flex佈局好好研究把,總是記不住,記性差了,為什麼
阿新 • • 發佈:2021-09-29
複製下面程式碼,直接執行
程式碼裡註釋過大,大家忍一忍
預覽效果如下
<!DOCTYPE html> <style> /*任何一個容器都可以指定為Flex佈局。 * .box{display:flex;} * 行內元素也可以使用Flex佈局 * .box{display:inline-flex;} * Webkit核心的瀏覽器,必須加上-webkit字首。 * .box{ * display:-webkit-flex; * display:flex; * } * 注意,設為Flex佈局以後,子元素的float,clear和vertical-align屬性失效。 * 採用 Flex 佈局的元素,稱為 Flex 容器(flex container),簡稱"容器"。它的 * 所有子元素自動成為容器成員,稱為 Flex 專案(flex item),簡稱"專案"。 * 容器的屬性 * flex-direction屬性決定主軸的方向(即專案的排列方向)。row | row-reverse | column | column-reverse; flex-wrap屬性預設情況下,專案都排在一條線(又稱"軸線")上。flex-wrap屬性定義,如果一條軸線排不下,如何換行。 nowrap | wrap | wrap-reverse; flex-flow屬性是flex-direction屬性和flex-wrap屬性的簡寫形式,預設值為row nowrap。<flex-direction> || <flex-wrap>; justify-content屬性定義了專案在主軸上的對齊方式。flex-start | flex-end | center | space-between | space-around; align-items屬性定義專案在交叉軸上如何對齊。flex-start | flex-end | center | baseline | stretch; align-content屬性定義了多根軸線的對齊方式。如果專案只有一根軸線,該屬性不起作用。flex-start | flex-end | center | space-between | space-around | stretch; * 專案的屬性 * order屬性定義專案的排列順序。數值越小,排列越靠前,預設為0。值為<integer>; flex-grow屬性定義專案的放大比例,預設為0,即如果存在剩餘空間,也不放大。如果所有專案的flex-grow屬性都為1,則它們將等分剩餘空間(如果有的話)。如果一個專案的flex-grow屬性為2,其他專案都為1,則前者佔據的剩餘空間將比其他項多一倍。值為<number> flex-shrink屬性定義了專案的縮小比例,預設為1,即如果空間不足,該專案將縮小。如果所有專案的flex-shrink屬性都為1,當空間不足時,都將等比例縮小。如果一個專案的flex-shrink屬性為0,其他專案都為1,則空間不足時,前者不縮小。負值對該屬性無效。值為<number> flex-basis屬性定義了在分配多餘空間之前,專案佔據的主軸空間(main size)。瀏覽器根據這個屬性,計算主軸是否有多餘空間。它的預設值為auto,即專案的本來大小。它可以設為跟width或height屬性一樣的值(比如350px),則專案將佔據固定空間。值為<length> flex屬性是flex-grow, flex-shrink 和 flex-basis的簡寫,預設值為0 1 auto。後兩個屬性可選。該屬性有兩個快捷值:auto (1 1 auto) 和 none (0 0 auto)。建議優先使用這個屬性,而不是單獨寫三個分離的屬性,因為瀏覽器會推算相關值。 align-self屬性允許單個專案有與其他專案不一樣的對齊方式,可覆蓋align-items屬性。預設值為auto,表示繼承父元素的align-items屬性,如果沒有父元素,則等同於stretch。auto | flex-start | flex-end | center | baseline | stretch; * * */ .first-face { display: flex; justify-content: center; align-items: center; } .second-face { display: flex; justify-content: space-between; } .second-face .pip:nth-of-type(2) { align-self: flex-end; } .third-face { display: flex; justify-content: space-between; } .third-face .pip:nth-of-type(2){ align-self: center; } .third-face .pip:nth-of-type(3) { align-self: flex-end; } .fourth-face,.sixth-face { display: flex; justify-content: space-between; } .fourth-face .column, .sixth-face .column{ display: flex; flex-direction: column; justify-content: space-between; } .fifth-face { display: flex; justify-content: space-between; } .fifth-face .column { display: flex; flex-direction: column; justify-content: space-between; } .fifth-face .column:nth-of-type(2){ justify-content: center; } . /*other*/ * { box-sizing: border-box; } html,body { height: 100%; } body { display: flex; align-items: center; justify-content: center; vertical-align: center; flex-wrap: wrap; align-content: center; font-family: "微軟雅黑"; background: linear-gradient(top,#222,#333); } [class$="face"] { margin: 16px; padding: 4px; background-color: #e7e7e7; width: 104px; height: 104px; object-fit: contain; box-shadow: inset 0 5px white, inset 0 5px #bbb, inset 0 5px #d7d7d7, inset 0 -5px #d7d7d7; border-radius: 10%; } .pip { display: block; width: 24px; height: 24px; border-radius: 50%;/*圓角*/ margin: 4px;/*整體偏移*/ background-color: #333;/*背景顏色*/ box-shadow: inset 0 3px #111,inset 0 -3px #555;/*陰影*/ } </style> <html> <head> <meta charset="UTF-8" /> <title>Hello React!</title> <link rel="stylesheet" type="text/css" href="css/firstCSS.css" /> </head> <body> <div class="first-face"> <span class="pip"></span> </div> <div class="second-face"> <span class="pip"></span> <span class="pip"></span> </div> <div class="third-face"> <span class="pip"></span> <span class="pip"></span> <span class="pip"></span> </div> <div class="fourth-face"> <div class="column"> <span class="pip"></span> <span class="pip"></span> </div> <div class="column"> <span class="pip"></span> <span class="pip"></span> </div> </div> <div class="fifth-face"> <div class="column"> <span class="pip"></span> <span class="pip"></span> </div> <div class="column"> <span class="pip"></span> </div> <div class="column"> <span class="pip"></span> <span class="pip"></span> </div> </div> <div class="sixth-face"> <div class="column"> <span class="pip"></span> <span class="pip"></span> <span class="pip"></span> </div> <div class="column"> <span class="pip"></span> <span class="pip"></span> <span class="pip"></span> </div> </div> <div class="sixth-face"> <div class="column"> <span class="pip"></span> <span class="pip"></span> <span class="pip"></span> </div> <div class="column"> <span class="pip"></span> <span class="pip"></span> <span class="pip"></span> </div> <div class="column"> <span class="pip"></span> <span class="pip"></span> <span class="pip"></span> </div> </div> </body> </html>