Another way could be to use gulp-template so you can generate any structure you want for your JavaScript.
Sharing Variables between Javascript and Sass using Gulp with gulp-template
https://youtu.be/UVeUq8gMYco
It's created from scratch so people could see it from the ground up and there is a git repo with the end result:
https://github.com/PocketNinjaCoUk/shared-js-sass-vars-using-gulp/tree/master/dev
You basically have your config object
saved at ./dev/config.js
module.exports = {
defaults: {
colours: {
primary: '#fc0'
},
sizes: {
small: '100px',
medium: '500px',
large: '1000px'
},
zIndex: {
model: 100,
dropdown: 50,
header: 10
}
}
}
Then you have both of your templates for Sass and Javascript, or less or whatever you want.
Sass underscore template
saved at ./dev/templates/sass-config.txt
<% _.each(defaults, function(category, key) { %>
// Var <%= key %>
<% _.each(category, function(value, key) { %>
$<%= key %>: <%= value %>;
<% }) %>
<% }) %>
Javascript underscore template
saved at ./dev/templates/js-config.txt
namespace.config = {};
<% _.each(defaults, function(monkey, key) { %>
namespace.config.<%= key %> = {
<% i = 1 %>
<% _.each(monkey, function(value, key) { %>
<% comma = (Object.keys(monkey).length === i) ? '': ',' %>
<% if(typeof value === 'string') {%>
<%= key %>: '<%= value %>'<%= comma %>
<%} else { %>
<%= key %> : <%= value %><%= comma %>
<% } %>
<% i++ %>
<% }); %>
};
<% }) %>
Then the gulp to compile it
var gulp = require('gulp');
var template = require('gulp-template');
var rename = require('gulp-rename');
var removeEmptyLines = require('gulp-remove-empty-lines');
var sharedVars = require('./dev/config');
gulp.task('compile', function() {
gulp.src('./dev/templates/sass-config.txt')
.pipe(template(sharedVars))
.pipe(rename('_sass-config.scss'))
.pipe(removeEmptyLines())
.pipe(gulp.dest('./dev/sass'));
gulp.src('./dev/templates/js-config.txt')
.pipe(template(sharedVars))
.pipe(rename('js-config.js'))
.pipe(removeEmptyLines())
.pipe(gulp.dest('./dev/js'));
});
:export { animationMillis: strip-unit($animation-length-ms);}with strip-unit so we can directly use the variable as a number without the need to parse a string. – Impenetrability