/** * iPhone 4/4s landscape & portrait */@media only screenand (min-device-width: 320px)and (max-device-width: 480px)and (-webkit-device-pixel-ratio: 2)and (device-aspect-ratio: 2/3) {}/** * iPhone 4/4s portrait */@media only screenand (min-device-width: 320px)and (max-device-width: 480px)and (-webkit-device-pixel-ratio: 2)and (device-aspect-ratio: 2/3)and (orientation:portrait) {}/** * iPhone 4/4s landscape */@media only screenand (min-device-width: 320px)and (max-device-width: 480px)and (-webkit-device-pixel-ratio: 2)and (device-aspect-ratio: 2/3)and (orientation:landscape) {}/** * iPhone 5/5s landscape & portrait */@media only screenand (min-device-width: 320px)and (max-device-width: 568px)and (-webkit-min-device-pixel-ratio: 2) {}/** * iPhone 5/5s portrait */@media only screenand (min-device-width: 320px)and (max-device-width: 568px)and (-webkit-min-device-pixel-ratio: 2)and (orientation: portrait) {}/** * iPhone 5/5s landscape */@media only screenand (min-device-width: 320px)and (max-device-width: 568px)and (-webkit-min-device-pixel-ratio: 2)and (orientation: landscape) {}/** * iPhone 5/5s landscape & portrait */@media only screenand (min-device-width: 414px)and (max-device-width: 736px)and (-webkit-min-device-pixel-ratio: 3) {}/** * iPhone 5/5s portrait */@media only screenand (min-device-width: 414px)and (max-device-width: 736px)and (-webkit-min-device-pixel-ratio: 3)and (orientation: portrait) {}/** * iPhone 5/5s landscape */@media only screenand (min-device-width: 414px)and (max-device-width: 736px)and (-webkit-min-device-pixel-ratio: 3)and (orientation: landscape) {}@media only screen and (min-device-width: 375px) and (max-device-width: 667px) and (orientation : portrait) { //iPhone 6 Portrait}@media only screen and (min-device-width: 375px) and (max-device-width: 667px) and (orientation : landscape) { //iPhone 6 landscape}@media only screen and (min-device-width: 414px) and (max-device-width: 736px) and (orientation : portrait) { //iPhone 6+ Portrait}@media only screen and (min-device-width: 414px) and (max-device-width: 736px) and (orientation : landscape) { //iPhone 6+ landscape}@media only screen and (max-device-width: 640px), only screen and (max-device-width: 667px), only screen and (max-width: 480px){ //iPhone 6 and iPhone 6+ portrait and landscape}@media only screen and (max-device-width: 640px), only screen and (max-device-width: 667px), only screen and (max-width: 480px) and (orientation : portrait){ //iPhone 6 and iPhone 6+ portrait}@media only screen and (max-device-width: 640px), only screen and (max-device-width: 667px), only screen and (max-width: 480px) and (orientation : landscape){ //iPhone 6 and iPhone 6+ landscape}/** * Galaxy S3 landscape & portrait */@media screenand (device-width: 320px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 2) {}/** * Galaxy S3 portrait */@media screenand (device-width: 320px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 2)and (orientation: portrait) {}/** * Galaxy S3 landscape */@media screenand (device-width: 320px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 2)and (orientation: landscape) {}/** * Galaxy S4 landscape & portrait */@media screenand (device-width: 320px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3) {}/** * Galaxy S4 portrait */@media screenand (device-width: 320px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3)and (orientation: portrait) {}/** * Galaxy S4 landscape */@media screenand (device-width: 320px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3)and (orientation: landscape) {}/** * Galaxy S5 landscape & portrait */@media screenand (device-width: 360px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3) {}/** * Galaxy S4 portrait */@media screenand (device-width: 360px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3)and (orientation: portrait) {}/** * Galaxy S4 landscape */@media screenand (device-width: 360px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3)and (orientation: landscape) {}/** * HTC One landscape & portrait */@media screenand (device-width: 360px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3) {}/** * HTC One portrait */@media screenand (device-width: 360px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3)and (orientation: portrait) {}/** * HTC One landscape */@media screenand (device-width: 360px)and (device-height: 640px)and (-webkit-device-pixel-ratio: 3)and (orientation: landscape) {}/** * iPad Mini landscape & portrait */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (-webkit-min-device-pixel-ratio: 1) {}/** * iPad Mini portrait */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (orientation: portrait)and (-webkit-min-device-pixel-ratio: 1) {}/** * iPad Mini landscape */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (orientation: landscape)and (-webkit-min-device-pixel-ratio: 1) {}/** * iPad 1/2 landscape & portrait */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (-webkit-min-device-pixel-ratio: 1) {}/** * iPad 1/2 portrait */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (orientation: portrait)and (-webkit-min-device-pixel-ratio: 1) {}/** * iPad 1/2 landscape */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (orientation: landscape)and (-webkit-min-device-pixel-ratio: 1) {}/** * iPad 3/4 landscape & portrait */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (-webkit-min-device-pixel-ratio: 2) {}/** * iPad 3/4 portrait */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (orientation: portrait)and (-webkit-min-device-pixel-ratio: 2) {}/** * iPad 3/4 landscape */@media only screenand (min-device-width: 768px)and (max-device-width: 1024px)and (orientation: landscape)and (-webkit-min-device-pixel-ratio: 2) {}/** * Galaxy Tab 10.1 landscape & portrait */@media(min-device-width: 800px)and (max-device-width: 1280px) {}/** * Galaxy Tab 10.1 portrait */@media(max-device-width: 800px)and (orientation: portrait) {}/** * Galaxy Tab 10.1 landscape */@media(max-device-width: 1280px)and (orientation: landscape) {}/** * Asus Nexus 7 landscape & portrait */@media screenand (device-width: 601px)and (device-height: 906px)and (-webkit-min-device-pixel-ratio: 1.331)and (-webkit-max-device-pixel-ratio: 1.332) {}/** * Asus Nexus 7 portrait */@media screenand (device-width: 601px)and (device-height: 906px)and (-webkit-min-device-pixel-ratio: 1.331)and (-webkit-max-device-pixel-ratio: 1.332)and (orientation: portrait) {}/** * Asus Nexus 7 landscape */@media screenand (device-width: 601px)and (device-height: 906px)and (-webkit-min-device-pixel-ratio: 1.331)and (-webkit-max-device-pixel-ratio: 1.332)and (orientation: landscape) {}/** * Kindle Fire HD 7" landscape & portrait */@media only screenand (min-device-width: 800px)and (max-device-width: 1280px)and (-webkit-min-device-pixel-ratio: 1.5) {}/** * Kindle Fire HD 7" portrait */@media only screenand (min-device-width: 800px)and (max-device-width: 1280px)and (-webkit-min-device-pixel-ratio: 1.5)and (orientation: portrait) {}/** * Kindle Fire HD 7" landscape */@media only screenand (min-device-width: 800px)and (max-device-width: 1280px)and (-webkit-min-device-pixel-ratio: 1.5)and (orientation: landscape) {}/** * Kindle Fire HD 8.9" landscape & portrait */@media only screenand (min-device-width: 1200px)and (max-device-width: 1600px)and (-webkit-min-device-pixel-ratio: 1.5) {}/** * Kindle Fire HD 8.9" portrait */@media only screenand (min-device-width: 1200px)and (max-device-width: 1600px)and (-webkit-min-device-pixel-ratio: 1.5)and (orientation: portrait) {}/** * Kindle Fire HD 8.9" landscape */@media only screenand (min-device-width: 1200px)and (max-device-width: 1600px)and (-webkit-min-device-pixel-ratio: 1.5)and (orientation: landscape) {}/** * Non-Retina Screens */@media screenand (min-device-width: 1200px)and (max-device-width: 1600px)and (-webkit-min-device-pixel-ratio: 1) {}/** * Retina Screens */@media screenand (min-device-width: 1200px)and (max-device-width: 1600px)and (-webkit-min-device-pixel-ratio: 2)and (min-resolution: 192dpi) {}/** * Apple Watch */@media(max-device-width: 42mm)and (min-device-width: 38mm) {}/** * Moto 360 Watch */@media(max-device-width: 218px)and (max-device-height: 281px) {}

