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Pagination script do not understand, need a detailed explanation on each line. Appreciated!

in Getting Started • 10 years ago

Hello, everyone, I am struggling to understand what this piece of code mean, could any one help me explain its process in detail? I read through it and think its some type of data implimentation script.

Btw, its in the core script file for simplepagination jquery script.

Thank you all!

$.fn.pagination = function(method) {
// Method calling logic
if (methods[method] && method.charAt(0) != '_') {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else if (typeof method === 'object' || !method) {
return methods.init.apply(this, arguments);
} else {
$.error('Method ' + method + ' does not exist on jQuery.pagination');
}
};

Replies(1)

kbwood.au

Re: Pagination script do not understand, need a detailed explanation on each line. Appreciated!

10 years ago

This code deals with the variety of parameters that may be passed to a call to pagination.

Line 5 tests to see whether the first parameter to the call is a string that doesn't start with an underscore (_) and is the name of a function in the internal methods object. If so, that method is invoked and passed the rest of the arguments to the pagination call. Thus it would handle method calls like:

$(selector).pagination('enable');
$(selector).pagination('option', 'name', value);

Line 7 tests for the first parameter being an object or absent altogether. If so, the internal init function is invoked and the parameters are passed through. This handles the initialisation of the plugin for a selection:

$(selector).pagination();
$(selector).pagination({option1: value1, option2: value2});

Line 9 handles the conditions not covered by the above two tests and raises an error.

To enable the pagination calls to be chained, it should return a reference to this (the current jQuery collection), but perhaps that is what init and the other internal functions already do.

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Pagination script do not understand, need a detailed explanation on each line. Appreciated!

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Re: Pagination script do not understand, need a detailed explanation on each line. Appreciated!

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