javascript - Why does gulp-useref does not seem to work with a comment in the replacement section? -


i trying build gulp pipeline – want inject css index.html (this works fine) , grab other links source index.html , replace them in outputted version.

i noticed useref call mangling output if templated section replace includes html comment (see example below line comment). it’s easiest demonstrate code:

index.html (source file)

<!-- build:css styles/app.css--> <!--comment--> <link rel="stylesheet" href="/.tmp/styles.css"> <!-- endbuild -->

gulpfile.js task

gulp.task('optimizereplace', function () {     var assets = $.useref.assets({ searchpath: './' });      return gulp         .src('./src/client/index.html')         .pipe(assets)         .pipe(assets.restore())         .pipe($.useref())  //this problem line; if inject not run first mangled         .pipe(gulp.dest('./wwwroot/')); });

output (index.html)

</style> <link rel="stylesheet" href="styles/lib.css"> <link rel="stylesheet" href="styles/app.css-->" <!--comment> </head>  <body>   <div>

the problem easier see in html, comment html comment looses end half of tag, after thinks comment.

the reason want put comment inside replacement section comment gulp-inject statement injects other references before useref. simplified down simple html comment causing problem.

this line causes problem: .pipe($.useref())

fyi following john papa’s course on pluralsight uses exact mechanism inject css , replace them – (the inject:css html comment delimiters mangled after useref):

<!-- build:css styles/app.css--> <!-- inject:css --> <link rel="stylesheet" href="/.tmp/styles.css"> <!-- endinject --> <!-- endbuild -->

how can useref() replace template correct links but leave html comment intact?

thanks.

the reason version change check documentation https://www.npmjs.com/package/gulp-useref here have example:

gulp.task('optimize', ['templatecache', 'images'], function(){      var templatecache = config.temp + config.templatecache.files;      return gulp     .src(config.index)     .pipe($.plumber())     .pipe($.inject(gulp.src(templatecache, {read: false}, {starttag: ''})))     .pipe($.useref({ searchpath: './' }))     .pipe(gulp.dest(config.build)); });

hope helps


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