button樣式篇一（ant Design React）

這篇來介紹button中elementUi、iview、ant中樣式結構

ant Design react

ant-react中button分兩個檔案less:

• mixins.less：根據button功能樣式不同封裝成函數。
• index.less：調用mixins.less中的函數來聲明button的相關class

我們先來看mixins.less的結構

• btn(基礎樣式，主要用設定按鈕通用樣式)：

.btn() {  display: inline-block;//行內塊元素  font-weight: @btn-font-weight;//字型粗細  text-align: center;//字型置中  touch-action: manipulation;//瀏覽器只允許進行滾動和持續縮放操作  cursor: pointer;//滑鼠移上去形狀  background-image: none;//背景圖片為空白  border: @border-width-base @border-style-base transparent;//邊框透明  white-space: nowrap;//不換行  .button-size(@btn-height-base; @btn-padding-base; @font-size-base; @btn-border-radius-base);//padding height font-size  border-radius設定  user-select: none;//文本不能被選擇  transition: all .3s @ease-in-out;//過渡  position: relative;//相對定位  > .@{iconfont-css-prefix} {    line-height: 1;//行高不帶單位是相對字型的比例  }  &,  &:active,  &:focus {    outline: 0;//是繪製於元素周圍的一條線，位於邊框邊緣的外圍，可起到突出元素的作用  }  &:not([disabled]):hover {    text-decoration: none;//定義標準的文本  }  &:not([disabled]):active {    outline: 0;    transition: none;  }  &.disabled,  &[disabled] {    cursor: not-allowed;    > * {      pointer-events: none;//元素永遠不會成為滑鼠事件的target    }  }  &-lg {    .button-size(@btn-height-lg; @btn-padding-lg; @btn-font-size-lg; @btn-border-radius-base);  }  &-sm {    .button-size(@btn-height-sm; @btn-padding-sm; @btn-font-size-sm; @btn-border-radius-sm);  }}

其中的具體屬性不多說了，不知道的可以百度屬性就知道了，大概就是設定字型粗細、字型置中、不換行、過渡、定位、邊框、啟用、焦點、hover、disabled等樣式，其中btn中調用了button-size函數。&-lg、&-sm設定大按鈕和小按鈕，調用了button-size函數

• button-size(設定按鈕大小):

.button-size(@height; @padding; @font-size; @border-radius) {  padding: @padding;  font-size: @font-size;  border-radius: @border-radius;  height: @height;}

以height、padding、font-size、border-radius為輸入參數來設定按鈕大小，寬度通過padding和font-size就能設定寬度。

• 下一個部分是設定按鈕類型為主按鈕、次按鈕、虛線按鈕、危險按鈕、幽靈按鍵樣式函數：

.button-variant-primary(@color; @background) {  .button-color(@color; @background; @background);  &:hover,  &:focus {    .button-color(@color; ~`colorPalette("@{background}", 5)`; ~`colorPalette("@{background}", 5)`);  }  &:active,  &.active {    .button-color(@color; ~`colorPalette("@{background}", 7)`; ~`colorPalette("@{background}", 7)`);  }  .button-disabled();}.button-variant-other(@color; @background; @border) {  .button-color(@color; @background; @border);  &:hover,  &:focus {    .button-color(@primary-5; @background; @primary-5);  }  &:active,  &.active {    .button-color(@primary-7; @background; @primary-7);  }  .button-disabled();}.button-variant-danger(@color; @background; @border) {  .button-color(@color; @background; @border);  &:hover {    .button-color(@btn-primary-color; ~`colorPalette("@{color}", 5)`; ~`colorPalette("@{color}", 5)`);  }  &:focus {    .button-color(~`colorPalette("@{color}", 5)`; #fff; ~`colorPalette("@{color}", 5)`);  }  &:active,  &.active {    .button-color(@btn-primary-color; ~`colorPalette("@{color}", 7)`; ~`colorPalette("@{color}", 7)`);  }  .button-disabled();}.button-variant-ghost(@color) {  .button-color(@color; transparent; @color);  &:hover,  &:focus {    .button-color(~`colorPalette("@{color}", 5)`; transparent; ~`colorPalette("@{color}", 5)`);  }  &:active,  &.active {    .button-color(~`colorPalette("@{color}", 7)`; transparent; ~`colorPalette("@{color}", 7)`);  }  .button-disabled();}

