gulp-pagebuilder
Pagebuilder is a build and real time include engine for HTML, JavaScript, CSS and in general any type of text file that you wish to might want to "include" other files into.
Install with npm.
npm install --save-dev gulp-pagebuilder
var gulp = require('gulp'),
pagebuilder = require('gulp-pagebuilder'));
gulp.task('default', function () {
gulp.src('src/*.html')
.pipe(pagebuilder('src'))
.pipe(gulp.dest('build/'));
});
<div class="someclass" >
[snp tpl="some/block/in/src/somefile.html" class="foo bar" ]
</div>
<div class="otherclass {class}" >
Some content
</div>
<div class="someclass" >
<div class="otherclass foo bar" >
Some content
</div>
</div>