javascript - Check if object is a jQuery object -

-

क्या कोई ऑब्जेक्ट एक jQuery ऑब्जेक्ट या एक नेटवर्जिक जावास्क्रिप्ट ऑब्जेक्ट है यह जाँचने का एक तेज़ तरीका है?

उदाहरण: 

  var o = {}; Var ई = $ ('# तत्व'); फ़ंक्शन doStuff (ओ) {if (o.selector) {console.log ('ऑब्जेक्ट है jQuery'); }} डस्टफॉम (ओ); doStuff (ई);

जाहिर है, कोड ऊपर काम करता है लेकिन यह सुरक्षित नहीं है। आप संभावित रूप से o ऑब्जेक्ट के लिए एक चयनकर्ता कुंजी जोड़ सकते हैं और उसी परिणाम प्राप्त कर सकते हैं। (typeof obj == 'jquery') के साथ लाइन में कुछ

आप ऑपरेटर का उपयोग कर सकते हैं: 

  obj instance of jQuery

स्पष्टीकरण : jQuery फ़ंक्शन (उर्फ $ ) एक के रूप में कार्यान्वित किया जाता है $ (foo) को कॉल करते समय, आंतरिक रूप से jQuery इसका नया jQuery में अनुवाद करते हैं; नया उपसर्ग।

(foo) 1 । jQuery की एक नई घटना को इंगित करने के लिए, यह अंदर यह आरंभ करने के लिए जावास्क्रिप्ट प्राप्ति, jQuery.prototype उर्फ jQuery.fn )। है true ।

1 यह वास्तव में नया jQuery.prototype.init (foo) है: कन्स्ट्रक्टर लॉजिक को init नामक किसी अन्य कन्स्ट्रक्टर फ़ंक्शन में ऑफलोड किया गया है, लेकिन अवधारणा एक ही है ।


Comments

Post a Comment

Popular posts from this blog

c# - How to capture HTTP packet with SharpPcap -

-
I would like to capture all incoming HTTP packets on my machine. To do this, I am using SharpPcap which is a WinPcap The cover is. SharpPcap works very well, but it captures TCP packets and what it wants to do for me is a very low level. Does anyone know how can I easily get full HTTP requests / reactions from all these TCP packets? Thanks SharpPcap is already able to capture the packet in the same way That's what the virus does (just in the code instead of the GUI). And you can either either parse them directly or you can put them in the drive in the common .pcap file format. The steps to parse the capture are: Open a connection at any time Loop a while Or start capturing using an event callback Parsing the raw packet for the type you want If you are reading .PPP dump files In addition to calling you an offline capture reader is almost the same, there is no need to select an interface, and you can set the majority There is no need to do the modes. All st...
Read more

php - Multiple Select with Explode: only returns the word "Array" -

-
By using Wordpress I have created a multiple selection box so that users can select categories to exclude. When the page is initially loaded, I see my predefined default option. However, when I select a new value and I save ... I only see the word "Array" and have not chosen anything else? & lt; Class = "amultiple" id = "& lt; php echo $ value ['id'] ;? gt;" name = "& gt; php echo $ value ['id'] ;; gt; []" Multiple = "multiple" size = "8" & gt; & Lt ;? Php global option; Foreign currency ($ value as value $) {if (get_settings ($ value ['id']) === FALSE {$$ value ['id'] = $ value ['std']; } And {$$ value ['id'] = get_settings ($ value ['id']); }} $ Ranges = & amp; Amp; Categories ('type = post & orderbiz = name & amp; hide_empty = 1'); If ($ ranges) {$ ex_cat = implode (',', $ tt_cat_exclude); Forex Currency ($ range a...
Read more

php - jQuery AJAX Post not working -

-
I do not understand why this script does not work. It has something to do within AJAX PostScript / Function. Right now, when I submit my form, it runs php code on the same page. What it should do, send the values ​​of the form for Project_Azax.fp, then there will be a refund of success on the page which is correct or false. $ (document) .ready (function () {$ ('div # didIt'). Hide (); $ ('form [name = adminForm]'). Submit (function () ($ {'.post' ('/ project_ajax.php', {action: $ ('[name = action]') Val (), pId: $ ('[name = pId]'). Val (), name ('[Name = name]'. Val (), url: $ ('[url = url]'). Val (), summary: ('[summary = summary]'). Val ()}, Function (data) {if (data.success) {$ ('div # didIt') .Sliddown ('slow');} and {warning ('unsuccessful SA!');}}, 'Jason'); return false ;});}); What is the code for project_ajax.php below ... if ($ _ POST ['action'] == ...
Read more