diff options
| -rw-r--r-- | lib/compress.js | 2 | ||||
| -rw-r--r-- | test/compress/nullish.js | 19 |
2 files changed, 21 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js index 7f9a8dd5..93023e19 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -3618,6 +3618,8 @@ merge(Compressor.prototype, { return this.left.is_defined(compressor) && this.right.is_defined(compressor); case "||": return this.left.is_truthy() || this.right.is_defined(compressor); + case "??": + return this.left.is_defined(compressor) || this.right.is_defined(compressor); default: return true; } diff --git a/test/compress/nullish.js b/test/compress/nullish.js index e8f5ad6c..a8526cac 100644 --- a/test/compress/nullish.js +++ b/test/compress/nullish.js @@ -109,3 +109,22 @@ conditional_assignment_4: { expect_stdout: "PASS" node_version: ">=14" } + +issue_4679: { + options = { + comparisons: true, + ie8: true, + } + input: { + var a; + if (void 0 === (undefined ?? a)) + console.log("PASS"); + } + expect: { + var a; + if (void 0 === (undefined ?? a)) + console.log("PASS"); + } + expect_stdout: "PASS" + node_version: ">=14" +} |