fix(es/minifier): Handle undefined args

Closes #11572

Author: cuyl

crates/swc_ecma_minifier/src/compress/pure/evaluate.rs

@@ -586,8 +586,7 @@ impl Pure<'_> {
         }
 
         if &*method.sym == "toPrecision" {
-            // TODO: handle num.toPrecision(undefined)
-            if args.is_empty() {
+            if args.is_empty() || args[0].expr.is_undefined(self.expr_ctx) {
                 // https://tc39.es/ecma262/multipage/numbers-and-dates.html#sec-number.prototype.toprecision
                 // 2. If precision is undefined, return ! ToString(x).
                 let value = num.value.to_js_string().into();
@@ -636,8 +635,7 @@ impl Pure<'_> {
         }
 
         if &*method.sym == "toExponential" {
-            // TODO: handle num.toExponential(undefined)
-            if args.is_empty() {
+            if args.is_empty() || args[0].expr.is_undefined(self.expr_ctx) {
                 let value = f64_to_exponential(num.value).into();
 
                 self.changed = true;

crates/swc_ecma_minifier/tests/terser/compress/evaluate/number_method_call/config.json

@@ -0,0 +1,3 @@
+{
+    "evaluate": true
+}

crates/swc_ecma_minifier/tests/terser/compress/evaluate/number_method_call/input.js

@@ -0,0 +1,4 @@
+console.log((1.23).toExponential());
+console.log((1.23).toPrecision());
+console.log((1.23).toExponential(undefined));
+console.log((1.23).toPrecision(undefined));

crates/swc_ecma_minifier/tests/terser/compress/evaluate/number_method_call/output.js

@@ -0,0 +1,4 @@
+console.log("1.23e+0");
+console.log("1.23");
+console.log("1.23e+0");
+console.log("1.23");

crates/swc_ecma_minifier/tests/terser/compress/evaluate/number_method_call/output.mangleOnly.js

@@ -0,0 +1,4 @@
+console.log("1.23e+0");
+console.log("1.23");
+console.log("1.23e+0");
+console.log("1.23");

crates/swc_ecma_minifier/tests/terser/compress/evaluate/number_method_call/output.terser.js

@@ -0,0 +1,4 @@
+console.log("1.23e+0");
+console.log("1.23");
+console.log("1.23e+0");
+console.log("1.23");