CSS (Cascading Style Sheets) is a language used to control the style of web pages. It can set the font, color, border, layout and other properties of the web page. When developing a web page, setting CSS properties is a crucial step. This article will introduce in detail how to set CSS properties, as well as commonly used property values and methods.
1. How to set CSS properties
- Inline style: Add the style attribute to the HTML tag to set the CSS properties. For example:
<p style="color: red; font-size: 16px;">Hello, world!</p>
- Internal style sheet: add the style tag in the HTML head, and then set the CSS properties in it. For example:
<head>
<style>
p {
color: red;
font-size: 16px;
}
</style>
</head>
<body>
<p>Hello, world!</p>
</body>- External style sheet: Put the CSS code in a separate style sheet file, and then reference it in HTML through the link tag. For example:
<head> <link rel="stylesheet" href="style.css"> </head> <body> <p>Hello, world!</p> </body>
2. Commonly used CSS attributes and their attribute values
- Font attribute (font)
- ##font- family: Set the name of the font, which can be the name of a specific font (such as "Helvetica") or a general font (such as "serif", "sans-serif", "monospace", etc.).
- font-size: Set the font size in units such as pixels (px), percentage (%), em (multiples of the current font size as the basis), etc.
- font-style: Set the font style, which can be "normal" (normal), "italic" (italic) or "oblique" (oblique).
- font-weight: Set the weight of the font, which can be a number (such as 400) or a keyword (such as "normal", "bold").
- Color attribute (color)
- color: Set the color of the text, you can use the color name (such as "red", "green", "blue", etc.) or RGB values, RGBA values (such as "rgb(255, 0, 0)", "rgba(255, 0, 0, 0.5)"), etc.
- Background attribute (background)
- background-color: Set the background color of the element, you can use the color name or RGB value, RGBA value, etc. Way.
- background-image: Set the background image of the element, you can use a local image or a remote image address.
- background-repeat: Set the repeat mode of the background image, which can be "repeat" (repeat), "repeat-x" (repeat horizontally), "repeat-y" (repeat vertically) or "no-repeat" "(Not repeating).
- background-position: Set the position of the background image, you can use keywords (such as "left top", "center", "right bottom") or pixel values, percentage values, etc.
- Border attribute (border)
- border-width: Set the width of the border, you can use units such as pixels and em.
- border-style: Set the border style, which can be "solid" (solid line), "dotted" (dotted line), "dashed" (dashed line), etc.
- border-color: Set the color of the border, you can use color name or RGB value, RGBA value, etc.
- Size attributes (width, height)
- width: Set the width of the element, you can use units such as pixels and percentages.
- height: Set the height of the element in units such as pixels and percentages.
- Text attribute (text)
- text-align: Set the horizontal alignment of the text, which can be "left" (left-aligned), "right" (right-aligned), "center" (center-aligned), etc.
- text-decoration: Set the decoration effect of the text, which can be "none" (no decoration), "underline" (underline), "line-through" (strikethrough), etc.
- text-transform: Set the case conversion method of text, which can be "uppercase" (uppercase), "lowercase" (lowercase), "capitalize" (first letter capitalized), etc.
- Box attribute (box)
- margin: Set the margin of the element (the distance between the element and other elements), you can use pixels , percentage and other units.
- padding: Set the inner margin of the element (the distance between the content of the element and the border), which can be in pixels, percentages and other units.
- display: Set the display mode of the element, which can be "block" (block-level element), "inline" (inline element) or "inline-block" (inline block-level element), etc.
The above is the detailed content of Set css properties. For more information, please follow other related articles on the PHP Chinese website!
What are the limitations of React?May 02, 2025 am 12:26 AMReact'slimitationsinclude:1)asteeplearningcurveduetoitsvastecosystem,2)SEOchallengeswithclient-siderendering,3)potentialperformanceissuesinlargeapplications,4)complexstatemanagementasappsgrow,and5)theneedtokeepupwithitsrapidevolution.Thesefactorsshou
React's Learning Curve: Challenges for New DevelopersMay 02, 2025 am 12:24 AMReactischallengingforbeginnersduetoitssteeplearningcurveandparadigmshifttocomponent-basedarchitecture.1)Startwithofficialdocumentationforasolidfoundation.2)UnderstandJSXandhowtoembedJavaScriptwithinit.3)Learntousefunctionalcomponentswithhooksforstate
Generating Stable and Unique Keys for Dynamic Lists in ReactMay 02, 2025 am 12:22 AMThecorechallengeingeneratingstableanduniquekeysfordynamiclistsinReactisensuringconsistentidentifiersacrossre-rendersforefficientDOMupdates.1)Usenaturalkeyswhenpossible,astheyarereliableifuniqueandstable.2)Generatesynthetickeysbasedonmultipleattribute
JavaScript Fatigue: Staying Current with React and Its ToolsMay 02, 2025 am 12:19 AMJavaScriptfatigueinReactismanageablewithstrategieslikejust-in-timelearningandcuratedinformationsources.1)Learnwhatyouneedwhenyouneedit,focusingonprojectrelevance.2)FollowkeyblogsliketheofficialReactblogandengagewithcommunitieslikeReactifluxonDiscordt
Testing Components That Use the useState() HookMay 02, 2025 am 12:13 AMTotestReactcomponentsusingtheuseStatehook,useJestandReactTestingLibrarytosimulateinteractionsandverifystatechangesintheUI.1)Renderthecomponentandcheckinitialstate.2)Simulateuserinteractionslikeclicksorformsubmissions.3)Verifytheupdatedstatereflectsin
Keys in React: A Deep Dive into Performance Optimization TechniquesMay 01, 2025 am 12:25 AMKeysinReactarecrucialforoptimizingperformancebyaidinginefficientlistupdates.1)Usekeystoidentifyandtracklistelements.2)Avoidusingarrayindicesaskeystopreventperformanceissues.3)Choosestableidentifierslikeitem.idtomaintaincomponentstateandimproveperform
What are keys in React?May 01, 2025 am 12:25 AMReactkeysareuniqueidentifiersusedwhenrenderingliststoimprovereconciliationefficiency.1)TheyhelpReacttrackchangesinlistitems,2)usingstableanduniqueidentifierslikeitemIDsisrecommended,3)avoidusingarrayindicesaskeystopreventissueswithreordering,and4)ens
The Importance of Unique Keys in React: Avoiding Common PitfallsMay 01, 2025 am 12:19 AMUniquekeysarecrucialinReactforoptimizingrenderingandmaintainingcomponentstateintegrity.1)Useanaturaluniqueidentifierfromyourdataifavailable.2)Ifnonaturalidentifierexists,generateauniquekeyusingalibrarylikeuuid.3)Avoidusingarrayindicesaskeys,especiall
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
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
SublimeText3 Mac version
God-level code editing software (SublimeText3)
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
Notepad++7.3.1
Easy-to-use and free code editor
WebStorm Mac version
Useful JavaScript development tools
