Dom-independent jquery utility functions

Utility function: Defines a function that does not manipulate the wrapper set under the Jquery/$ namespace, and can be seen as a top-level function defined on an instance rather than a window instance. In general, these utility functions either manipulate objects other than DOM elements, or perform some object-independent operations.

jquery flags for public use:

$.fx.off: Enable or disable effects, do not remove the effects that have been used on the page, just disable the animation effects.

$.support: Details of supported features

$.browser: Public Browser details,jQuery starting with version 1.9, removed $.browser and $.browser.version, replaced by $.support.

$.noconflict (Jquerttoo): Returns the control of $ to another library, invokes the functionality of jquery using the jquery identifier, and discards the $ and jquery identifiers if the parameter is set to True.

Manipulating JavaScript objects and collections

$.trim (value): Removes whitespace characters from the beginning and end of the passed-in string (matches \s characters, also including page breaks, line feeds, carriage returns, tabs, vertical tabs, and \u00a0), returning the modified result

$.each (Container, callback): Iterates through each entry of the incoming container and invokes the callback function

$.grep (Array, callback, invert): Filter array, callback function returns True if the current value is collected to a new array unless invert is set to True (returns false is collected)

$.map (Array, callback): invokes the callback function for each item of the array, collecting the return value of the function call into the new array

$.inarray (value, array): Returns the subscript of the first occurrence of an incoming value

$.makearray (object): Converts an array-like object to an arrays (NodeList arguements)

$.unique (Array): Returns an array of elements that are not duplicates in the original array

$.merge (Array1, array2): Merges the value of the second array into the first array

$.extend (deep, Target, source1, ...)

$.param (params, Traditional): Serializes the incoming information into the query string when the request is submitted, and each name and value of the string is URI-encoded.

Test object

$.isarray $.isemptyobject $.isfunction $.isplainobject $.isxmldoc (node)

Test containment Relationship

$.contains (Container, Containee): detects whether the previous element is contained within the next element in the Doom hierarchy

Attaching data to an element

$.data (element, name, value): Stores or examines data in the passed-in element with the specified name

$.removedata (element, name): delete data on an element

Pre-bound function context

Jquery.proxy (function, context): Accepts a function and then returns a new function, and the new function always maintains a specific context. The most common use is to bind the object's method to the processor, and the object that owns the method as the function context of the processor.

Function: Functions that will change the context context.

Context: A function's contextual context (' this ') is set to this object.

Jquery.proxy (context, name)

Context: A function's contextual context is set to this object.

Name: The function name that will change the context context (this function must be the property of the previous parameter ' context ' object)

Parsing JSON

$.parsejson (JSON): Parses an incoming JSON string and returns its computed value

Evaluation of an expression

$.globaleval (Code): evaluates incoming JavaScript code in a global context

Dynamic load Scripts

GetScript (URL, callback): Initiates a GET request to the specified server gets the script specified by the URL, and (optionally) a callback function after successful invocation

Dom-independent jquery utility functions