Hard to measure, the javascript I worked with was mostly front-end, which is harder to write automated tests for. Not impossible, but the higher friction natur

Hard to measure, the javascript I worked with was mostly front-end, which is harder to write automated tests for. Not impossible, but the higher friction naturally leads to less tests, especially given how frequent the front-end changes. "Level of safety" would also need better quantification. Something that a peer-reviewed study would be better suited for