grunt-scss-image-helpers

Grunt tasks to replace Compass image helpers. It is recommended to run this task with watch task on image folder only.

Helpers

All helpers have one argument: image name. Name is created relatively to the imageRoot option. If we want to use an image in subfolder, we need to enter a path incl. folder name.

Example: image-url('foo.png'), image-url('subfolder/foo.png')

image-width()

Returns width of specified image in pixels (for example 30px).

image-height()

Returns height of specified image in pixels (for example 30px).

image-url()

Returns path to specified image including url().

Example: background-image: image-url('foo.bar') is compiled to background-image: url('foo.bar').

When relativePath is set to ../img/, helper will return url('../img/foo.bar').

When antiCache is set to true, helper will return path with timestamp: url('foo.12345678.bar) or url('../img/foo.12345678.bar').

inline-image()

Returns image as data url.

Example: inline-image('foo.png') becomes url('data:image/png;base64,...').

Options

imageRoot

Type: String
Default: ''

Path to image folder. All image names are created relatively to this folder.

prefix

Type: String
Default: grunt-images

Prefix for SCSS variables. These variables are created: $grunt-images-names, $grunt-images-widths, $grunt-images-heights, $grunt-images-base64 and $grunt-images-relative-path.

antiCache

Type: Boolean
Default: false

If set to true, task generates file names with timestamps to invalidate browser cache.

relativePath

Type: String
Default: ''

All image paths in css are prefixed with this path. For example path ../img/ and image foo.png become ../img/foo.png.

size

Type: Integer
Default: 10240

Maximum file size for base64 encoding. Images bigger than that won't be encoded.

Example config

grunt.initConfig({
    scss_images: {
        dist: {
            options: {
                imageRoot: 'assets/img/',
                prefix: 'grunt-images',
                antiCache: true,
                relativePath: '../img/',
                size: 4096
            },
            files: {
                'assets/scss/_images.scss': ['assets/img/*.png']
            }
        }
    }
});

grunt.loadNpmTasks('grunt-scss-image-helpers');
grunt.registerTask('default', ['scss_images']);

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