diff options
Diffstat (limited to 'node_modules/es-abstract/2016/CanonicalNumericIndexString.js')
-rw-r--r-- | node_modules/es-abstract/2016/CanonicalNumericIndexString.js | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2016/CanonicalNumericIndexString.js b/node_modules/es-abstract/2016/CanonicalNumericIndexString.js new file mode 100644 index 000000000..625f8539a --- /dev/null +++ b/node_modules/es-abstract/2016/CanonicalNumericIndexString.js @@ -0,0 +1,22 @@ +'use strict'; + +var GetIntrinsic = require('../GetIntrinsic'); + +var $TypeError = GetIntrinsic('%TypeError%'); + +var SameValue = require('./SameValue'); +var ToNumber = require('./ToNumber'); +var ToString = require('./ToString'); +var Type = require('./Type'); + +// https://ecma-international.org/ecma-262/6.0/#sec-canonicalnumericindexstring + +module.exports = function CanonicalNumericIndexString(argument) { + if (Type(argument) !== 'String') { + throw new $TypeError('Assertion failed: `argument` must be a String'); + } + if (argument === '-0') { return -0; } + var n = ToNumber(argument); + if (SameValue(ToString(n), argument)) { return n; } + return void 0; +}; |