3 ms·
JavaScript: The Good Parts predated ES5, and certainly predated actual adoption. IE didn't support basically any of ES5 until 2011 with IE 9, and, for example,
by zerocrates 12y ago
JavaScript: The Good Parts predated ES5, and certainly predated actual adoption.
IE didn't support basically any of ES5 until 2011 with IE 9, and, for example, Safari didn't support bind() until 2012. Strict mode didn't appear until IE 10, Firefox 4, and Chrome 13. Those dates aren't so great even if you ignore that you'd often have to support the earlier versions for a significant amount of time anyway.