Backdrop-filter is used to apply visual effects to the content behind the elements. 1. Use backdrop-filter:blur(10px) and other syntax to achieve the frosted glass effect; 2. Supports multiple filter functions such as blur, brightness, contrast, etc. and can be superimposed; 3. It is often used in glass card design, and it is necessary to ensure that the elements overlap with the background; 4. Modern browsers have good support, and @supports can be used to provide downgrade solutions; 5. Avoid excessive blur values and frequent redrawing to optimize performance. This attribute only takes effect when there is content behind the elements.

UseGuzzleforrobustHTTPrequestswithheadersandtimeouts.2.ParseHTMLefficientlywithSymfonyDomCrawlerusingCSSselectors.3.HandleJavaScript-heavysitesbyintegratingPuppeteerviaPHPexec()torenderpages.4.Respectrobots.txt,adddelays,rotateuseragents,anduseproxie

Define@keyframesbouncewith0%,100%attranslateY(0)and50%attranslateY(-20px)tocreateabasicbounce.2.Applytheanimationtoanelementusinganimation:bounce0.6sease-in-outinfiniteforsmooth,continuousmotion.3.Forrealism,use@keyframesrealistic-bouncewithscale(1.1

Usetheelementwithinatagtocreateasemanticsearchfield.2.Includeaforaccessibility,settheform'sactionandmethod="get"attributestosenddatatoasearchendpointwithashareableURL.3.Addname="q"todefinethequeryparameter,useplaceholdertoguideuse

rel="stylesheet"linksCSSfilesforstylingthepage;2.rel="preload"hintstopreloadcriticalresourcesforperformance;3.rel="icon"setsthewebsite’sfavicon;4.rel="alternate"providesalternateversionslikeRSSorprint;5.rel=&qu

ThetargetattributeinanHTMLanchortagspecifieswheretoopenthelinkeddocument.1._selfopensthelinkinthesametab(default).2._blankopensthelinkinanewtaborwindow.3._parentopensthelinkintheparentframe.4._topopensthelinkinthefullwindowbody,removingframes.Forexte

Use elements and set the action and method attributes to specify the data submission address and method; 2. Add input fields with name attribute to ensure that the data can be recognized by the server; 3. Use or create a submission button, and after clicking, the browser will send the form data to the specified URL, which will be processed by the backend to complete the data submission.

Using tags is the easiest and recommended method. The syntax is suitable for modern browsers to embed PDF directly; 2. Using tags can provide better control and backup content support, syntax is, and provides download links in tags as backup solutions when they are not supported; 3. It can be embedded through Google DocsViewer, but it is not recommended to use widely due to privacy and performance issues; 4. In order to improve the user experience, appropriate heights should be set, responsive sizes (such as height: 80vh) and PDF download links should be provided so that users can download and view them themselves.