javascript - Unicode code point escapes in regex literals - Javascript

Question

Can this regex literal syntax having Unicode escape sequence syntax,

var regpat= /^[\u0041-\u005A\u0061-\u007A\.\' \-]{2,15}/;

be written using Unicode code point escape syntax(as shown below)?

var regpat= /^[\u{41}-\u{5A}\u{61}-\u{7A}\u{1F4A9}\.\' \-]{2,15}/;

Note: Unicode code point escapes is used to simplify ES5-compatible surrogate pair syntax representing code point value more than FFFF

score 4 · Accepted Answer

是的，根据规范，这现在是一个有效的转义序列，但是为了启用支持，您必须在正则表达式定义中包含新的u标志：

var regpat = /^[\u{41}-\u{5A}\u{61}-\u{7A}\u{1F4A9}\.\' \-]{2,15}/u;
console.log(regpat.test("\u{41}\u{61}}"))

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