登录信息保存应该怎样做?该怎么处理
登录信息保存应该怎样做??
一个主页上有3个嵌套页面(
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How do I crop an IFrame in HTML?
Aug 29, 2023 pm 04:33 PM
Inline frames are called iframes in HTML. A label specifies a rectangular area within the content where the browser can display different documents with scroll bars and borders. To embed another document within the current HTML document, use inline frames. A reference to an element can be specified using the HTMLiframe name attribute. In JavaScript, references to elements are also made using the name attribute. An iframe is essentially used to display a web page within the currently displayed web page. The URL of the document containing the iframe is specified using the "src" attribute. Syntax The following is the syntax of HTML <iframesrc="URL"title="d
Why does iframe load slowly?
Aug 24, 2023 pm 05:51 PM
The reasons for slow loading of iframes mainly include network delay, long resource loading time, loading order, caching mechanism and security policy. Detailed introduction: 1. Network delay. When the browser loads a web page containing an iframe, it needs to send a request to the server to obtain the content in the iframe. If the network delay is high, the time to obtain the content will increase, resulting in slow loading of the iframe. ; 2. When the resource loading time is long, the size of the resource is large or the server response time is long, the loading speed will be more obviously slower; 3. Loading sequence, etc.
What does data-id in iframe mean?
Aug 28, 2023 pm 02:25 PM
The data-id in an iframe refers to a custom attribute used in HTML tags to store the identifier of a specific element. By using the data-id attribute, you can add a unique identifier to the iframe element so that it can be manipulated and accessed in JavaScript. The naming of the data-id attribute can be customized according to specific needs, but some naming conventions are usually followed to ensure its uniqueness and readability. The data-id attribute can also be used to identify and manipulate a specific iframe.
How to solve session failure
Oct 18, 2023 pm 05:19 PM
Session failure is usually caused by the session lifetime expiration or server shutdown. The solutions: 1. Extend the lifetime of the session; 2. Use persistent storage; 3. Use cookies; 4. Update the session asynchronously; 5. Use session management middleware.
What are the loading events of iframe?
Aug 28, 2023 pm 01:55 PM
The loading events of iframe include onload event, onreadystatechange event, onbeforeunload event, onerror event, onabort event, etc. Detailed description: 1. onload event, specifying the JavaScript code to be executed after loading the iframe; 2. onreadystatechange event, specifying the JavaScript code to be executed when the iframe state changes, etc.
Solution to PHP Session cross-domain problem
Oct 12, 2023 pm 03:00 PM
Solution to the cross-domain problem of PHPSession In the development of front-end and back-end separation, cross-domain requests have become the norm. When dealing with cross-domain issues, we usually involve the use and management of sessions. However, due to browser origin policy restrictions, sessions cannot be shared by default across domains. In order to solve this problem, we need to use some techniques and methods to achieve cross-domain sharing of sessions. 1. The most common use of cookies to share sessions across domains
What's the danger in iframes
Sep 08, 2023 pm 03:14 PM
The dangers in iframes mainly include: 1. Security vulnerabilities. Malicious web pages can load other web pages through iframes and carry out some attacks; 2. Same-origin policy breakthrough. By loading web pages under other domain names in iframes, the same-origin policy can be breached. strategy to achieve cross-domain communication, which may be maliciously attacked; 3. Code execution issues, web pages loaded in iframes can execute JS code, which may cause some security issues; 4. SEO issues, search engines may not be able to correctly parse and Index content loaded via iframe and more.
What are the differences between JavaScript and PHP cookies?
Sep 02, 2023 pm 12:29 PM
JavaScriptCookies Using JavaScript cookies is the most effective way to remember and track preferences, purchases, commissions and other information. Information needed for a better visitor experience or website statistics. PHPCookieCookies are text files that are stored on client computers and retained for tracking purposes. PHP transparently supports HTTP cookies. How do JavaScript cookies work? Your server sends some data to your visitor's browser in the form of a cookie. Browsers can accept cookies. If present, it will be stored on the visitor's hard drive as a plain text record. Now, when a visitor reaches another page on the site
