Compatibility requirements

Vue doesn't have any dependency and can be used in any ECMAScript 5 minimum-compliant browser. This means that it is not compatible with Internet Explorer 8 or less, because it needs relatively new JavaScript features such as Object.defineProperty, which can't be polyfilled on older browsers.

In this book, we are writing code in JavaScript version ES2015 (formerly ES6), so for the first few chapters, you will need a modern browser to run the examples (such as Edge, Firefox, or Chrome). At some point, we will introduce a compiler called Babel that will help us make our code compatible with older browsers.