@parcel/css parsing all values ​​using the proper grammar from the CSS specification and deliver a specific value type for each property.
Browser-grade parser
@parcel/css is based on the cssparser and selectors crates created by Mozilla and used by Firefox and Servo.
Minification –
One of the main purposes of @parcel/css is to minify CSS to make it smaller, includes many optimizations, including: Merge adjacent rules with the same selectors or declarations when it is safe to do so. Combining CSS turns into a single matrix or vice versa if smaller.
For making images responsive , if you are using bootstrap framework use the class ‘img-responsive’. Creating fullwidth background with css , wrap the content with a div and apply the below css with background image, example given below