vue hello world项目
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var global = require('../internals/global');
var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');
var isCallable = require('../internals/is-callable');
var classofRaw = require('../internals/classof-raw');
var wellKnownSymbol = require('../internals/well-known-symbol');
var TO_STRING_TAG = wellKnownSymbol('toStringTag');
var Object = global.Object;
// ES3 wrong here
var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
// fallback for IE11 Script Access Denied error
var tryGet = function (it, key) {
try {
return it[key];
} catch (error) { /* empty */ }
};
// getting tag from ES6+ `Object.prototype.toString`
module.exports = TO_STRING_TAG_SUPPORT ? classofRaw : function (it) {
var O, tag, result;
return it === undefined ? 'Undefined' : it === null ? 'Null'
// @@toStringTag case
: typeof (tag = tryGet(O = Object(it), TO_STRING_TAG)) == 'string' ? tag
// builtinTag case
: CORRECT_ARGUMENTS ? classofRaw(O)
// ES3 arguments fallback
: (result = classofRaw(O)) == 'Object' && isCallable(O.callee) ? 'Arguments' : result;
};