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jquery Programming Glossary: constructorWhat is the cost of '$(this)'? http://stackoverflow.com/questions/10433014/what-is-the-cost-of-this the scenes when you pass a DOM element to the jQuery constructor javascript jquery performance share improve this question..
Difference of the value, prototype and property http://stackoverflow.com/questions/12143590/difference-of-the-value-prototype-and-property function arg The jQuery object is actually just the init constructor 'enhanced' return new jQuery.fn.init arg jQuery.fn jQuery.prototype.. return new jQuery.fn.init arg jQuery.fn jQuery.prototype constructor jQuery init function selector context rootjQuery get the selected.. that pattern too. They have an init function which is the constructor of all jQuery instances the jQuery function itself is just a..
Why jQuery do this: jQuery.fn.init.prototype = jQuery.fn? http://stackoverflow.com/questions/1755080/why-jquery-do-this-jquery-fn-init-prototype-jquery-fn prototype as the jQuery object. So when you call init as a constructor in the return new jQuery.fn.init selector context statement.. it constructs. This lets init substitute for the jQuery constructor itself. What you achieve is that the object returned from a..
Check if object is a jQuery object http://stackoverflow.com/questions/1853223/check-if-object-is-a-jquery-object Explanation the jQuery function aka is implemented as a constructor function . Constructor functions are to be called with the new.. foo 1 . JavaScript proceeds to initialize this inside the constructor function to point to a new instance of jQuery setting it's properties.. true . 1 It's actually new jQuery.prototype.init foo the constructor logic has been offloaded to another constructor function called..
http://stackoverflow.com/questions/206384/how-to-format-a-json-date at the end. The resulting number is passed into the Date constructor. EDIT I have intentionally left out the radix the 2nd argument.. formatted JSON dates just pass the string into the Date constructor var date new Date jsonDate no ugly parsing needed full timezone..
$(this) selector and children? http://stackoverflow.com/questions/306583/this-selector-and-children selectors this share improve this question The jQuery constructor accepts a 2nd parameter which can be used to override the context..
http://stackoverflow.com/questions/4083351/what-does-jquery-fn-mean the prototype property. The jQuery identifier or is just a constructor function and all instances created with it inherit from the.. and all instances created with it inherit from the constructor's prototype. A simple constructor function function Test this.a.. with it inherit from the constructor's prototype. A simple constructor function function Test this.a 'a' Test.prototype.b 'b' var test..
Does using $this instead of $(this) provide a performance enhancement? http://stackoverflow.com/questions/5724400/does-using-this-instead-of-this-provide-a-performance-enhancement than a DOM object is repeatedly passed to the jQuery constructor e.g. 'p' . As for the use of var again always use var to declare..
Chrome Uncaught Syntax Error: Unexpected Token ILLEGAL [duplicate] http://stackoverflow.com/questions/5733275/chrome-uncaught-syntax-error-unexpected-token-illegal
How can jQuery behave like an object and a function? http://stackoverflow.com/questions/8734115/how-can-jquery-behave-like-an-object-and-a-function for defining jQuery plugins . jQuery.fn jQuery.prototype constructor jQuery init function ..parameters.. .... sets default properties..... the annotated source code jQuery core Definitions of the constructor and base methods. jQuery.fn.extend is used to add removeClass..
Check if object is a jQuery object http://stackoverflow.com/questions/1853223/check-if-object-is-a-jquery-object function aka is implemented as a constructor function . Constructor functions are to be called with the new prefix. When you call..
http://stackoverflow.com/questions/4797566/queue-ajax-calls Has a public append method that expects some kind of Task. Constructor expects a handler which is a method that takes a ajax task and..
How can jQuery deferred be used? http://stackoverflow.com/questions/4869609/how-can-jquery-deferred-be-used after previous one finishes . Class Buffer methods append Constructor takes a function which will be the task handler to be called..
http://stackoverflow.com/questions/5134208/jquery-oop-basics the canvas for some reason . Live example Inheritance var Constructor function name this.name name Constructor.prototype.mymethod.. Inheritance var Constructor function name this.name name Constructor.prototype.mymethod function alert my name is this.name var obj.. function alert my name is this.name var obj new Constructor foo obj.mymethod my name is foo Here were defining a Constructor..
Does 'this' refer to the element that called this function? http://stackoverflow.com/questions/5826467/does-this-refer-to-the-element-that-called-this-function to a variable var a function `this` is `window` a As a Constructor var C function `this` is `c` var c new C Note that if your forgot..
What is the cost of '$(this)'? http://stackoverflow.com/questions/10433014/what-is-the-cost-of-this really improve the performance of our code What happens behind the scenes when you pass a DOM element to the jQuery constructor javascript jquery performance share improve this question Inspired by this question on meta I'll answer my question...
Difference of the value, prototype and property http://stackoverflow.com/questions/12143590/difference-of-the-value-prototype-and-property correction is wellcomed function window undefined jQuery function arg The jQuery object is actually just the init constructor 'enhanced' return new jQuery.fn.init arg jQuery.fn jQuery.prototype constructor jQuery init function selector context rootjQuery.. object is actually just the init constructor 'enhanced' return new jQuery.fn.init arg jQuery.fn jQuery.prototype constructor jQuery init function selector context rootjQuery get the selected DOM el. and returns an array method function doSomeThing.. engineering share improve this question I don't like that pattern too. They have an init function which is the constructor of all jQuery instances the jQuery function itself is just a wrapper around that object creation with new function jQuery..
