如何使用雪碧图

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#154

CSS3, font icons, svg
Yes! CSS3, font icons, svg are great tools! But unfortunately there are some layouts and solutions we need to compress to reduce the number of requests.

There are some approaches to figure out this issue easily.

Using gulp spritesmith.
Using compass sprite.

We could include both in a option. If the user select to use sass, ask for compass and include the task. if the user select other css preprocessor, we could ask for include spritesmith.

I've been using spritesmith + imagemin + csso in production and works pretty good!

A simple example:

gulp.task('sprite', function () {
    var spritesmith = require('gulp.spritesmith');
    var imagemin = require('gulp-imagemin');
    var csso = require('gulp-csso');
    var del = require('del');
    // Generate our spritesheet
    del(['app/css/*_sprite.png'], function (err) {
        var spriteData = gulp.src('src/images/**/*.png').pipe(spritesmith({
            imgName: new Date().getTime()+'_sprite.png',
            cssName: 'sprite.css'
        }));
        // Pipe image stream through image optimizer and onto disk
        spriteData.img
            .pipe(imagemin())
            .pipe(gulp.dest('app/css/'));

        // Pipe CSS stream through CSS optimizer and onto disk
        spriteData.css
            .pipe(csso())
            .pipe(gulp.dest('src/css/'));
    });
});

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