es5-shim和underscore.js？(es5-shim and underscore.js?)

 我的JavaScript项目中有es5-shim.js和underscore.js 。 
 
 es5-shim.js只需添加一些JavaScript本机功能，如reduce和some数组为Internet Explorer和一些旧的浏览器。 underscore.js添加相同的东西（但语法不同）以及更多东西（对象和数组的实用函数）。 
 
 但是，如果存在由es5-shim添加的函数，则underscore.js会使用它们。 
 
 因此，在Firefox或Chrome等“近期”浏览器中，underscore.js使用浏览器的本机功能。 我认为它比纯JavaScript功能更好。 但在Internet Explorer上，underscore.js使用es5-shim函数。 如果我删除es5-shim.js，underscore.js使用它自己的函数。 
 
 对此有何建议？ 我应该从我的项目中删除es5-shim，只使用underscore.js？ 或者我应该让underscore.js使用es5-shim的函数？ 

I have both es5-shim.js and underscore.js in my JavaScript project.
 
es5-shim.js just add some javascript native functions like reduce and some on arrays for Internet Explorer and some old browsers. underscore.js add the same thing (but with a different syntax) and many more thing (utility functions on objects and arrays).
 
But, if the functions added by es5-shim exists, underscore.js use them.
 
So, on a "recent" browser like Firefox or Chrome, underscore.js use the native functions of the browser. I think it's better than a pure javascript function. But on Internet Explorer, underscore.js use the es5-shim functions. If I remove es5-shim.js, underscore.js use its own functions.
 
Any advice on that ? Should i remove es5-shim from my project and only use underscore.js ? Or should i let underscore.js use es5-shim's functions ?

原文：https://stackoverflow.com/questions/13540951