当我尝试导入react时，抛出一个错误，提示react无效，是“意外标识符”
#############################################################################
//index.html
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="root"></div>
<script src="index.js"></script>
</body>
</html>
#############################################################################
//index.js
import React from "react"
import ReactDOM from "react-dom"
ReactDOM.render(<h1>Hello World</h1>, document.getElementById("root"));
#############################################################################
ERROR: Uncaught SyntaxError: Unexpected identifier
答案 0 :(得分：1)
浏览器无法理解docker ps | out-file D:\temp\PAW_ps.csv
$csv = Import-Csv D:\Temp\PAW_ps.csv
foreach ($row in $csv)
{
$name = $row.NAMES
$status = $row.STATUS
if ($status -ne "UP")
{
echo "The process $name is not Up"
}
Output of docker ps | gm
PS C:\Windows\system32> docker ps | gm
TypeName: System.String
Name MemberType Definition
---- ---------- ----------
Clone Method System.Object Clone(), System.Object
ICloneable.Clone()
CompareTo Method int CompareTo(System.Object value),
int CompareTo(string strB), int IComparable.CompareTo(System.Object obj), int IComparable[string].CompareTo(string other)
Contains Method bool Contains(string value)
CopyTo Method void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count)
EndsWith Method bool EndsWith(string value), bool EndsWith(string value, System.StringComparison comparisonType), bool EndsWith(string value, bool ignoreCase, cultureinfo culture)
Equals Method bool Equals(System.Object obj), bool Equals(string value), bool Equals(string value, System.StringComparison comparisonType), bool IEquatable[string].Equals(string other)
GetEnumerator Method System.CharEnumerator GetEnumerator(), System.Collections.IEnumerator IEnumerable.GetEnumerator(), System.Collections.Generic.IEnumerator[char] IEnumerable[char].GetEnumerator()
GetHashCode Method int GetHashCode()
GetType Method type GetType()
GetTypeCode Method System.TypeCode GetTypeCode(), System.TypeCode IConvertible.GetTypeCode()
IndexOf Method int IndexOf(char value), int IndexOf(char value, int startIndex), int IndexOf(char value, int startIndex, int count), int IndexOf(string value), int IndexOf(string value, int startIndex), int IndexOf(string value, i...
IndexOfAny Method int IndexOfAny(char[] anyOf), int IndexOfAny(char[] anyOf, int startIndex), int IndexOfAny(char[] anyOf, int startIndex, int count)
Insert Method string Insert(int startIndex, string value)
IsNormalized Method bool IsNormalized(), bool IsNormalized(System.Text.NormalizationForm normalizationForm)
LastIndexOf Method int LastIndexOf(char value), int LastIndexOf(char value, int startIndex), int LastIndexOf(char value, int startIndex, int count), int LastIndexOf(string value), int LastIndexOf(string value, int startIndex), int Las...
LastIndexOfAny Method int LastIndexOfAny(char[] anyOf), int LastIndexOfAny(char[] anyOf, int startIndex), int LastIndexOfAny(char[] anyOf, int startIndex, int count)
Normalize Method string Normalize(), string Normalize(System.Text.NormalizationForm normalizationForm)
PadLeft Method string PadLeft(int totalWidth), string PadLeft(int totalWidth, char paddingChar)
PadRight Method string PadRight(int totalWidth), string PadRight(int totalWidth, char paddingChar)
Remove Method string Remove(int startIndex, int count), string Remove(int startIndex)
Replace Method string Replace(char oldChar, char newChar), string Replace(string oldValue, string newValue)
Split Method string[] Split(Params char[] separator), string[] Split(char[] separator, int count), string[] Split(char[] separator, System.StringSplitOptions options), string[] Split(char[] separator, int count, System.StringSpl...
StartsWith Method bool StartsWith(string value), bool StartsWith(string value, System.StringComparison comparisonType), bool StartsWith(string value, bool ignoreCase, cultureinfo culture)
Substring Method string Substring(int startIndex), string Substring(int startIndex, int length)
ToBoolean Method bool IConvertible.ToBoolean(System.IFormatProvider provider)
ToByte Method byte IConvertible.ToByte(System.IFormatProvider provider)
ToChar Method char IConvertible.ToChar(System.IFormatProvider provider)
ToCharArray Method char[] ToCharArray(), char[] ToCharArray(int startIndex, int length)
ToDateTime Method datetime IConvertible.ToDateTime(System.IFormatProvider provider)
ToDecimal Method decimal IConvertible.ToDecimal(System.IFormatProvider provider)
ToDouble Method double IConvertible.ToDouble(System.IFormatProvider provider)
ToInt16 Method int16 IConvertible.ToInt16(System.IFormatProvider provider)
ToInt32 Method int IConvertible.ToInt32(System.IFormatProvider provider)
ToInt64 Method long IConvertible.ToInt64(System.IFormatProvider provider)
ToLower Method string ToLower(), string ToLower(cultureinfo culture)
ToLowerInvariant Method string ToLowerInvariant()
ToSByte Method sbyte IConvertible.ToSByte(System.IFormatProvider provider)
ToSingle Method float IConvertible.ToSingle(System.IFormatProvider provider)
ToString Method string ToString(), string ToString(System.IFormatProvider provider), string IConvertible.ToString(System.IFormatProvider provider)
ToType Method System.Object IConvertible.ToType(type conversionType, System.IFormatProvider provider)
ToUInt16 Method uint16 IConvertible.ToUInt16(System.IFormatProvider provider)
ToUInt32 Method uint32 IConvertible.ToUInt32(System.IFormatProvider provider)
ToUInt64 Method uint64 IConvertible.ToUInt64(System.IFormatProvider provider)
ToUpper Method string ToUpper(), string ToUpper(cultureinfo culture)
ToUpperInvariant Method string ToUpperInvariant()
Trim Method string Trim(Params char[] trimChars), string Trim()
TrimEnd Method string TrimEnd(Params char[] trimChars)
TrimStart Method string TrimStart(Params char[] trimChars)
Chars ParameterizedProperty char Chars(int index) {get;}
Length Property int Length {get;}
语句，您必须使用babel来转换代码，并使用webpack来捆绑。另外，请尝试使用React Starter Kit，例如create-react-app是使用babel和webpack配置的