retain_block: { options = {} input: { "use strict"; { let a = "FAIL"; } var a = "PASS"; console.log(a); } expect: { "use strict"; { let a = "FAIL"; } var a = "PASS"; console.log(a); } expect_stdout: "PASS" node_version: ">=4" } retain_catch: { options = { dead_code: true, } input: { "use strict"; try {} catch (a) { let a = "aa"; } } expect: { "use strict"; try {} catch (a) { let a = "aa"; } } expect_stdout: true node_version: ">=4" } if_dead_branch: { options = { conditionals: true, dead_code: true, evaluate: true, } input: { "use strict"; console.log(function() { if (0) { let a = 0; } return typeof a; }()); } expect: { "use strict"; console.log(function() { 0; { let a; } return typeof a; }()); } expect_stdout: "undefined" node_version: ">=4" } merge_vars_1: { options = { merge_vars: true, toplevel: true, } input: { "use strict"; let a = console; console.log(typeof a); var b = typeof a; console.log(b); } expect: { "use strict"; let a = console; console.log(typeof a); var b = typeof a; console.log(b); } expect_stdout: [ "object", "object", ] node_version: ">=4" } merge_vars_2: { options = { inline: true, merge_vars: true, toplevel: true, } input: { "use strict"; var a = 0; (function() { var b = function f() { let c = a && f; c.var += 0; }(); console.log(b); })(1 && --a); } expect: { "use strict"; var a = 0; 1 && --a, b = function f() { let c = a && f; c.var += 0; }(), void console.log(b); var b; } expect_stdout: "undefined" node_version: ">=4" } merge_vars_3: { options = { merge_vars: true, toplevel: true, } input: { "use strict"; { let a = 0; var b = console; console.log(typeof b); } var a = 1; console.log(typeof a); } expect: { "use strict"; { let a = 0; var b = console; console.log(typeof b); } var a = 1; console.log(typeof a); } expect_stdout: [ "object", "number", ] node_version: ">=4" } use_before_init_1: { options = { evaluate: true, reduce_vars: true, toplevel: true, } input: { "use strict"; a = "foo"; let a = "bar"; } expect: { "use strict"; a = "foo"; let a = "bar"; } expect_stdout: true node_version: ">=4" } use_before_init_2: { options = { toplevel: true, unused: true, } input: { "use strict"; try { a = "foo"; } catch (e) { console.log("PASS"); } let a = "bar"; } expect: { "use strict"; try { a = "foo"; } catch (e) { console.log("PASS"); } let a = "bar"; } expect_stdout: "PASS" node_version: ">=4" } use_before_init_3: { options = { side_effects: true, } input: { "use strict"; try { a; } catch (e) { console.log("PASS"); } let a = 42; } expect: { "use strict"; try { a; } catch (e) { console.log("PASS"); } let a = 42; } expect_stdout: "PASS" node_version: ">=4" } use_before_init_4: { options = { reduce_vars: true, } input: { "use strict"; try { console.log(a); } catch (e) { console.log("PASS"); } let a = "FAIL"; } expect: { "use strict"; try { console.log(a); } catch (e) { console.log("PASS"); } let a = "FAIL"; } expect_stdout: "PASS" node_version: ">=4" } collapse_block: { options = { collapse_vars: true, pure_getters: "strict", unsafe: true, } input: { "use strict"; { let a = typeof console; console.log(a); } } expect: { "use strict"; { let a = typeof console; console.log(a); } } expect_stdout: "object" node_version: ">=4" } reduce_block_1: { options = { reduce_vars: true, } input: { "use strict"; { let a = typeof console; console.log(a); } } expect: { "use strict"; { let a = typeof console; console.log(a); } } expect_stdout: "object" node_version: ">=4" } reduce_block_2: { options = { reduce_vars: true, } input: { "use strict"; { let a = typeof console; console.log(a); } console.log(typeof a); } expect: { "use strict"; { let a = typeof console; console.log(a); } console.log(typeof a); } expect_stdout: [ "object", "undefined", ] node_version: ">=4" } reduce_block_2_toplevel: { options = { reduce_vars: true, toplevel: true, } input: { "use strict"; { let a = typeof console; console.log(a); } console.log(typeof a); } expect: { "use strict"; { let a = typeof console; console.log(a); } console.log(typeof a); } expect_stdout: [ "object", "undefined", ] node_version: ">=4" } hoist_props: { options = { hoist_props: true, reduce_vars: true, } input: { "use strict"; { let o = { p: "PASS", }; console.log(o.p); } } expect: { "use strict"; { let o = { p: "PASS", }; console.log(o.p); } } expect_stdout: "PASS" node_version: ">=4" } loop_block_1: { options = { loops: true, } input: { "use strict"; do { let o = console; console.log(typeof o.log); } while (!console); } expect: { "use strict"; do { let o = console; console.log(typeof o.log); } while (!console); } expect_stdout: "function" node_version: ">=4" } loop_block_2: { options = { loops: true, } input: { "use strict"; do { let o = {}; (function() { console.log(typeof this, o.p++); })(); } while (!console); } expect: { "use strict"; do { let o = {}; (function() { console.log(typeof this, o.p++); })(); } while (!console); } expect_stdout: "undefined NaN" node_version: ">=4" } do_continue: { options = { loops: true, } input: { "use strict"; try { do { { let a = 0; continue; } } while ([ A ]); } catch (e) { console.log("PASS"); } } expect: { "use strict"; try { do { let a = 0; continue; } while ([ A ]); } catch (e) { console.log("PASS"); } } expect_stdout: "PASS" node_version: ">=4" } dead_block_after_return: { options = { dead_code: true, } input: { "use strict"; (function(a) { console.log(a); return; { let a = "FAIL"; } })("PASS"); } expect: { "use strict"; (function(a) { console.log(a); return; { let a; } })("PASS"); } expect_stdout: "PASS" node_version: ">=4" } do_if_continue_1: { options = { if_return: true, } input: { "use strict"; do { if (console) { console.log("PASS"); { let a = 0; var b; continue; } } } while (b); } expect: { "use strict"; do { if (!console); else { console.log("PASS"); { let a = 0; var b; } } } while (b); } expect_stdout: "PASS" node_version: ">=4" } do_if_continue_2: { options = { if_return: true, } input: { "use strict"; do { if (console) { console.log("FAIL"); { let a = 0; A = 0; continue; } } } while (A); } expect: { "use strict"; do { if (!console); else { console.log("FAIL"); { let a = 0; A = 0; } } } while (A); } expect_stdout: ReferenceError("A is not defined") node_version: ">=4" } drop_unused: { options = { evaluate: true, side_effects: true, unused: true, } input: { "use strict"; function f(a) { let b = a, c = b; 0 && c.p++; } console.log(f()); } expect: { "use strict"; function f(a) { let b = a; b; } console.log(f()); } expect_stdout: "undefined" node_version: ">=4" } issue_4191: { options = { functions: true, reduce_vars: true, unused: true, } input: { "use strict"; { let a = function() {}; } console.log(typeof a); } expect: { "use strict"; { let a = function() {}; } console.log(typeof a); } expect_stdout: "undefined" node_version: ">=4" } issue_4197: { options = { collapse_vars: true, } input: { "use strict"; var a = 0; try { let b = function() { a = 1; b[1]; }(); } catch (e) { console.log(a); } } expect: { "use strict"; var a = 0; try { let b = function() { a = 1; b[1]; }(); } catch (e) { console.log(a); } } expect_stdout: "1" node_version: ">=4" } issue_4202: { options = { inline: true, toplevel: true, } input: { "use strict"; { let o = {}; (function() { function f() { o.p = 42; } f(f); })(); console.log(o.p++); } } expect: { "use strict"; { let o = {}; (function() { function f() { o.p = 42; } f(f); })(); console.log(o.p++); } } expect_stdout: "42" node_version: ">=4" } issue_4207: { options = { reduce_funcs: true, reduce_vars: true, unused: true, } input: { "use strict"; { let a = function() {}; console.log(a.length); } } expect: { "use strict"; { let a = function() {}; console.log(a.length); } } expect_stdout: "0" node_version: ">=4" } issue_4218: { options = { reduce_funcs: true, reduce_vars: true, toplevel: true, unused: true, } input: { "use strict"; var a; { let a = function() {}; var b = 0 * a; } console.log(typeof a, b); } expect: { "use strict"; var b = 0 * function() {}; console.log(typeof void 0, b); } expect_stdout: "undefined NaN" node_version: ">=4" } issue_4210: { options = { reduce_vars: true, varify: true, } input: { "use strict"; var a; (function() { try { throw 42; } catch (e) { let a = typeof e; console.log(a); } finally { return a = "foo"; } })(); console.log(typeof a); } expect: { "use strict"; var a; (function() { try { throw 42; } catch (e) { let a = typeof e; console.log(a); } finally { return a = "foo"; } })(); console.log(typeof a); } expect_stdout: [ "number", "string", ] node_version: ">=4" } issue_4212_1: { options = { dead_code: true, } input: { "use strict"; console.log({ get b() { let a = 0; return a /= 0; } }.b); } expect: { "use strict"; console.log({ get b() { let a = 0; return a / 0; } }.b); } expect_stdout: "NaN" node_version: ">=4" } issue_4212_2: { options = { reduce_vars: true, } input: { "use strict"; console.log({ get b() { let a = 0; return a /= 0; } }.b); } expect: { "use strict"; console.log({ get b() { let a = 0; return a /= 0; } }.b); } expect_stdout: "NaN" node_version: ">=4" } skip_braces: { beautify = { beautify: true, braces: true, } input: { "use strict"; if (console) let a = console.log(typeof a); } expect_exact: [ '"use strict";', "", "if (console) let a = console.log(typeof