代碼中我們可以看到這些函數都是調用button-color來設定按鈕的邊框，背景，文字顏色，和調用button-disabled來設定禁用樣式。主要還是基礎顏色樣式不同，而且hover，active顏色樣式不一樣。而且在後面函數中btn-primary、btn-default、btn-ghost、btn-dashed、btn-danger調用上面的對應函數。代碼如下：

// primary button style.btn-primary() {  .button-variant-primary(@btn-primary-color; @btn-primary-bg);}// default button style.btn-default() {  .button-variant-other(@btn-default-color; @btn-default-bg; @btn-default-border);  &:hover,  &:focus,  &:active,  &.active {    background: @btn-default-bg;    text-decoration: none;  }}// ghost button style.btn-ghost() {  .button-variant-other(@btn-ghost-color, @btn-ghost-bg, @btn-ghost-border);}// dashed button style.btn-dashed() {  .button-variant-other(@btn-default-color, @btn-default-bg, @btn-default-border);  border-style: dashed;}// danger button style.btn-danger() {  .button-variant-danger(@btn-danger-color, @btn-danger-bg, @btn-danger-border);}

剩下就是按鈕組的樣式和圓按鈕的樣式

.button-group-base(@btnClassName) {//按鈕組的基礎樣式  position: relative;  display: inline-block;  > .@{btnClassName},  > span > .@{btnClassName} {    position: relative;    line-height: @btn-height-base - 2px;    &:hover,    &:focus,    &:active,    &.active {      z-index: 2;    }    &:disabled {      z-index: 0;    }  }  // size  &-lg > .@{btnClassName},  &-lg > span > .@{btnClassName} {    .button-size(@btn-height-lg; @btn-padding-lg; @btn-font-size-lg; 0);    line-height: @btn-height-lg - 2px;  }  &-sm > .@{btnClassName},  &-sm > span > .@{btnClassName} {    .button-size(@btn-height-sm; @btn-padding-sm; @font-size-base; 0);    line-height: @btn-height-sm - 2px;    > .@{iconfont-css-prefix} {      font-size: @font-size-base;    }  }}.btn-group(@btnClassName: btn) {//按鈕組主要是設定裡面一排按鈕的邊框和圓角  .button-group-base(@btnClassName);  .@{btnClassName} + .@{btnClassName},  .@{btnClassName} + &,  span + .@{btnClassName},  .@{btnClassName} + span,  > span + span,  & + .@{btnClassName},  & + & {    margin-left: -1px;  }  .@{btnClassName}-primary + .@{btnClassName}:not(.@{btnClassName}-primary):not([disabled]) {    border-left-color: transparent;  }  .@{btnClassName} {    border-radius: 0;  }  > .@{btnClassName}:first-child,  > span:first-child > .@{btnClassName} {    margin-left: 0;  }  > .@{btnClassName}:only-child {    border-radius: @btn-border-radius-base;  }  > span:only-child > .@{btnClassName} {    border-radius: @btn-border-radius-base;  }  > .@{btnClassName}:first-child:not(:last-child),  > span:first-child:not(:last-child) > .@{btnClassName} {    border-bottom-left-radius: @btn-border-radius-base;    border-top-left-radius: @btn-border-radius-base;  }  > .@{btnClassName}:last-child:not(:first-child),  > span:last-child:not(:first-child) > .@{btnClassName} {    border-bottom-right-radius: @btn-border-radius-base;    border-top-right-radius: @btn-border-radius-base;  }  &-sm {    > .@{btnClassName}:only-child {      border-radius: @btn-border-radius-sm;    }    > span:only-child > .@{btnClassName} {      border-radius: @btn-border-radius-sm;    }    > .@{btnClassName}:first-child:not(:last-child),    > span:first-child:not(:last-child) > .@{btnClassName} {      border-bottom-left-radius: @btn-border-radius-sm;      border-top-left-radius: @btn-border-radius-sm;    }    > .@{btnClassName}:last-child:not(:first-child),    > span:last-child:not(:first-child) > .@{btnClassName} {      border-bottom-right-radius: @btn-border-radius-sm;      border-top-right-radius: @btn-border-radius-sm;    }  }  & > & {    float: left;  }  & > &:not(:first-child):not(:last-child) > .@{btnClassName} {    border-radius: 0;  }  & > &:first-child:not(:last-child) {    > .@{btnClassName}:last-child {      border-bottom-right-radius: 0;      border-top-right-radius: 0;      padding-right: 8px;    }  }  & > &:last-child:not(:first-child) > .@{btnClassName}:first-child {    border-bottom-left-radius: 0;    border-top-left-radius: 0;    padding-left: 8px;  }}