javascript - Gulp imagemin optimization removes svg symbol -

this first time use gulp task-runner or kind of task-runner. hope state problem in understandable way.

i have svg file named svg-system.svg contains:

<svg xmlns="http://www.w3.org/2000/svg">     <!-- facebook icon -->     <symbol id="facebook" role="img" aria-labelledby="title desc" viewbox="0 0 9.3 20">         <title id="title">logo af facebook</title>         <desc id="desc">logoet bruges til link indikator @ tilgå vores facebook side eller dele os.</desc>         <path d="m9.3,6.5l8.9,10h6.1c0,4.5,0,10,0,10h2c0,0,0-5.5,0-10h0v6.5h2v4.2c2,2.6,2.8,0,6.2,0l3.1,0v3.4         c0,0-1.9,0-2.2,0c-0.4,0-0.9,0.2-0.9,1v2.1h9.3z"/>     </symbol> </svg> 

and compress file / optimize dist save kilobytes.

my confiq in gulpfile.js looks this:

gulp.task('images', function() {   return gulp.src('app/images/**/*.+(png|jpg|jpeg|gif|svg)')     // caching images ran through imagemin     .pipe(cache(imagemin({         options: {             optimizationlevel: 3,             progessive: true,             interlaced: true,             removeviewbox:false,             removeuselessstrokeandfill:false,             cleanupids:false         }     })))     .pipe(gulp.dest('dist/images')); }); 

when run task outputs svg-system.svg content only:

<svg xmlns="http://www.w3.org/2000/svg"/> 

any suggestions or have seen issue , fixed it? cheers.

you have right general idea: setting cleanupids false indeed keep <symbol> around. way you're doing wrong.

you're trying pass options object imagemin(). while gulp-imagemin in fact have options argument, only supports verbose option. none of options specify passed along svgo.

you need explicitly pass options svgo plugin. way pretty weird , complicated, here go:

imagemin([   imagemin.svgo({     plugins: [       { optimizationlevel: 3 },       { progessive: true },       { interlaced: true },       { removeviewbox: false },       { removeuselessstrokeandfill: false },       { cleanupids: false }    ]  }),  imagemin.gifsicle(),  imagemin.jpegtran(),  imagemin.optipng() ])