a);", ] expect_stdout: true node_version: ">=4" } issue_4225: { options = { side_effects: true, } input: { "use strict"; let a = void typeof b; let b = 42; console.log(a, b); } expect: { "use strict"; let a = void b; let b = 42; console.log(a, b); } expect_stdout: true node_version: ">=4" } issue_4229: { options = { ie8: true, side_effects: true, } input: { "use strict"; try { (function f() { f; let f; })(); } catch (e) { console.log("PASS"); } } expect: { "use strict"; try { (function f() { f; let f; })(); } catch (e) { console.log("PASS"); } } expect_stdout: "PASS" node_version: ">=4" } issue_4231: { options = { ie8: true, side_effects: true, } input: { "use strict"; typeof a == 0; console.log(typeof function a() { let a; }); } expect: { "use strict"; console.log(typeof function a() { let a; }); } expect_stdout: "function" node_version: ">=4" } issue_4245: { options = { booleans: true, } input: { "use strict"; let a = f(); function f() { typeof a; } } expect: { "use strict"; let a = f(); function f() { a, 1; } } expect_stdout: ReferenceError("a is not defined") node_version: ">=4" } issue_4248: { options = { collapse_vars: true, } input: { var a = "FAIL"; try { (function() { "use strict"; a = "PASS"; b[a]; let b; })(); } catch (e) { console.log(a); } } expect: { var a = "FAIL"; try { (function() { "use strict"; a = "PASS"; b[a]; let b; })(); } catch (e) { console.log(a); } } expect_stdout: "PASS" node_version: ">=4" } issue_4274_1: { options = { loops: true, } input: { "use strict"; for (;;) { if (console.log("PASS")) { let a; } else { break; var a; } } } expect: { "use strict"; for (; console.log("PASS");) { { let a; } var a; } } expect_stdout: "PASS" node_version: ">=4" } issue_4274_2: { options = { loops: true, } input: { "use strict"; for (;;) { if (!console.log("PASS")) { break; var a; } else { let a; } } } expect: { "use strict"; for (; console.log("PASS");) { { let a; } var a; } } expect_stdout: "PASS" node_version: ">=4" } issue_4276_1: { options = { unused: true, } input: { "use strict"; try { let a = b, b; console.log("FAIL"); } catch (e) { console.log("PASS"); } } expect: { "use strict"; try { let a = b, b; console.log("FAIL"); } catch (e) { console.log("PASS"); } } expect_stdout: "PASS" node_version: ">=4" } issue_4276_2: { options = { unused: true, } input: { "use strict"; try { let a = f(), b; console.log("FAIL"); function f() { return b; } } catch (e) { console.log("PASS"); } } expect: { "use strict"; try { let a = f(), b; console.log("FAIL"); function f() { return b; } } catch (e) { console.log("PASS"); } } expect_stdout: "PASS" node_version: ">=4" } issue_4290_1: { options = { unused: true, } input: { "use strict"; let a; var a; } expect: { "use strict"; let a; var a; } expect_stdout: true node_version: ">=4" } issue_4290_2: { options = { collapse_vars: true, } input: { "use strict"; try { console.log(function(a) { a = c; let c; return a; }()); } catch (e) { console.log("PASS"); } } expect: { "use strict"; try { console.log(function(a) { a = c; let c; return a; }()); } catch (e) { console.log("PASS"); } } expect_stdout: "PASS" node_version: ">=4" } issue_4305_1: { options = { reduce_vars: true, unused: true, } input: { (function() { let arguments = function() { while (console.log("PASS")); }; arguments(); })(); } expect: { (function() { let arguments = function() { while (console.log("PASS")); }; arguments(); })(); } expect_stdout: true node_version: ">=6" } issue_4305_2: { options = { reduce_vars: true, unused: true, } input: { "use strict"; (function(a) { let a = function() { while (console.log("aaaaa")); }; a(); })(); } expect: { "use strict"; (function(a) { let a = function() { while (console.log("aaaaa")); }; a(); })(); } expect_stdout: true node_version: ">=4" } issue_1753: { mangle = { toplevel: false, webkit: true, } input: { "use strict"; let l = null; for (let i = 0; i < 1; i++) console.log(i); } expect: { "use strict"; let l = null; for (let i = 0; i < 1; i++) console.log(i); } expect_stdout: "0" node_version: ">=4" } issue_1753_toplevel: { mangle = { toplevel: true, webkit: true, } input: { "use strict"; let l = null; for (let i = 0; i < 1; i++) console.log(i); } expect: { "use strict"; let l = null; for (let e = 0; e < 1; e++) console.log(e); } expect_stdout: "0" node_version: ">=4" } issue_4438: { options = { if_return: true, } input: { "use strict"; function f() { if (console) { { let a = console.log; return void a("PASS"); } } } f(); } expect: { "use strict"; function f() { if (!console) ; else { let a = console.log; a("PASS"); } } f(); } expect_stdout: "PASS" node_version: ">=4" }