SyntaxError: identifier starts immediately after numeric literal - JavaScript 编辑

Message

SyntaxError: identifier starts immediately after numeric literal (Firefox)
SyntaxError: Unexpected number (Chrome)

Error type

SyntaxError

What went wrong?

变量名叫identifiers，它符合某些规则，而你打破了这些规则！

一个JavaScript标识符必须以字母开头，下划线（_）或美元符号（$）。他们不能以数字开头。只有后续字符可以是数字（0-9）。

Examples

Variable names starting with numeric literals

Variable names can't start with numbers in JavaScript. The following fails:

var 1life = 'foo';
// SyntaxError: identifier starts immediately after numeric literal

var foo = 1life;
// SyntaxError: identifier starts immediately after numeric literal

You will need to rename your variable to avoid the leading number.

var life1 = 'foo';
var foo = life1;

See also

• Lexical grammar
• Variables in the JavaScript Guide