欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  web前端

gulp-css-spriter 将css代码中的切片图片合并成雪碧图_html/css_WEB-ITnose

程序员文章站 2022-04-29 15:27:12
...
NPM地址:https://www.npmjs.com/package/gulp-css-spriter/

配置gulpfile.js:

var gulp = require('gulp'),

minifyCSS = require('gulp-minify-css'),
spriter = require('gulp-css-spriter');

gulp.task('css', function() {

var timestamp = + new Date();
// 需要自动合并雪碧图的样式文件
return gulp.src('./src/css/style.css')
.pipe(spriter({
// 生成的spriter的位置
'spriteSheet': './dist/images/sprite'+timestamp+'.png',
// 生成样式文件图片引用地址的路径
// 如下将生产:backgound:url(../images/sprite20324232.png)
'pathToSpriteSheetFromCSS': '../images/sprite'+timestamp+'.png'
}))
.pipe(minifyCSS())
// 产出路径
.pipe(gulp.dest('./dist'));
});

技巧 :

gulp-css-spriter默认会对样式文件里,所有的background/background-image的图片合并,

但实际项目中,我们不是所有的图片都需要合并。

background-image: url(../slice/p1-3.png?__spriter);//有?__spriter后缀的合并

background-image: url(../slice/p-cao1.png); //不合并

修改下面文件可以按需合并。

node_modules\gulp-css-spriter\lib\map-over-styles-and-transform-background-image-declarations.js

48行开始的if-else if代码块中,替换为下面代码:

// background-image always has a url 且判断url是否有?__spriter后缀

if(transformedDeclaration.property === 'background-image' && /\?__spriter/i.test(transformedDeclaration.value)) {

transformedDeclaration.value = transformedDeclaration.value.replace('?__spriter','');
return cb(transformedDeclaration, declarationIndex, declarations);
}
// Background is a shorthand property so make sure `url()` is in there 且判断url是否有?__spriter后缀
else if(transformedDeclaration.property === 'background' && /\?__spriter/i.test(transformedDeclaration.value)) {

transformedDeclaration.value = transformedDeclaration.value.replace('?__spriter','');
var hasImageValue = spriterUtil.backgroundURLRegex.test(transformedDeclaration.value);

if(hasImageValue) {
return cb(transformedDeclaration, declarationIndex, declarations);
}
}

如图:

执行效果: