nodelist

The namedItem method must be mentioned for HTMLCollection objects. Before you begin reading this article, I strongly recommend that you read this article: http://w3help.org/zh-cn/causes/SD9004. HTMLCollection Interface Definition

Yesterday saw a queryselectorall () thing, found that the use of similar to the Getelementsby series, they want to delve into the differences between them, the following is the information found. PS: The reason to understand this knowledge point Two

Transferred from: http://www.jb51.net/article/24182.htmvar anchors = document.getElementsByTagName ("a"); for (i = 0; i ) {var ele=anchors[i]; // take an element // some code hereThe above code means getting all the link elements in the document

Like what: Copy Code code as follows: var anchors = document.getElementsByTagName ("a"); for (i = 0; i var ele=anchors[i];//takes an element Some code here } The above code represents getting all the link elements in

In front-end web programming, we usually use the document. getelementsbytagname method to retrieve a group of DOM elements with the same tag, such: VaR anchors = Document. getelementsbytagname ("");For (I = 0; I VaR ele = anchors [I]; // obtain an

For example: CopyCode The Code is as follows: var anchors = Document. getelementsbytagname (""); For (I = 0; I VaR ele = anchors [I]; // obtain an element // Some code here } The code above indicates getting all the link elements in the document,

In a recent reading of JavaScript advanced programming, I saw the phrase: "Understanding nodelist and Htmlcollection is the key to a thorough understanding of the DOM in general." , so I think we should write a blog about nodelist and htmlcollection

In Web Front-end programming, we usually use the document. getElementsByTagName method to retrieve a group of dom elements with the same tag. For example: The Code is as follows: Var anchors = document. getElementsByTagName ("");For (I = 0; I Var

In the console typeof NodeList The result of the execution is: function, and the results are entered in the console nodelist, the effect is as follows: found that in addition to function inside nothing, so directly new nodelist, the effect is as

First look at what is nodelist,nodelist and arguments are not normal arrays, they have some basic properties of the array but not exactly an array. Here is the definition found on Mozilla: This is a commonly used type which be a collection of nodes

In Web front-end programming, we usually take a document.getelementsbytagname approach to get a set of DOM elements of the same label, such as: var list = document.getElementsByTagName ("li"); for (i = 0; i First, this group of DOM elements

querySelector()。 This method can be called by the Document or element type.When a method is called with the document type, a matching element is found within the scope of the querySelector() documentation element, and when the method is called with

Node objects are a single node, but sometimes a data structure is required to accommodate multiple nodes. The DOM provides two interfaces for deploying a collection of such nodes, namely NodeList and htmlcollection Definition on MDN:

When getting native DOM elements, it mainly involves these Dom APIs (linked to living standard): Nodeand corresponding setsNodeList Element(Inheritance Node ) and corresponding setsHTMLCollection Document(Inherited Node ) Note:

Main API that involves getting elementsWhen getting native DOM elements, it mainly involves these Dom APIs (linked to living standard): Nodeand corresponding setsNodeList Element(Inheritance Node ) and corresponding setsHTMLCollection

NodeListThe NodeList instance object is a class array object whose members are node objects, including the ChildNodes and Queryselectorall () method return valuesA dynamic collection is a change in the DOM structure that can be automatically

nodelist Each node has a ChildNodes property that holds the NodeList object. NodeList is a class array object that holds an ordered set of nodes that can be accessed by location. The uniqueness of the NodeList object is that it is actually the

function Getdatatype (any){/* (1) Object.prototype.toString.call method judgment type:Pros: Generic, returns the type of "[Object String]" specific objectDisadvantage: Cannot return an inherited type (2) typeof XDisadvantage: The object type can not

In JS, through document.getElementsByTagName ("tag"), get a NodeList object, for this NodeList object we can use subscript way to access, It is easy to use the NodeList object as an array or in an array to be used as an NodeList object, and then

The book says: Each node has a ChildNodes property that holds the NodeList object. NodeList is an "object of class array". NodeList is a living, breathing object. Rather than a snapshot of an instant at the time of our first visit.  nodelist