Menu
So I have some javascript class and in one method I use jQuery to bind function to click event. And within this function I need to call other methods of this class. In usual js function I did it through "this.method_name()", but here, I guess, jQuery redefines "this" pointer.
214
In jQuery, the class and ID selectors are the same as in CSS. If you want to select elements with a certain class, use a dot ( . ) and the class name. If you want to select elements with a certain ID, use the hash symbol ( # ) and the ID name.
In your functions add a parameter called e.g. element and replace $(this) with element . Calling the function you have to add the parameter $(this) . $(date_field). click(function() { clearFmt($(this), date_fmt); });
Calling a JavaScript library function is quite easy. You need to use the script tag. As almost everything we do when using jQuery reads or manipulates the document object model (DOM), we need to make sure that we start adding events etc. as soon as the DOM is ready.
In jQuery, the $ sign is just an alias to jQuery() , then an alias for a function. This page reports: Basic syntax is: $(selector).action() A dollar sign to define jQuery. A (selector) to "query (or find)" HTML elements.
jQuery doesn't redefine the this pointer, but that's how JavaScript functions work in general. Store a reference to the this pointer under a different name, and use that.
var self = this;
$("selector").click(function() {
self.method_name();
});
See this answer for more approaches.
99
There are a few different ways to do this.
Anurag has a perfect example of one.
Two other ways are the jQuery Proxy class (Mentioned in other answers) and the 'apply' function
Now lets create an object with click events:
var MyObj = function(){
this.property1 = "StringProp";
// jQuery Proxy Function
$(".selector").click($.proxy(function(){
//Will alert "StringProp"
alert(this.property1);
// set the 'this' object in the function to the MyObj instance
},this));
//Apply Function
//args are optional
this.clickFunction = function(arg1){
alert(this.property1);
};
$(".selector").click(this.clickFunction.apply(this,"this is optional"));
};
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
