···38 return css;
39};
40```
41+42+Additionally `prefixValue` can accept full declarations to avoid
43+having to apply it before concatenation, which can be useful in case
44+you're trying to minimise string operations:
45+46+```js
47+const declaration = 'position: sticky';
48+prefixValue(declaration, declaration); // 'position: -webkit-sticky, sticky'
49+```