vue hello world项目
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var global = require('../internals/global');
var fails = require('../internals/fails');
var uncurryThis = require('../internals/function-uncurry-this');
var toString = require('../internals/to-string');
var trim = require('../internals/string-trim').trim;
var whitespaces = require('../internals/whitespaces');
var charAt = uncurryThis(''.charAt);
var n$ParseFloat = global.parseFloat;
var Symbol = global.Symbol;
var ITERATOR = Symbol && Symbol.iterator;
var FORCED = 1 / n$ParseFloat(whitespaces + '-0') !== -Infinity
// MS Edge 18- broken with boxed symbols
|| (ITERATOR && !fails(function () { n$ParseFloat(Object(ITERATOR)); }));
// `parseFloat` method
// https://tc39.es/ecma262/#sec-parsefloat-string
module.exports = FORCED ? function parseFloat(string) {
var trimmedString = trim(toString(string));
var result = n$ParseFloat(trimmedString);
return result === 0 && charAt(trimmedString, 0) == '-' ? -0 : result;
} : n$ParseFloat;