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POWeird JavaScript code that can't live without console.log()
 

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  1. POWeird JavaScript code that can't live without console.log()
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    <p>I got this very weird code: <strong>No debug, no work!</strong> I am almost crazy about it. </p> <p>The code is to show an notification in Chrome. That's lot of comments among the code.</p> <p>Look at the !!IMPORTANT&amp;&amp;WEIRD!!, next line is "console.log(_notification);" that can't be omitted, if it does, no events bind could work. </p> <p>Though now the code works OK, but I just curious about this, why I can't remove "console.log(_notification);" ?</p> <pre><code> /** * Notification * @author: ijse * @require: Chrome10+ * @params: same as webkitNotifications.create[HTML]Notification() * @usage: * new Notify("http://www.baidu.com").onshow(function() { * alert("show"); * }).onclose(function() { * alert("close"); * }).show(); */ var Notify = function() { var _params = arguments; // Validate arguments if(_params.length == 0) { console.error("Notify need at least one argument"); return ; } // Check browser support if(!window.webkitNotifications) { console.error("Your browser does not support webkitNotifications feature!!"); return ; } var _onclose, _onclick, _onerror, _onshow; var _notification, _replaceId, _showFlag = false; function bindEvents() { // Add event listeners // In W3C, display event is called show _notification.addEventListener("display", _onshow, false); _notification.addEventListener("click", _onclick, false); _notification.addEventListener("error", _onerror, false); _notification.addEventListener("close", _onclose, false); if(_replaceId) _notification.replaceId = _replaceId; // !!IMPORTANT&amp;&amp;WEIRD!! remove next line no events will work console.log(_notification); } function createfn(permission) { // About permission on Chrome: // PERMISSION_ALLOWED (0) indicates that the user has granted permission to scripts with this origin to show notifications. // PERMISSION_NOT_ALLOWED (1) indicates that the user has not taken an action regarding notifications for scripts from this origin. // PERMISSION_DENIED (2) indicates that the user has explicitly blocked scripts with this origin from showing notifications. if(permission == 0) { // If permission is allowed // Create notification if(_params.length == 1) _notification = window.webkitNotifications.createHTMLNotification(_params[0]); else _notification = window.webkitNotifications.createNotification(_params[0],_params[1],_params[2]); // Bind events console.log("bind event in createfn"); bindEvents(); // Show, if yes flag !!_showFlag &amp;&amp; _notification.show(); } else { if(_onerror) _onerror.call(this); console.error("Notification permission is denied!!"); } } // If permission already allowed, do not require again if(window.webkitNotifications.checkPermission() != 0) { // Require permission from user window.webkitNotifications.requestPermission(function() { createfn.call(this, window.webkitNotifications.checkPermission()); }); } else { createfn.call(this, window.webkitNotifications.checkPermission()); } // Return handler methods return { onclose: function(fn) { _onclose = fn; console.log(1); return this; }, onclick: function(fn) { _onclick = fn; console.log(2); return this; }, onerror: function(fn) { _onerror = fn; console.log(3); return this; }, onshow : function(fn) { _onshow = fn; console.log(4); return this; }, show: function(replaceId) { console.log("method show"); _replaceId = replaceId; if(_notification) { // Notification already been created bindEvents(); _notification.show(); } else { // Flag yes to show _showFlag = true; } return _notification; }, cancel: function() { _notification.cancel(); } } // return handler } new Notify("","Success!!", "Welcome to use empcy!!").onshow(function() { var that = this; window.setTimeout(function() { that.cancel(); }, 3000); }).onclose(function() { alert("close"); }).onclick(function() { alert("clicked"); }).show("Welcome"); </code></pre>
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    1. COWhat is your question?
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    2. COerm, if the plugin is for displaying notifications in chromes debugger, why would you remove console.log? Seems like it's intentional
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    3. COtry to remove the code "console.log(_notification); ", and all events( such as click, close etc..) that bind won't work.
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