Does the browserslist option in Gulp's Autoprefixer plugin define what browsers should be included or excluded?

Question

Possibly the dumbest question I've asked but I'm finding the documentation and the limited examples quite hazy.

I'd like to support as many browsers as possible, including IE7+ e.g.

.pipe(autoprefixer({
    browsers: ['last 5 versions', 'ie >= 7']
})

Logically, I assume the 'browsers' option above exists to define exactly which browsers, or range of browsers, should be supported. In other words, the above may translate as:

"Support the last 5 versions of every browser AND ensure that all versions of IE (from 7 upwards) are supported."

Another way of saying it:

"Don't remove any styles that are required by these browsers"

Have I understood the browsers option correctly please?

Answer 1

Yeap, you understand browsers correctly. ['last 5 versions', 'ie >= 7'] means “Support the last 5 versions of every browser and ensure that all versions of IE (from 7 upwards) are supported”.