Configring node js.

node_modules/core-js/modules/_string-pad.js

@@ -0,0 +1,16 @@
+// https://github.com/tc39/proposal-string-pad-start-end
+var toLength = require('./_to-length')
+  , repeat   = require('./_string-repeat')
+  , defined  = require('./_defined');
+
+module.exports = function(that, maxLength, fillString, left){
+  var S            = String(defined(that))
+    , stringLength = S.length
+    , fillStr      = fillString === undefined ? ' ' : String(fillString)
+    , intMaxLength = toLength(maxLength);
+  if(intMaxLength <= stringLength || fillStr == '')return S;
+  var fillLen = intMaxLength - stringLength
+    , stringFiller = repeat.call(fillStr, Math.ceil(fillLen / fillStr.length));
+  if(stringFiller.length > fillLen)stringFiller = stringFiller.slice(0, fillLen);
+  return left ? stringFiller + S : S + stringFiller;
+};