Why jQuery do this: jQuery.fn.init.prototype = jQuery.fn? http://stackoverflow.com/questions/1755080/why-jquery-do-this-jquery-fn-init-prototype-jquery-fn forum post is helpful It gives the init function the same prototype as the jQuery object. So when you call init as a constructor in the return new jQuery.fn.init selector context statement it uses that prototype for the object it constructs. This lets.. context statement it uses that prototype for the object it constructs. This lets init substitute for the jQuery constructor itself. What you achieve is that the object returned from a jQuery.fn.init constructor has access to jQuery methods. share..
Check if object is a jQuery object http://stackoverflow.com/questions/1853223/check-if-object-is-a-jquery-object You can use the instanceof operator obj instanceof jQuery Explanation the jQuery function aka is implemented as a constructor function . Constructor functions are to be called with the new prefix. When you call foo internally jQuery translates this.. you call foo internally jQuery translates this to new jQuery foo 1 . JavaScript proceeds to initialize this inside the constructor function to point to a new instance of jQuery setting it's properties to those found on jQuery.prototype aka jQuery.fn ... . Thus you get a new object where instanceof jQuery is true . 1 It's actually new jQuery.prototype.init foo the constructor logic has been offloaded to another constructor function called init but the concept is the same. share improve this answer..
http://stackoverflow.com/questions/206384/how-to-format-a-json-date and the parseInt function gets the integer and ignores the at the end. The resulting number is passed into the Date constructor. EDIT I have intentionally left out the radix the 2nd argument to parseInt see my comment below . Also I completely agree..
$(this) selector and children? http://stackoverflow.com/questions/306583/this-selector-and-children this How do I get the img with a selector jquery jquery selectors this share improve this question The jQuery constructor accepts a 2nd parameter which can be used to override the context of the selection. jQuery img this Which is the same as..
http://stackoverflow.com/questions/4083351/what-does-jquery-fn-mean question In jQuery the fn property is just an alias to the prototype property. The jQuery identifier or is just a constructor function and all instances created with it inherit from the constructor's prototype. A simple constructor function function.. property. The jQuery identifier or is just a constructor function and all instances created with it inherit from the constructor's prototype. A simple constructor function function Test this.a 'a' Test.prototype.b 'b' var test new Test test.a a own.. or is just a constructor function and all instances created with it inherit from the constructor's prototype. A simple constructor function function Test this.a 'a' Test.prototype.b 'b' var test new Test test.a a own property test.b b inherited property..
Does using $this instead of $(this) provide a performance enhancement? http://stackoverflow.com/questions/5724400/does-using-this-instead-of-this-provide-a-performance-enhancement Where real performance impacts arise is when a selector rather than a DOM object is repeatedly passed to the jQuery constructor e.g. 'p' . As for the use of var again always use var to declare new variables. By doing so the variable will only be accessible..
Chrome Uncaught Syntax Error: Unexpected Token ILLEGAL [duplicate] http://stackoverflow.com/questions/5733275/chrome-uncaught-syntax-error-unexpected-token-illegal
How can jQuery behave like an object and a function? http://stackoverflow.com/questions/8734115/how-can-jquery-behave-like-an-object-and-a-function selector context rootjQuery .fn jQuery.fn is a shorthand for defining jQuery plugins . jQuery.fn jQuery.prototype constructor jQuery init function ..parameters.. .... sets default properties... ....other methods such as size get etc... .... other.. interested in jQuery's real implementation have a look at the annotated source code jQuery core Definitions of the constructor and base methods. jQuery.fn.extend is used to add removeClass etc. to jQuery . jQuery 1.7.1 . share improve this answer..
Check if object is a jQuery object http://stackoverflow.com/questions/1853223/check-if-object-is-a-jquery-object operator obj instanceof jQuery Explanation the jQuery function aka is implemented as a constructor function . Constructor functions are to be called with the new prefix. When you call foo internally jQuery translates this to new jQuery foo 1..
http://stackoverflow.com/questions/4797566/queue-ajax-calls I'll show you an implementation in a second. Buffer class. Has a public append method that expects some kind of Task. Constructor expects a handler which is a method that takes a ajax task and a callback. Buffer expects the handler to deal with the ajax..
How can jQuery deferred be used? http://stackoverflow.com/questions/4869609/how-can-jquery-deferred-be-used class that calls AJAX request in order. Next one start after previous one finishes . Class Buffer methods append Constructor takes a function which will be the task handler to be called .append appends a task to the buffer. Buffer will only call..
http://stackoverflow.com/questions/5134208/jquery-oop-basics rendering your graphics into the DOM If you're not using the canvas for some reason . Live example Inheritance var Constructor function name this.name name Constructor.prototype.mymethod function alert my name is this.name var obj new Constructor.. If you're not using the canvas for some reason . Live example Inheritance var Constructor function name this.name name Constructor.prototype.mymethod function alert my name is this.name var obj new Constructor foo obj.mymethod my name is foo Here were.. function name this.name name Constructor.prototype.mymethod function alert my name is this.name var obj new Constructor foo obj.mymethod my name is foo Here were defining a Constructor function that you can call to create a new object. You..
Does 'this' refer to the element that called this function? http://stackoverflow.com/questions/5826467/does-this-refer-to-the-element-that-called-this-function a.b c the `this` will point to `window` As a function assigned to a variable var a function `this` is `window` a As a Constructor var C function `this` is `c` var c new C Note that if your forgot to instantiate with new JavaScript will assign those properties..
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