Home Web Front-end JS Tutorial Method code of javascript reference object_javascript skills

Method code of javascript reference object_javascript skills

May 16, 2016 pm 07:10 PM

Reference methods within the same page:

1. Use id:

link1.href

2. Use name:

document.all.link1. href

3. Use sourceIndex:

document.all(4).href //Note that there are HTML, HEAD, TITLE and BODY in front, so it is 4

4. Use link collections:

document.anchors(0).href //All collections include all, anchors, applets, areas, attributes, behaviorUrns, bookmarks, boundElements, cells, childNodes, children, controlRange, elements, embeds, filters, forms, frames, images, imports, links, mimeTypes, options, plugins, rows, rules, scripts, styleSheets, tBodies, TextRectangle, please refer to MSDN introduction. In fact, Method 3 and Method 4 are the same collections, except that one is all, which can include all tags on the page, while anchors only include links.

5. getElementById:

document.getElementById("link1").href

6. getElementsByName:

document.getElementsByName("link1") [0].href //This is also a collection, a collection of all tags whose name is equal to the parameters of this method

7. getElementsByTagName:

document.getElementsByTagName("A")[ 0].href //This is also a set, which is a set of all tags whose tag names are equal to the parameters of the method

8. tags set:

document.all.tags("A ")[0].href //Same as method 7, obtain a collection by tag name

In addition, event.scrElement can get a reference to the tag at the trigger time; document.elementFromPoint(x,y ) can get a reference to the element at the x and y coordinates; document.body.componentFromPoint(event.clientX, event.clientY) can get a reference to the element where the mouse is; it can also be referenced through the parent-child node and sibling node relationships of the element. For example, nextSibling (the node after the current node), previousSibling (the node before the current node), childNodes, children, firstChild, lastChild, parentElement, etc. are all references to parent-child nodes and sibling nodes; it is not limited to this.

The above are common reference methods within the same page, and also involve

============= in different pages
For framing For pages, you can use parent.frames("frame name") and top.frames("frame name") to reference different frames. The subsequent references are the same as those on the same page. Multiple parents are also supported.
For example:
parent.frames("frame1").document.all.link1
top.frames("frame1").document.all.link1

====== ========
For the window opened by window.open(), you can use var newwin=window.open(), and then use newwin to reference the new window. The subsequent references are the same as those in the same page. ;The new window can use window.opener to refer to the window that opened it, which can be abbreviated as opener, for example:
var newwin=window.open()
Parent window (here is the window using the window.open() method ):
newwin.document.all.link1 //The parent window sentence can refer to the object in the new window
Child window (the window opened by the window.open() method):
opener.document.all .link1 //The child window can refer to the object of the parent window

Multiple openers are also supported, for example: opener.opener.document.all.link1


There are many methods , sometimes it needs to be determined according to the specific situation and can be used flexibly.

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What should I do if I encounter garbled code printing for front-end thermal paper receipts? What should I do if I encounter garbled code printing for front-end thermal paper receipts? Apr 04, 2025 pm 02:42 PM

Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...

Who gets paid more Python or JavaScript? Who gets paid more Python or JavaScript? Apr 04, 2025 am 12:09 AM

There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.

Demystifying JavaScript: What It Does and Why It Matters Demystifying JavaScript: What It Does and Why It Matters Apr 09, 2025 am 12:07 AM

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

How to merge array elements with the same ID into one object using JavaScript? How to merge array elements with the same ID into one object using JavaScript? Apr 04, 2025 pm 05:09 PM

How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...

How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? How to achieve parallax scrolling and element animation effects, like Shiseido's official website? or: How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? Apr 04, 2025 pm 05:36 PM

Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...

Is JavaScript hard to learn? Is JavaScript hard to learn? Apr 03, 2025 am 12:20 AM

Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.

The difference in console.log output result: Why are the two calls different? The difference in console.log output result: Why are the two calls different? Apr 04, 2025 pm 05:12 PM

In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...

How to implement panel drag and drop adjustment function similar to VSCode in front-end development? How to implement panel drag and drop adjustment function similar to VSCode in front-end development? Apr 04, 2025 pm 02:06 PM

Explore the implementation of panel drag and drop adjustment function similar to VSCode in the front-end. In front-end development, how to implement VSCode similar to VSCode...

See all articles