)]}'
{"id": 6249068542164992, "name": "Joint Iteration", "summary": "A TC39 proposal to synchronise the advancement of multiple iterators, often called zip.", "markdown_fields": [], "blink_components": ["Blink>JavaScript>Language"], "star_count": 61, "search_tags": [], "created": {"by": "olivf@google.com", "when": "2026-01-05 09:03:07.446066"}, "updated": {"by": "olivf@google.com", "when": "2026-08-05 15:09:34.806647"}, "category": "JavaScript", "category_int": 10, "feature_notes": null, "web_feature": "tc39-joint-iteration", "is_official_web_feature": true, "webdx_usecounter_enum": null, "enterprise_feature_categories": [], "enterprise_product_category": 0, "is_releasenotes_content_reviewed": false, "is_releasenotes_publish_ready": false, "stages": [{"id": 5105059895574528, "created": "2026-01-05 09:03:08.073380", "feature_id": 6249068542164992, "stage_type": 220, "display_name": null, "intent_stage": 1, "pm_emails": [], "tl_emails": [], "ux_emails": [], "te_emails": [], "intent_thread_url": null, "announcement_url": null, "experiment_goals": null, "experiment_risks": null, "origin_trial_id": null, "origin_trial_feedback_url": null, "ot_action_requested": false, "ot_approval_buganizer_component": null, "ot_approval_buganizer_custom_field_id": null, "ot_approval_criteria_url": null, "ot_approval_group_email": null, "ot_chromium_trial_name": null, "ot_description": null, "ot_display_name": null, "ot_documentation_url": null, "ot_emails": [], "ot_feedback_submission_url": null, "ot_has_third_party_support": false, "ot_is_critical_trial": false, "ot_is_deprecation_trial": false, "ot_owner_email": null, "ot_requester_email": null, "ot_require_approvals": false, "ot_use_counter_bucket_number": null, "ot_webfeature_use_counter": null, "extensions": [], "experiment_extension_reason": null, "ot_stage_id": null, "finch_url": null, "rollout_milestone": null, "rollout_platforms": [], "rollout_details": null, "rollout_impact": 2, "rollout_stage_plan": null, "enterprise_policies": [], "desktop_first": null, "android_first": null, "ios_first": null, "webview_first": null, "desktop_last": null, "android_last": null, "ios_last": null, "webview_last": null}, {"id": 5134466999779328, "created": "2026-01-05 09:03:08.375873", "feature_id": 6249068542164992, "stage_type": 230, "display_name": null, "intent_stage": 2, "pm_emails": [], "tl_emails": [], "ux_emails": [], "te_emails": [], "intent_thread_url": null, "announcement_url": null, "experiment_goals": null, "experiment_risks": null, "origin_trial_id": null, "origin_trial_feedback_url": null, "ot_action_requested": false, "ot_approval_buganizer_component": null, "ot_approval_buganizer_custom_field_id": null, "ot_approval_criteria_url": null, "ot_approval_group_email": null, "ot_chromium_trial_name": null, "ot_description": null, "ot_display_name": null, "ot_documentation_url": null, "ot_emails": [], "ot_feedback_submission_url": null, "ot_has_third_party_support": false, "ot_is_critical_trial": false, "ot_is_deprecation_trial": false, "ot_owner_email": null, "ot_requester_email": null, "ot_require_approvals": false, "ot_use_counter_bucket_number": null, "ot_webfeature_use_counter": null, "extensions": [], "experiment_extension_reason": null, "ot_stage_id": null, "finch_url": null, "rollout_milestone": null, "rollout_platforms": [], "rollout_details": null, "rollout_impact": 2, "rollout_stage_plan": null, "enterprise_policies": [], "desktop_first": null, "android_first": null, "ios_first": null, "webview_first": null, "desktop_last": null, "android_last": null, "ios_last": null, "webview_last": null}, {"id": 6259659193319424, "created": "2026-01-05 09:03:08.444518", "feature_id": 6249068542164992, "stage_type": 250, "display_name": null, "intent_stage": 3, "pm_emails": [], "tl_emails": [], "ux_emails": [], "te_emails": [], "intent_thread_url": null, "announcement_url": null, "experiment_goals": null, "experiment_risks": null, "origin_trial_id": null, "origin_trial_feedback_url": null, "ot_action_requested": false, "ot_approval_buganizer_component": null, "ot_approval_buganizer_custom_field_id": null, "ot_approval_criteria_url": null, "ot_approval_group_email": null, "ot_chromium_trial_name": null, "ot_description": null, "ot_display_name": null, "ot_documentation_url": null, "ot_emails": [], "ot_feedback_submission_url": null, "ot_has_third_party_support": false, "ot_is_critical_trial": false, "ot_is_deprecation_trial": false, "ot_owner_email": null, "ot_requester_email": null, "ot_require_approvals": false, "ot_use_counter_bucket_number": null, "ot_webfeature_use_counter": null, "extensions": [], "experiment_extension_reason": null, "ot_stage_id": null, "finch_url": null, "rollout_milestone": null, "rollout_platforms": [], "rollout_details": null, "rollout_impact": 2, "rollout_stage_plan": null, "enterprise_policies": [], "desktop_first": null, "android_first": null, "ios_first": null, "webview_first": null, "desktop_last": null, "android_last": null, "ios_last": null, "webview_last": null}, {"id": 4852284309766144, "created": "2026-01-05 09:03:08.549723", "feature_id": 