String Replacement
$n |
nth non-passive group |
$2 |
"xyz" in /^(abc(xyz))$/ |
$1 |
"xyz" in /^(?:abc)(xyz)$/ |
$` |
Before matched string |
$' |
After matched string |
$+ |
Last matched string |
$& |
Entire matched string |
Some regex implementations use \ instead of $.
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