Strict mode Passingnon-Strict mode Passing
Features:
- regexp-named-groups
// Copyright 2017 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- description: If the group doesn't exist, replace with the empty string esid: sec-getsubstitution features: [regexp-named-groups] ---*/ let source = "(?<fst>.)(?<snd>.)|(?<thd>x)"; for (let flags of ["", "u"]) { let re = new RegExp(source, flags); assert.sameValue("cd", "abcd".replace(re, "$<42$1>")); assert.sameValue("cd", "abcd".replace(re, "$<fth>")); assert.sameValue("cd", "abcd".replace(re, "$<$1>")); assert.sameValue("cd", "abcd".replace(re, "$<>")); } for (let flags of ["g", "gu"]) { let re = new RegExp(source, flags); assert.sameValue("", "abcd".replace(re, "$<42$1>")); assert.sameValue("", "abcd".replace(re, "$<fth>")); assert.sameValue("", "abcd".replace(re, "$<$1>")); assert.sameValue("", "abcd".replace(re, "$<>")); }