u0430\u0433\u0438 \u043e\u0434\u0438\u043d \u0437\u0430 \u0434\u0440\u0443\u0433\u0438\u043c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u041f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u0441\u043e\u0431\u044b\u0442\u0438\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0430<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u0424\u0443\u043d\u043a\u0446\u0438\u044f JavaScript \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0441\u043e\u0431\u044b\u0442\u0438\u044f.<\/li><li>\u041f\u0440\u0438\u043c\u0435\u0440 \u2014&nbsp;<em>validateUserId ()<\/em>&nbsp;\u0424\u0443\u043d\u043a\u0446\u0438\u044f JavaScript \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0435\u0442\u0441\u044f \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 \u0441\u043e\u0431\u044b\u0442\u0438\u044f \u043d\u0430 \u0441\u043e\u0431\u044b\u0442\u0438\u0435&nbsp;<em>onkeyup<\/em>&nbsp;\u0432 \u043f\u043e\u043b\u0435 \u0444\u043e\u0440\u043c\u044b \u0432\u0432\u043e\u0434\u0430, \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d \u043d\u0430&nbsp;<em>\u00ab\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u00bb<\/em><\/li><li>&lt;input type = \u00abtext\u00bb size = \u00ab20\u00bb id = \u00abuserid\u00bb name = \u00abid\u00bb onkeyup = \u00abvalidateUserId ();\u00bb&gt;.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0424\u0443\u043d\u043a\u0446\u0438\u044f JavaScript \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0441\u043e\u0431\u044b\u0442\u0438\u044f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u0440\u0438\u043c\u0435\u0440 \u2014&nbsp;<em>validateUserId ()<\/em>&nbsp;\u0424\u0443\u043d\u043a\u0446\u0438\u044f JavaScript \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0435\u0442\u0441\u044f \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430 \u0441\u043e\u0431\u044b\u0442\u0438\u044f \u043d\u0430 \u0441\u043e\u0431\u044b\u0442\u0438\u0435&nbsp;<em>onkeyup<\/em>&nbsp;\u0432 \u043f\u043e\u043b\u0435 \u0444\u043e\u0440\u043c\u044b \u0432\u0432\u043e\u0434\u0430, \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d \u043d\u0430&nbsp;<em>\u00ab\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u00bb<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&lt;input type = \u00abtext\u00bb size = \u00ab20\u00bb id = \u00abuserid\u00bb name = \u00abid\u00bb onkeyup = \u00abvalidateUserId ();\u00bb&gt;.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u0441\u043e\u0437\u0434\u0430\u043d<\/h2>\n\n\n\n<pre class=\"wp-block-preformatted\">var ajaxRequest;  \/\/ The variable that makes Ajax possible!\nfunction ajaxFunction() {\n   try {\n      \/\/ Opera 8.0+, Firefox, Safari\n      ajaxRequest = new XMLHttpRequest();\n   } catch (e) {\n   \n      \/\/ Internet Explorer Browsers\n      try {\n         ajaxRequest = new ActiveXObject(\"Msxml2.XMLHTTP\");\n      } catch (e) {\n      \n         try {\n            ajaxRequest = new ActiveXObject(\"Microsoft.XMLHTTP\");\n         } catch (e) {\n      \n            \/\/ Something went wrong\n            alert(\"Your browser broke!\");\n            return false;\n         }\n      }\n   }\n}<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u041d\u0430 \u044d\u0442\u043e\u043c \u0448\u0430\u0433\u0435 \u043c\u044b \u043d\u0430\u043f\u0438\u0448\u0435\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u044e, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0443\u0434\u0435\u0442 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c \u0441\u043e\u0431\u044b\u0442\u0438\u0435\u043c, \u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u043e\u0431\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0432\u044b\u0437\u043e\u0432\u0430 processRequest () \u0431\u0443\u0434\u0435\u0442 \u0437\u0430\u0440\u0435\u0433\u0438\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">function validateUserId() {\n   ajaxFunction();\n   \n   \/\/ Here processRequest() is the callback function.\n   ajaxRequest.onreadystatechange = processRequest;\n   \n   if (!target) target = document.getElementById(\"userid\");\n   var url = \"validate?id=\" + escape(target.value);\n   \n   ajaxRequest.open(\"GET\", url, true);\n   ajaxRequest.send(null);\n}<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u0412\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0433\u043e \u0437\u0430\u043f\u0440\u043e\u0441\u0430 \u043a \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440\u0443<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0439 \u043a\u043e\u0434 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0432 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u043e\u043c \u0432\u044b\u0448\u0435 \u0444\u0440\u0430\u0433\u043c\u0435\u043d\u0442\u0435 \u043a\u043e\u0434\u0430.&nbsp;\u041a\u043e\u0434, \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u043d\u044b\u0439 \u0436\u0438\u0440\u043d\u044b\u043c \u0448\u0440\u0438\u0444\u0442\u043e\u043c, \u043e\u0442\u0432\u0435\u0447\u0430\u0435\u0442 \u0437\u0430 \u0437\u0430\u043f\u0440\u043e\u0441 \u043a \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440\u0443.&nbsp;\u0412\u0441\u0435 \u044d\u0442\u043e \u0434\u0435\u043b\u0430\u0435\u0442\u0441\u044f \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043e\u0431\u044a\u0435\u043a\u0442\u0430 XMLHttpRequest&nbsp;<em>ajaxRequest<\/em>&nbsp;.