我了解了list of cssnano optimizations:它包括autoprefixer
(非默认),cssnano-util-raw-cache
等。
接下来我查看gulp-postcss documentation:它有以下示例:
var postcss = require('gulp-postcss');
var gulp = require('gulp');
var autoprefixer = require('autoprefixer');
var cssnano = require('cssnano');
gulp.task('css', function () {
var plugins = [
autoprefixer({browsers: ['last 1 version']}),
cssnano()
];
return gulp.src('./src/*.css')
.pipe(postcss(plugins))
.pipe(gulp.dest('./dest'));
});
好吧,虽然有人说autoprefixer
是cssnano
优化之一,但在上面的示例中,它是单独定义的。但是,我无法从上面的示例中了解如何从第一个链接(cssnano优化列表)设置所需的优化。
电子。 G。我想在开发和生产版本中使用postcss-calc
,但是我只需要在生成版本中使用postcss-normalize-whitespace
。我该如何填写以下代码?
const gulp = require('gulp'),
gulpIf = require('gulp-if'),
sass = require('gulp-sass'),
postcss = require('gulp-postcss');
const isDevelopment = !process.env.NODE_ENV || process.env.NODE_ENV === 'develpment';
gulp.task('styles', function(){
// first the optimizations for both Development and production
let plugins = [
autoprefixer({ browsers: ['>= 1%', 'last 5 major versions', 'ie >= 6']}),
// ...
];
if (isDevelopment) {
plugins.push(/* plugins for development build */);
}
else {
plugins.push(/* plugins for production build */);
}
return gulp.src(HPath.sassSourceFilesSelection)
.pipe(gulpIf(isDevelopment, sourcemaps.init()))
.pipe(sass())
.pipe(postcss(plugins))
// ...
});
答案 0 :(得分:2)
let PostCssPlugins = [
// non-conditional
require('cssnano-util-raw-cache')(),
// conditional
!options.isDevelopment ? require('postcss-normalize-whitespace')() : false
].filter(Boolean);
return gulp.src(sassFilesSelection)
.pipe(plugins.sass())
.pipe(plugins.postcss(PostCssPlugins))
.pipe(gulp.dest(outputPath));