WebDevelovermentReliesonHtml,CSS和JavaScript:1)HTMLStructuresContent,2)CSSStyleSIT和3)JavaScriptAddSstractivity,形成thebasisofmodernWebemodernWebExexperiences。

HTML的作用是通过标签和属性定义网页的结构和内容。1.HTML通过到、等标签组织内容,使其易于阅读和理解。2.使用语义化标签如、等增强可访问性和SEO。3.优化HTML代码可以提高网页加载速度和用户体验。

htmlisaspecifictypefodyfocusedonstructuringwebcontent,而“代码” badlyLyCludEslanguagesLikeLikejavascriptandPytyPythonForFunctionality.1)htmldefineswebpagertuctureduseTags.2)“代码”代码“ code” code code code codeSpassSesseseseseseseseAwiderRangeLangeLangeforLageforLogageforLogicIctInterract

HTML、CSS和JavaScript是Web开发的三大支柱。1.HTML定义网页结构,使用标签如、等。2.CSS控制网页样式,使用选择器和属性如color、font-size等。3.JavaScript实现动态效果和交互,通过事件监听和DOM操作。

HTML定义网页结构,CSS负责样式和布局,JavaScript赋予动态交互。三者在网页开发中各司其职,共同构建丰富多彩的网站。

HTML适合初学者学习,因为它简单易学且能快速看到成果。1)HTML的学习曲线平缓,易于上手。2)只需掌握基本标签即可开始创建网页。3)灵活性高,可与CSS和JavaScript结合使用。4)丰富的学习资源和现代工具支持学习过程。

AnexampleOfAstartingTaginHtmlis,beginSaparagraph.startingTagSareEssentialInhtmlastheyInitiateEllements,defiteTheeTheErtypes,andarecrucialforsstructuringwebpages wepages webpages andConstructingthedom。

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