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">function validateUserId() {\n   ajaxFunction();\n   \n   \/\/ Here processRequest() is the callback function.\n   ajaxRequest.onreadystatechange = processRequest;\n   \n   <strong>if (!target) target = document.getElementById(\"userid\");\n   var url = \"validate?id = \" + escape(target.value);\n   \n   ajaxRequest.open(\"GET\", url, true);\n   ajaxRequest.send(null);<\/strong>\n}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u0440\u0435\u0434\u043f\u043e\u043b\u043e\u0436\u0438\u043c, \u0432\u044b \u0432\u0432\u043e\u0434\u0438\u0442\u0435 Zara \u0432 \u043f\u043e\u043b\u0435 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u0430 \u0437\u0430\u0442\u0435\u043c \u0432 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u043e\u043c \u0432\u044b\u0448\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u0435 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442\u0441\u044f URL \u00abvalidate? Id = Zara\u00bb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0412\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0438\u0439 XML-\u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u0432\u043e\u0439 \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u044b\u0439 \u0441\u043a\u0440\u0438\u043f\u0442 \u043d\u0430 \u043b\u044e\u0431\u043e\u043c \u044f\u0437\u044b\u043a\u0435, \u043e\u0434\u043d\u0430\u043a\u043e \u0435\u0433\u043e \u043b\u043e\u0433\u0438\u043a\u0430 \u0434\u043e\u043b\u0436\u043d\u0430 \u0431\u044b\u0442\u044c \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0439.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u041f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441 \u043e\u0442 \u043a\u043b\u0438\u0435\u043d\u0442\u0430.<\/li><li>\u0420\u0430\u0437\u043e\u0431\u0440\u0430\u0442\u044c \u0432\u0432\u043e\u0434 \u043e\u0442 \u043a\u043b\u0438\u0435\u043d\u0442\u0430.<\/li><li>\u0414\u0435\u043b\u0430\u0442\u044c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438.<\/li><li>\u041e\u0442\u043f\u0440\u0430\u0432\u044c\u0442\u0435 \u0432\u044b\u0432\u043e\u0434 \u043a\u043b\u0438\u0435\u043d\u0442\u0443.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0415\u0441\u043b\u0438 \u043c\u044b \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u043c, \u0447\u0442\u043e \u0432\u044b \u0441\u043e\u0431\u0438\u0440\u0430\u0435\u0442\u0435\u0441\u044c \u043d\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0441\u0435\u0440\u0432\u043b\u0435\u0442, \u0442\u043e \u0432\u043e\u0442 \u0444\u0440\u0430\u0433\u043c\u0435\u043d\u0442 \u043a\u043e\u0434\u0430.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public void doGet(HttpServletRequest request,\n   HttpServletResponse response) throws IOException, ServletException {\n   String targetId = request.getParameter(\"id\");\n   \n   if ((targetId != null) &amp;&amp; !accounts.containsKey(targetId.trim())) {\n      response.setContentType(\"text\/xml\");\n      response.setHeader(\"Cache-Control\", \"no-cache\");\n      response.getWriter().write(\"&lt;valid&gt;true&lt;\/valid&gt;\");\n   } else {\n      response.setContentType(\"text\/xml\");\n      response.setHeader(\"Cache-Control\", \"no-cache\");\n      response.getWriter().write(\"&lt;valid&gt;false&lt;\/valid&gt;\");\n   }\n}<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u0412\u044b\u0437\u0432\u0430\u043d\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u043e\u0431\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0432\u044b\u0437\u043e\u0432\u0430 processRequest ()<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u0431\u044b\u043b \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043d \u0434\u043b\u044f \u0432\u044b\u0437\u043e\u0432\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 processRequest () \u043f\u0440\u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f&nbsp;<em>readyState<\/em>&nbsp;\u043e\u0431\u044a\u0435\u043a\u0442\u0430&nbsp;<em>XMLHttpRequest<\/em>&nbsp;.&nbsp;\u0422\u0435\u043f\u0435\u0440\u044c \u044d\u0442\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043e\u0442 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u0443\u044e \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443.&nbsp;\u041a\u0430\u043a \u0438 \u0432 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u043c \u043f\u0440\u0438\u043c\u0435\u0440\u0435, \u043e\u043d \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442 \u0434\u043b\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 true \u0438\u043b\u0438 false \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0435\u043d\u043d\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0441 \u0432\u0435\u0431-\u0441\u0435\u0440\u0432\u0435\u0440\u0430.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"> \nfunction processRequest() {\n   if (req.readyState == 4) {\n      if (req.status == 200) {\n         var message = ...;\n...\n}<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">HTML DOM \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u042d\u0442\u043e \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0439 \u0448\u0430\u0433, \u0438 \u043d\u0430 \u044d\u0442\u043e\u043c \u044d\u0442\u0430\u043f\u0435 \u0432\u0430\u0448\u0430 HTML-\u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430 \u0431\u0443\u0434\u0435\u0442 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0430.