There is already a Javascript implementation [1], but it is not feasible to setup a full IPFS node in every browser tab that loads an IPFS resource. Instead you can use ipfs-companion [2], a browser extension that lets you easily load IPFS resources in your browser. While it can use the Javascript implementation, this is not recommended as it is currently pretty resource heavy [3].

[1] https://github.com/ipfs/js-ipfs

[2] https://github.com/ipfs-shipyard/ipfs-companion

[3] https://github.com/ipfs-shipyard/ipfs-companion/blob/master/...