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User:Shaver/ES4 FAQ: Difference between revisions
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→If browsers implement the whole of ES4, will it break my existing scripts?
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No. | No. | ||
The ECMA committee chartered to develop and maintain the ECMAScript specification, known as "TG1", has taken compatibility with existing scripts as their number one priority. The vast majority of features in ES4 which could conflict with, or change the meaning of, existing ES3 (JS1.x) scripts aren't available unless the script author explicitly opts into them. | The ECMA committee chartered to develop and maintain the ECMAScript specification, known as "TG1", has taken compatibility with existing scripts as their number one priority. The vast majority of features in ES4 which could conflict with, or change the meaning of, existing ES3 (JS1.x) scripts aren't available unless the script author explicitly opts into them. All bug fixes to the language specification are being checked extensively against real-world use, and will be tested in wide-scale browser deployments before the standard is finalized. | ||
== What sort of changes are in ES4? == | |||
There are several categories of changes introduced in ES4 which can affect existing ES3 code: | There are several categories of changes introduced in ES4 which can affect existing ES3 code: | ||