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  • Some tips for deep optimization to improve website access speed

    Some tips for deep optimization to improve website access speed

    The speed of website access can directly affect the traffic of the website, and the number of website visits is almost directly linked to the interests of the website. Therefore, the speed of the website has become a very concern for enterprises and webma
    2025-04-19
  • Some useful meta-setting methods (must-read)

    Some useful meta-setting methods (must-read)

    <meta name=viewport content=width=device-width, initial-scale=1.0, user-scalable=no><meta name=format-detection content=
    2025-04-19
  • node.js uses require() function to load module

    node.js uses require() function to load module

    The detailed instructions are written in the notes, so I won’t talk about them here. Please read them in detail by yourself. Don’t use the notes as air. Copy the code as follows:/*In node, you can use the require() function to load the module.* The requir
    2025-04-19
  • Security issues for HTML5 developers need to keep in mind

    Security issues for HTML5 developers need to keep in mind

    Comment: Application security issues in HTML5 should also be paid attention to, experts say that HTML5 has brought new security challenges to developers. The war of words between Apple and Adobe has brought many speculations about the fate of HTML 5. Alt
    2025-04-19
  • JavaScript string object substr method beginner example (used to intercept strings)

    JavaScript string object substr method beginner example (used to intercept strings)

    JavaScript substr method The substr method is used to intercept strings based on the start position and length and return to intercept part of the string. Its syntax is as follows: Copy the code code is as follows: str_object.substr(start, length) Paramet
    2025-04-19
  • One line of commands to complete the node.js version upgrade

    One line of commands to complete the node.js version upgrade

    Node has a module called n (this name can be short enough...), which is specially used to manage node.js versions. First install n module: npm install -gn Step 2: Isn't it very easy to upgrade node.js to the latest stable version n stable? ! The versi
    2025-04-19
  • html5 Canvas drawing tutorial (9)—Draw rectangles and circles in canvas

    html5 Canvas drawing tutorial (9)—Draw rectangles and circles in canvas

    Comment: This article will talk about the method of drawing rectangles and circles in canvas, they belong to basic graphics. Of course, there are more than them in basic graphics, but in canvas, only drawing rectangles and circles does not require other m
    2025-04-19
  • Recommend a packaged getElementsByClassName method

    Recommend a packaged getElementsByClassName method

    We know that the native JS provides us with the getElementsByClassName method, which can obtain a collection of nodes containing a specified class through this method. Note that it is a collection, that is, this function returns an array. However, IE does
    2025-04-19
  • JS determines whether the variable is empty or not, whether it is null

    JS determines whether the variable is empty or not, whether it is null

    /** * Determine whether null * @param data */ function isNull(data){ return (data == "" || data == undefined || data == null) "None":
    2025-04-19
  • js dynamically delete div elements using removeChild method

    js dynamically delete div elements using removeChild method

    When doing user searches, because the search results need to be loaded and displayed dynamically, those html elements must be dynamically generated by Ajax. When the user opens the search interface, there are users recommended by the system. When the user
    2025-04-19
  • HTML5 Tutorial: How to implement HTML5 offline application development

    HTML5 Tutorial: How to implement HTML5 offline application development

    Article introduction of Wulin.com (www.vevb.com): I won’t talk about the instructions for offline applications here. I need to ask Google or Baidu. This article aims to introduce how to implement offline application development of HTML5. I won’t talk abou
    2025-04-19
  • Intermediate HTML tutorial meta tags

    Intermediate HTML tutorial meta tags

    Once upon a time, when the Internet still used a small amount of thin paper, the meta tag was the Internet's street announcer... The meta tag did nothing to the content in the browser window, they were used in the information about the page like searc
    2025-04-19
  • XHTML Introduction Learning Tutorial: XHTML Tags

    XHTML Introduction Learning Tutorial: XHTML Tags

    Introduction to XHTML tags Maybe you have paid attention to in the previous section. The biggest difference between XHTML files and ordinary plain text files is that they are included with <>, such as<body> . We call them tags. Usually, XHTML tags a
    2025-04-19
  • Implement code based on HTML5 super cool camera (HTML5 webcam) photography function

    Implement code based on HTML5 super cool camera (HTML5 webcam) photography function

    Comment: The super cool camera (HTML5 webcam) camera function implemented based on HTML5. Friends who need to know can refer to WebRTC may be the most popular HTML5 standard next year. Mozilla has developed a set of APIs that help you control hardware, su
    2025-04-19
  • Method of calling parent page in iframe in js

    Method of calling parent page in iframe in js

    This article example describes the method of calling the parent page in js by iframe. Share it for your reference. The specific implementation method is as follows: The method of calling the parent page of the child page is easy to implement in js. We onl
    2025-04-19