98 lines
2.0 KiB
Markdown
98 lines
2.0 KiB
Markdown
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#Browsersync - Gulp, SASS + Slow running tasks
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## Installation/Usage:
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To try this example, follow these 4 simple steps.
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**Step 1**: Clone this entire repo
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```bash
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$ git clone https://github.com/Browsersync/recipes.git bs-recipes
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```
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**Step 2**: Move into the directory containing this example
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```bash
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$ cd bs-recipes/recipes/gulp.task.sequence
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```
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**Step 3**: Install dependencies
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```bash
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$ npm install
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```
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**Step 4**: Run the example
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```bash
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$ npm start
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```
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### Additional Info:
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This example highlights a common problem where you don't want to reload
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the browser until a 2 or more slow-running tasks have completed. The solution
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is to create the intermediate task that ensures `browserSync.reload` is not
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called until both slow tasks are complete.
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### Preview of `gulpfile.js`:
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```js
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var gulp = require('gulp');
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var browserSync = require('browser-sync');
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var sass = require('gulp-sass');
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var reload = browserSync.reload;
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var through = require("through2");
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/**
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* A slow task
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*/
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gulp.task('slow1', function () {
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return gulp.src('./app/*.html')
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.pipe(slowStream());
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});
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/**
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* Another Slow task
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*/
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gulp.task('slow2', function () {
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return gulp.src('./app/*.html')
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.pipe(slowStream());
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});
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/**
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* Separate task for the reaction to a file change
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*/
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gulp.task('html-watch', ['slow1', 'slow2'], reload);
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/**
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* Sass task for live injecting into all browsers
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*/
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gulp.task('sass', function () {
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return gulp.src('./app/scss/*.scss')
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.pipe(sass())
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.pipe(gulp.dest('./app/css'))
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.pipe(reload({stream: true}));
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});
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/**
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* Serve and watch the html files for changes
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*/
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gulp.task('default', function () {
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browserSync({server: './app'});
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gulp.watch('./app/scss/*.scss', ['sass']);
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gulp.watch('./app/*.html', ['html-watch']);
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});
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/**
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* Simulate a slow task
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*/
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function slowStream () {
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return through.obj(function (file, enc, cb) {
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this.push(file);
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setTimeout(cb, 2000);
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});
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}
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```
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