143577 2015-04-09 14:21:36 -0700 Web Inspector: breakpoints set in IIFE closures via GUI do not fire 2026-01-12 09:04:03 -0800 1 1 1 Unclassified WebKit Web Inspector 528+ (Nightly build) All All NEW InRadar P2 Normal --- 1 joey webkit-unassigned graouts inspector-bugzilla-changes jonowells webkit-bug-importer oldest_to_newest 1084052 0 joey 2015-04-09 14:21:36 -0700 Occasionally I need to tear into readonly remote-hosted JS code to isolate and report bugs on webapps I use. Single-page-application sites now commonly enclose their entire app code into an IIFE, adding nothing to the global scope that can be probed using the console. (function () { true; }() ) or !function(){ true; }() Web Inspector will let me click to set breakpoints inside IIFEs but they will never fire when the site feature that was breakpointed is engaged. Breakpointing the same lines in Chrome, Opera and Firefox works and provides console access to the stack inside the IIFE closure. It makes no difference whether the script file was minified (and subsequently prettified by Web Inspector) or not. None of the sites I am debugging have source-maps available. The only way I can currently debug such sites on Safari is by saving a WebArchive and manually editing scripts' WebResourceData to insert `debugger;` statements: webarchive-vim is a python script I wrote to streamline this. 1084053 1 webkit-bug-importer 2015-04-09 14:21:55 -0700 <rdar://problem/20488898> 1084055 2 250467 joey 2015-04-09 14:22:49 -0700 Created attachment 250467 script for editing individual resources in webarchives 250467 2015-04-09 14:22:49 -0700 2015-04-09 14:22:49 -0700 script for editing individual resources in webarchives webarchive-vim text/plain 1637 joey IyEvdXNyL2Jpbi9lbnYgcHl0aG9uMwppbXBvcnQgb3MKaW1wb3J0IHN5cwppbXBvcnQgcGxpc3Rs aWIKZnJvbSB0ZW1wZmlsZSBpbXBvcnQgTmFtZWRUZW1wb3JhcnlGaWxlCgppZiBfX25hbWVfXyA9 PSAnX19tYWluX18nOgogICAgdHJ5OgogICAgICAgIHBsaXN0UGF0aCA9IHN5cy5hcmd2WzFdCiAg ICAgICAgd2l0aCBvcGVuKHBsaXN0UGF0aCwgJ3JiJykgYXMgZnA6CiAgICAgICAgICAgIHdlYmFy YyA9IHBsaXN0bGliLmxvYWQoZnApCiAgICBleGNlcHQ6CiAgICAgICAgcHJpbnQoIk5vdCBhIHBs aXN0ISIpCiAgICAgICAgc3lzLmV4aXQoMSkKCiAgICBpZiBsZW4oc3lzLmFyZ3YpIDwgMzoKICAg ICAgICAjbGlzdCBVUkwgYW5kIG51bSBvZiBhbGwgYXNzZXRzIGlmIG5vIGFzc2V0bnVtIHdhcyBn aXZlbgogICAgICAgIHByaW50KCdtYWluOiAnICsgd2ViYXJjWydXZWJNYWluUmVzb3VyY2UnXVsi V2ViUmVzb3VyY2VVUkwiXSkKICAgICAgICBmb3IgaWR4LCBhc3NldCBpbiBlbnVtZXJhdGUod2Vi YXJjWyJXZWJTdWJyZXNvdXJjZXMiXSk6CiAgICAgICAgICAgIHVybCA9IGFzc2V0WyJXZWJSZXNv dXJjZVVSTCJdCiAgICAgICAgICAgIHByaW50KCIlczogJXMiICUgKGlkeCwgdXJsKSkKICAgICAg ICBzeXMuZXhpdCgxKQoKICAgIGlmIHN5cy5hcmd2WzJdLmlzZGlnaXQoKToKICAgICAgICBhc3Nl dE51bSA9IGludChzeXMuYXJndlsyXSkKICAgICAgICBhc3NldCA9IHdlYmFyY1siV2ViU3VicmVz b3VyY2VzIl1bYXNzZXROdW1dCiAgICBlbHNlOgogICAgICAgIGFzc2V0ID0gd2ViYXJjWydXZWJN YWluUmVzb3VyY2UnXQoKICAgIGNvZGUgPSBhc3NldFsiV2ViUmVzb3VyY2VEYXRhIl0KICAgIHRt cCA9IE5hbWVkVGVtcG9yYXJ5RmlsZShkZWxldGU9RmFsc2UpCiAgICBpZiBUcnVlOgogICAgICAg IHRtcC53cml0ZShjb2RlKQogICAgICAgIHRtcC5mbHVzaCgpCiAgICAgICAgI2lmIGFueShtdCA9 PSBhc3NldFsnV2ViUmVzb3VyY2VNSU1FVHlwZSddIGZvciBtdCBpbiBbJ2FwcGxpY2F0aW9uL2ph dmFzY3JpcHQnLCAndGV4dC9odG1sJ10pOgogICAgICAgIGlmIGFzc2V0WydXZWJSZXNvdXJjZU1J TUVUeXBlJ10gPT0gJ2FwcGxpY2F0aW9uL2phdmFzY3JpcHQnOgogICAgICAgICAgICBvcy5zeXN0 ZW0oImpzLWJlYXV0aWZ5IC1yIC1mICVzIiAlIHRtcC5uYW1lKQogICAgICAgIG9zLnN5c3RlbSgi dmltICVzIiAlIHRtcC5uYW1lKSAjdXNlIEVESVRPUj8KICAgICAgICAjb3Muc3lzdGVtKCJvcGVu IC1XICVzIiAlIHRtcC5uYW1lKQoKICAgICAgICAjaGF2ZSB0byBjbG9zZSBhbmQgcmVvcGVuIHRv IHBpY2sgdXAgY2hhbmdlcz8/CiAgICAgICAgdG1wLmNsb3NlKCkKICAgICAgICBuZXdhc3NldCA9 IG9wZW4odG1wLm5hbWUsICdyYicpCiAgICAgICAgbmV3Y29kZSA9IG5ld2Fzc2V0LnJlYWQoKQoK ICAgICAgICBhc3NldFsiV2ViUmVzb3VyY2VEYXRhIl0gPSBwbGlzdGxpYi5EYXRhKG5ld2NvZGUp CiAgICAgICAgd2l0aCBvcGVuKHBsaXN0UGF0aCwgJ3diJykgYXMgZnA6CiAgICAgICAgICAgIHBs aXN0bGliLmR1bXAod2ViYXJjLCBmcCwgZm10PXBsaXN0bGliLkZNVF9CSU5BUlkpCiAgICAgICAg bmV3YXNzZXQuY2xvc2UoKQogICAgb3MudW5saW5rKHRtcC5uYW1lKQo=