&nbsp;\u042d\u0442\u043e \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u2014<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>JavaScript \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u0442 \u0441\u0441\u044b\u043b\u043a\u0443 \u043d\u0430 \u043b\u044e\u0431\u043e\u0439 \u044d\u043b\u0435\u043c\u0435\u043d\u0442 \u043d\u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0435, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f DOM API.<\/li><li>\u0420\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u043c\u044b\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0441\u0441\u044b\u043b\u043a\u0443 \u043d\u0430 \u044d\u043b\u0435\u043c\u0435\u043d\u0442 \u2014 \u0432\u044b\u0437\u0432\u0430\u0442\u044c.<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-preformatted\">document.getElementById(\"userIdMessage\"), \n\/\/ where \"userIdMessage\" is the ID attribute \n\/\/ of an element appearing in the HTML document<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u0422\u0435\u043f\u0435\u0440\u044c JavaScript \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0430\u0442\u0440\u0438\u0431\u0443\u0442\u043e\u0432 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0430;&nbsp;\u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 \u0441\u0442\u0438\u043b\u044f \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0430;&nbsp;\u0438\u043b\u0438 \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c, \u0443\u0434\u0430\u043b\u0438\u0442\u044c \u0438\u043b\u0438 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0434\u043e\u0447\u0435\u0440\u043d\u0438\u0435 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b.&nbsp;\u0412\u043e\u0442 \u043f\u0440\u0438\u043c\u0435\u0440 \u2014<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0422\u0435\u043f\u0435\u0440\u044c JavaScript \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0430\u0442\u0440\u0438\u0431\u0443\u0442\u043e\u0432 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0430;&nbsp;\u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 \u0441\u0442\u0438\u043b\u044f \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0430;&nbsp;\u0438\u043b\u0438 \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c, \u0443\u0434\u0430\u043b\u0438\u0442\u044c \u0438\u043b\u0438 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0434\u043e\u0447\u0435\u0440\u043d\u0438\u0435 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b.&nbsp;\u0412\u043e\u0442 \u043f\u0440\u0438\u043c\u0435\u0440 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;script type = \"text\/javascript\"&gt;\n   &lt;!--\n   function setMessageUsingDOM(message) {\n      var userMessageElement = document.getElementById(\"userIdMessage\");\n      var messageText;\n      \n      if (message == \"false\") {\n         userMessageElement.style.color = \"red\";\n         messageText = \"Invalid User Id\";\n      } else {\n         userMessageElement.style.color = \"green\";\n         messageText = \"Valid User Id\";\n      }\n      \n      var messageBody = document.createTextNode(messageText);\n      \n      \/\/ if the messageBody element has been created simple \n      \/\/ replace it otherwise append the new element\n      if (userMessageElement.childNodes[0]) {\n         userMessageElement.replaceChild(messageBody, userMessageElement.childNodes[0]);\n      } else {\n         userMessageElement.appendChild(messageBody);\n      }\n   }\n   --&gt;\n&lt;\/script&gt;\n\n&lt;body&gt;\n   &lt;div id = \"userIdMessage\"&gt;&lt;div&gt;\n&lt;\/body&gt;<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0415\u0441\u043b\u0438 \u0432\u044b \u043f\u043e\u043d\u044f\u043b\u0438 \u0432\u044b\u0448\u0435\u0443\u043f\u043e\u043c\u044f\u043d\u0443\u0442\u044b\u0435 \u0441\u0435\u043c\u044c \u0448\u0430\u0433\u043e\u0432, \u0442\u043e \u0432\u044b \u043f\u043e\u0447\u0442\u0438 \u0437\u0430\u043a\u043e\u043d\u0447\u0438\u043b\u0438 \u0441 AJAX.&nbsp;\u0412 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0439 \u0433\u043b\u0430\u0432\u0435 \u043c\u044b \u0443\u0432\u0438\u0434\u0438\u043c \u043e\u0431\u044a\u0435\u043a\u0442&nbsp;<em>XMLHttpRequest<\/em>&nbsp;\u0431\u043e\u043b\u0435\u0435 \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u042d\u0442\u0430 \u0433\u043b\u0430\u0432\u0430 \u0434\u0430\u0435\u0442 \u0432\u0430\u043c \u0447\u0435\u0442\u043a\u043e\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043e \u0442\u043e\u0447\u043d\u044b\u0445 \u0448\u0430\u0433\u0430\u0445 \u0440\u0430\u0431\u043e\u0442\u044b AJAX. \u0428\u0430\u0433\u0438 \u0440\u0430\u0431\u043e\u0442\u044b AJAX \u0421\u043e\u0431\u044b\u0442\u0438\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442. \u041e\u0431\u044a\u0435\u043a\u0442 XMLHttpRequest \u0441\u043e\u0437\u0434\u0430\u043d. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[125],"tags":[],"class_list":["post-3988","page","type-page","status-publish","hentry","category-ajax"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/3988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/comments?post=3988"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/3988\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/media?parent=3988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/categories?post=3988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/tags?post=3988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}