キーワード

キーワードは構文などに使われるため、変数名などに使えない。

予約語 (FutureReservedWord) も同時に書いてある。

予約語は、他言語への移植などの時に障害となるような単語も含まれていて、必ずしも本当に将来使うという意味ではない。

abstract (ES2:reserved)

boolean (ES2:reserved)

break (ES1)

byte (ES2:reserved)

case (ES1:reserved, ES3)

catch (ES1:reserved, ES3)

char (ES2:reserved)

class (ES1:reserved, ES2015)

const (ES1:reserved, ES2015)

continue (ES1)

debugger (ES1:reserved, ES5)

default (ES1:reserved, ES3)

delete (ES1)

do (ES1:reserved, ES3)

double (ES2:reserved)

else (ES1)

enum (ES1:reserved)

export (ES1:reserved, ES2015)

extends (ES1:reserved, ES2015)

false (ES1(BooleanLiteral))

final (ES2:reserved)

finally (ES1:reserved, ES3)

float (ES2:reserved)

for (ES1)

function (ES1)

goto (ES2:reserved)

if (ES1)

import (ES1:reserved, ES2015)

implements (ES2:reserved)

instanceof (ES2:reserved, ES5)

let `(ES5:reserved in strict)

long (ES2:reserved)

native (ES2:reserved)

new (ES1)

null (ES1(NullLiteral))

package (ES5:reserved in strict)

private (ES2:reserved)

protected (ES2:reserved)

public (ES2:reserved)

return (ES1)

short (ES2:reserved)

static (ES2:reserved)

super (ES1:reserved, ES2015)

switch (ES1:reserved, ES3)

synchronized (ES2:reserved)

throw (ES1:reserved, ES3)

throws (ES2:reserved)

transient (ES2:reserved)

true (ES1(BooleanLiteral))

try (ES1:reserved, ES3)

typeof (ES1)

var (ES1)

void (ES1)

volatile (ES2:reserved)

while (ES1)

with (ES1)

yield (ES5:reserved in strict, ES2015)