what is autoprefixer code example

Example: autoprefixer\

/*
* Prefixed by https://autoprefixer.github.io
* PostCSS: v7.0.29,
* Autoprefixer: v9.7.6
* Browsers: last 4 version
*/

.example {
    display: -ms-grid;
    display: grid;
    -webkit-transition: all .5s;
    -o-transition: all .5s;
    transition: all .5s;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
    background: -webkit-gradient(linear, left top, left bottom, from(white), to(black));
    background: -o-linear-gradient(top, white, black);
    background: linear-gradient(to bottom, white, black);
}