{"id":24499,"date":"2024-02-15T14:53:34","date_gmt":"2024-02-15T22:53:34","guid":{"rendered":"https:\/\/docs.extraview.com\/v25\/book\/overriding-inbuilt-functions-1\/"},"modified":"2025-02-18T08:32:42","modified_gmt":"2025-02-18T16:32:42","slug":"overriding-inbuilt-functions-1","status":"publish","type":"page","link":"https:\/\/docs.extraview.com\/v25\/extraview-25\/user-custom-guide-1\/javascript-interface-1\/overriding-inbuilt-functions-1\/","title":{"rendered":"Overriding Inbuilt Functions"},"content":{"rendered":"<p>Occasionally it is useful to replace the standard functionality of an ExtraView inbuilt JavaScript function with a user-defined JavaScript function. You can use JavaScript&#8217;s ability to return a Boolean answer in response to a query on the existence of a method. As an example, you may want to override the inbuilt ExtraView JavaScript function named <span class=\"fixedWidthFont\">SubmitChange<\/span>. This method lives within a JavaScript file that is accessed from the <em>Add Issue<\/em> screen, named AddEdit.js.<\/p>\n<ul>\n<li>\n\t\tThe ExtraView JavaScript functions are located in the main ExtraView code directory on the application server, within the directory name javascript. Within this directory, another directory named user_javascript contains the user-defined JavaScript functions<\/li>\n<li>\n\t\tCreate a function named <span class=\"fixedWidthFont\">userSubmitChange<\/span> in the file AddEdit.js<\/li>\n<li>\n\t\tIn the UserJavaScript.js file, create a function named <span class=\"fixedWidthFont\">_userSubmitChange<\/span>, which actually performs the task needed<\/li>\n<li>\n\t\tNow you can call <span class=\"fixedWidthFont\">userSubmitChange<\/span>, which will look like the following code snippet \u2013<\/p>\n<pre class=\"code\">\r\n    \/**\r\n     * this will call the _userSubmitChange if \r\n     * it is defined, else it calls submitChange\r\n     *\/\r\n    function userSubmitChange(field){\r\n        if(_userSubmitChange){\r\n            _userSubmitChange(field);\r\n        } else {\r\n            submitChange(field);\r\n        }\r\n    }\r\n<\/pre>\n<\/li>\n<\/ul>\n<p>If the function <span class=\"fixedWidthFont\">_userSubmitChange<\/span> doesn&#8217;t exist in the UserJavaScript.js file, then the standard <span class=\"fixedWidthFont\">submitChange<\/span> function is used instead. Its existence is assured as it is contained in the standard ExtraView distribution file.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Occasionally it is useful to replace the standard functionality of an ExtraView inbuilt JavaScript function with a user-defined JavaScript function. You can use JavaScript&#8217;s ability to return a Boolean answer in response to a query on the existence of a method. As an example, you may want to override the inbuilt ExtraView JavaScript function named&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":24483,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_lmt_disableupdate":"no","_lmt_disable":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"class_list":["post-24499","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Overriding Inbuilt Functions - Product Documentation<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/docs.extraview.com\/v25\/extraview-25\/user-custom-guide-1\/javascript-interface-1\/overriding-inbuilt-functions-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Overriding Inbuilt Functions - Product Documentation\" \/>\n<meta property=\"og:description\" content=\"Occasionally it is useful to replace the standard functionality of an ExtraView inbuilt JavaScript function with a user-defined JavaScript function. 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