In CSS, vw is a window unit and a relative unit, which means a percentage of the window width; vw is relative to the width of the window, and the window is the visible area of the client browser. The window is divided into 100 units, and the size of 1vw is one percent of the width of the window.
The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.
What is vw in css
CSS unit is a unit of measurement, including size units and color units. We often use facing units to avoid confusing the layout of the web page in different views.
vw is the abbreviation of Viewport's width. 1vw is always equal to one percent of the current viewport width. vw is a window unit and a relative unit. The viewport is divided into 100 units of vw relative to its width.
The advantage of vw is that it can directly obtain the width, but using % cannot correctly obtain the width of the visual area without setting the body width, so this is a good advantage.
The viewport here refers to the visible area of the browser, as shown below:
Sample code:
h1{font-size:8vw;}If the view The width of the mouth is 200mm, then the font size of the h1 element in the above code will be 16mm, that is (8x200)/100
The example is as follows:
<html>
<style>
.p1{font-size:5vw;}
.p2{font-size:5px;}
</style>
</head>
<body>
<p class="p1">相对于viewport宽度大小的文字</p>
<p class="p2">px宽度大小的文字</p>
</body>
</html>Output result:
(Learning video sharing: css video tutorial)
The above is the detailed content of What is vw in css. For more information, please follow other related articles on the PHP Chinese website!
Understanding useState(): A Comprehensive Guide to React State ManagementApr 25, 2025 am 12:21 AMuseState()isaReacthookusedtomanagestateinfunctionalcomponents.1)Itinitializesandupdatesstate,2)shouldbecalledatthetoplevelofcomponents,3)canleadto'stalestate'ifnotusedcorrectly,and4)performancecanbeoptimizedusinguseCallbackandproperstateupdates.
What are the advantages of using React?Apr 25, 2025 am 12:16 AMReactispopularduetoitscomponent-basedarchitecture,VirtualDOM,richecosystem,anddeclarativenature.1)Component-basedarchitectureallowsforreusableUIpieces,improvingmodularityandmaintainability.2)TheVirtualDOMenhancesperformancebyefficientlyupdatingtheUI.
Debugging in React: Identifying and Resolving Common IssuesApr 25, 2025 am 12:09 AMTodebugReactapplicationseffectively,usethesestrategies:1)AddresspropdrillingwithContextAPIorRedux.2)HandleasynchronousoperationswithuseStateanduseEffect,usingAbortControllertopreventraceconditions.3)OptimizeperformancewithuseMemoanduseCallbacktoavoid
What is useState() in React?Apr 25, 2025 am 12:08 AMuseState()inReactallowsstatemanagementinfunctionalcomponents.1)Itsimplifiesstatemanagement,makingcodemoreconcise.2)UsetheprevCountfunctiontoupdatestatebasedonitspreviousvalue,avoidingstalestateissues.3)UseuseMemooruseCallbackforperformanceoptimizatio
useState() vs. useReducer(): Choosing the Right Hook for Your State NeedsApr 24, 2025 pm 05:13 PMChooseuseState()forsimple,independentstatevariables;useuseReducer()forcomplexstatelogicorwhenstatedependsonpreviousstate.1)useState()isidealforsimpleupdatesliketogglingabooleanorupdatingacounter.2)useReducer()isbetterformanagingmultiplesub-valuesorac
Managing State with useState(): A Practical TutorialApr 24, 2025 pm 05:05 PMuseState is superior to class components and other state management solutions because it simplifies state management, makes the code clearer, more readable, and is consistent with React's declarative nature. 1) useState allows the state variable to be declared directly in the function component, 2) it remembers the state during re-rendering through the hook mechanism, 3) use useState to utilize React optimizations such as memorization to improve performance, 4) But it should be noted that it can only be called on the top level of the component or in custom hooks, avoiding use in loops, conditions or nested functions.
When to Use useState() and When to Consider Alternative State Management SolutionsApr 24, 2025 pm 04:49 PMUseuseState()forlocalcomponentstatemanagement;consideralternativesforglobalstate,complexlogic,orperformanceissues.1)useState()isidealforsimple,localstate.2)UseglobalstatesolutionslikeReduxorContextforsharedstate.3)OptforReduxToolkitorMobXforcomplexst
React's Reusable Components: Enhancing Code Maintainability and EfficiencyApr 24, 2025 pm 04:45 PMReusablecomponentsinReactenhancecodemaintainabilityandefficiencybyallowingdeveloperstousethesamecomponentacrossdifferentpartsofanapplicationorprojects.1)Theyreduceredundancyandsimplifyupdates.2)Theyensureconsistencyinuserexperience.3)Theyrequireoptim
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
Dreamweaver CS6
Visual web development tools
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
SublimeText3 Linux new version
SublimeText3 Linux latest version
SublimeText3 Mac version
God-level code editing software (SublimeText3)
