[ 源代码： node-es5-shim ]
软件包：libjs-es5-shim（4.6.7-2）
ECMAScript 5 compatibility shims for old JavaScript engines (library)
The es5-shim library monkey-patches a JavaScript context to contain all ECMAScript 5 methods that can be faithfully emulated with a legacy JavaScript engine.
The es5-sham part tries to complete the picture as best as possible, but for those methods the result is not as close and mostly intends to avoid runtime errors : in many cases it might just silently fail.