在基於bootstrap css框架的前端專案開發中,如果有grunt build系統,那麼工作流是:客製化less,在less中定義自己的
CSS,同時可以隨意引用bootstrap中預定義好的css類,一旦儲存檔案,grunt則開始重新構建,生成最後的生產檔案。問題是:
如何能夠在自己的客制less檔案中引入bootstrap的less變數或者mixin呢?
比如:我如何能夠實現在螢幕尺寸在@screen-md時,將所有的圖片隱藏呢?
對於這個場景,假設專案目錄結構如下:
> bower_components
> bootstrap
> font-awesome
> requirejs
...
> css
- project.css
> less
- project.less
- variables.less
可行的辦法為:
1.在project.less中import bootstrap.less,font-awsome,以及自己定義的專案所需less檔案:
// Bootstrap framework
@import "../../bower_components/bootstrap/less/bootstrap.less";
// Font-awesome awesomeness
@import "../../bower_components/font-awesome/less/font-awesome.less";
// Project specific stuff
@import "variables.less";
@import "stuff.less";
2.在variables.less檔案中一方面定義自己的所需變數,另一方面可以覆蓋掉bootstrap的預置變數;
// Override Bootstrap variables
@font-family-sans-serif: "Lucida Grande","Lucida Sans Unicode",Arial,sans-serif;
@btn-default-border: #bbb;
@brand-primary: #b02b2c;
@link-color: #08c;
// Override Font-Awesome variables (path relative to project.css position)
@fa-font-path: "../bower_components/font-awesome/fonts";
//Map Bootstrap variables to myproject specific names
@my-customname-float-breakpoint: @grid-float-breakpoint;
@theme-color: @brand-primary;
//Project specific variables
@my-favourite-color: rgb(228, 1, 1);
3.僅僅編譯project.less檔案,最後生成一個包羅永珍的巨大css檔案(注意這裡也包含font-awsome)
4.既然在project.less中已經引入了bootstrap.less,那麼在後面import的自創less檔案自然可以引用任何bootstrap less變數或mixin,比如:
// Hide all images at a viewport smaller than 992px (aka @screen-md)
@media (max-width: @screen-sm-max) {
img {
display: none;
}
}
原文出處:
http://stackoverflow.com/questions/20246514/using-twitter-bootstrap-3-during-development
http://transmission.vehikl.com/using-bootstrap-as-a-semantic-mixin-library/
http://www.helloerik.com/bootstrap-3-less-workflow-tutorial
http://slicejack.com/bootstrap-with-less-workflow/
https://www.npmjs.com/package/grunt-include-bootstrap
http://stackoverflow.com/questions/12655034/how-to-use-bootstrap-and-less-and-keep-a-clean-project