6249068542164992, "stage_type": 260, "display_name": null, "intent_stage": 5, "pm_emails": [], "tl_emails": [], "ux_emails": [], "te_emails": [], "intent_thread_url": "https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6a732f49.01e193cf.3bb5d7.0337.GAE%40google.com", "announcement_url": null, "experiment_goals": null, "experiment_risks": null, "origin_trial_id": null, "origin_trial_feedback_url": null, "ot_action_requested": false, "ot_approval_buganizer_component": null, "ot_approval_buganizer_custom_field_id": null, "ot_approval_criteria_url": null, "ot_approval_group_email": null, "ot_chromium_trial_name": null, "ot_description": null, "ot_display_name": null, "ot_documentation_url": null, "ot_emails": [], "ot_feedback_submission_url": null, "ot_has_third_party_support": false, "ot_is_critical_trial": false, "ot_is_deprecation_trial": false, "ot_owner_email": null, "ot_requester_email": null, "ot_require_approvals": false, "ot_use_counter_bucket_number": null, "ot_webfeature_use_counter": null, "extensions": [], "experiment_extension_reason": null, "ot_stage_id": null, "finch_url": null, "rollout_milestone": null, "rollout_platforms": [], "rollout_details": null, "rollout_impact": 2, "rollout_stage_plan": null, "enterprise_policies": [], "desktop_first": 153, "android_first": 153, "ios_first": null, "webview_first": 153, "desktop_last": null, "android_last": null, "ios_last": null, "webview_last": null}], "accurate_as_of": "2026-07-29 14:43:07.689256", "creator_email": "olivf@google.com", "updater_email": "olivf@google.com", "owner_emails": ["nikolaos@chromium.org", "olivf@google.com"], "editor_emails": [], "cc_emails": [], "spec_mentor_emails": [], "unlisted": false, "deleted": false, "editors": [], "cc_recipients": [], "spec_mentors": [], "creator": "olivf@google.com", "feature_type": "Chromium catches up", "feature_type_int": 1, "intent_stage": "None", "intent_stage_int": 0, "active_stage_id": 4852284309766144, "bug_url": "https://issues.chromium.org/issues/465357675", "launch_bug_url": null, "new_crbug_url": "https://bugs.chromium.org/p/chromium/issues/entry?components=Blink>JavaScript>Language&blocking=465357675&cc=nikolaos@chromium.org,olivf@google.com", "screenshot_links": [], "first_enterprise_notification_milestone": null, "enterprise_impact": 1, "breaking_change": false, "confidential": false, "shipping_year": 2026, "flag_name": null, "finch_name": "V8Flag_js_joint_iteration", "non_finch_justification": null, "ongoing_constraints": null, "rollout_plan": 0, "rollout_plan_displayname": "Will ship enabled for all users", "motivation": null, "devtrial_instructions": null, "activation_risks": null, "measurement": null, "availability_expectation": null, "adoption_expectation": null, "adoption_plan": null, "initial_public_proposal_url": null, "explainer_links": [], "requires_embedder_support": false, "spec_link": "https://github.com/tc39/proposal-joint-iteration", "api_spec": false, "automation_spec": false, "interop_compat_risks": null, "all_platforms": null, "all_platforms_descr": null, "non_oss_deps": null, "anticipated_spec_changes": null, "security_risks": null, "ergonomics_risks": null, "wpt": null, "wpt_descr": null, "webview_risks": null, "devrel_emails": ["devrel-chromestatus-all@google.com"], "debuggability": null, "doc_links": [], "sample_links": [], "prefixed": null, "tags": [], "tag_review": null, "tag_review_status": "Not applicable", "tag_review_status_int": 4, "security_review_status": "Pending", "security_review_status_int": 1, "privacy_review_status": "Pending", "privacy_review_status_int": 1, "security_continuity_id": null, "security_launch_issue_id": null, "updated_display": null, "resources": {"samples": [], "docs": []}, "comments": null, "ff_views": 1, "safari_views": 2, "web_dev_views": 4, "browsers": {"chrome": {"bug": "https://issues.chromium.org/issues/465357675", "blink_components": ["Blink>JavaScript>Language"], "devrel": ["devrel-chromestatus-all@google.com"], "owners": ["nikolaos@chromium.org", "olivf@google.com"], "origintrial": false, "prefixed": null, "flag": false, "status": {"text": "Proposed", "val": 2, "milestone_str": "Proposed"}, "announced": true, "desktop": 153, "android": 153, "webview": 153, "ios": null}, "ff": {"view": {"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2003333", "notes": null, "text": "Shipped/Shipping", "val": 1}}, "safari": {"view": {"url": "https://bugs.webkit.org/show_bug.cgi?id=303246", "notes": null, "text": "In development", "val": 2}}, "webdev": {"view": {"text": "No signals", "val": 4, "url": null, "notes": null}}, "other": {"view": {"text": null, "val": null, "url": null, "notes": null}}}, "standards": {"spec": "https://github.com/tc39/proposal-joint-iteration", "maturity": {"text": "Final published standard: Recommendation, Living Standard, Candidate Recommendation, or similar final form", "short_text": "Published standard", "val": 5}}, "is_released": false, "is_enterprise_feature": false, "experiment_timeline": null, "ai_test_eval_report": null, "ai_test_eval_run_status": null, "ai_test_eval_status_timestamp": null}