Third-party hosted website assets, such as JavaScript libraries, are vulnerable to tampering. However, a new technique named Subresource Integrity (SRI) is here to protect these external assets.
One problem is the slow implementation of SRI, thus sritest.io was born. The new service enables website owners and frontend developers to evaluate their sites for SRI hash usage. Sritest.io aims to help the widespread implementation of SRI, thus, ultimately protect website visitors from malicious code.