Detailed explanation of jQuery.isPlainObject() function usage

jQuery.isPlainObject() function is used to determine whether the specified parameter is a pure object.

The so-called "pure object" means that the object is created through "{}" or "new Object".

This function belongs to the global jQuery object.

Syntax

jQuery 1.4 Newly addedThe static function.

jQuery.isPlainObject( object )

Parameters

Parameters

Description

object Any type needs to be Arbitrary value to judge.

Note: Host objects (or other objects used by the browser host environment to complete the ECMAScript execution environment) are difficult to perform cross-platform feature detection. Therefore, $.isPlainObject() may give different results on different browsers for instances of these objects.

Return value

jQuery.isPlainObject()The return value of the function is of Boolean type. If the specified parameter is a pure object, it returns true, otherwise it returns false.

Example & Description

The jQuery sample code for the jQuery.isPlainObject() function is as follows:

//在当前页面内追加换行标签和指定的HTML内容
function w( html ){
    document.body.innerHTML += "<br/>" + html;
}
w( $.isPlainObject( { } ) ); // true
w( $.isPlainObject( new Object() ) ); // true
w( $.isPlainObject( { name: "CodePlayer"} ) ); // true
w( $.isPlainObject( { sayHi: function(){} } ) ); // true
w( $.isPlainObject( "CodePlayer" ) ); // false
w( $.isPlainObject( true ) ); // false
w( $.isPlainObject( 12 ) ); // false
w( $.isPlainObject( [ ] ) ); // false
w( $.isPlainObject( function(){ } ) ); // false
w( $.isPlainObject( document.location ) ); // false(在IE中返回true)
function Person(){
    this.name = "张三";
}
w( $.isPlainObject( new Person() ) ); // false

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