Symptoms

Various issues are possible, for example, the drop-down menu is not clickable, etc.

Impact

The web application does not function as expected.

Conditions

Web application code that uses native removeEventListener() function indirectly.

Workaround

Use a custom iRule. In the following example, replace '/PATH_TO_HTML_FILE' with the actual path of the web application: # # Custom workaround replace wrappers for # addEventListener and removeEventListener with # pass-through wrappers # # v1. very simple # when REWRITE_REQUEST_DONE { if { [HTTP::path] ends_with "/PATH_TO_HTML_FILE" } { # log "URI=([HTTP::path])" # Found the file to modify REWRITE::post_process 1 set do_it 1 } } when REWRITE_RESPONSE_DONE { if {[info exists do_it]} { unset do_it set str {<script>try} set strlen [string length $str] set strt [string first $str [REWRITE::payload]] if {$strt > 0} { REWRITE::payload replace $strt 0 { <script> function F5_Invoke_addEventListener (o, e, h, c) { console.log('addEventListener '+e); var args = []; for (var i = 1; i<arguments.length; i++) { args[i-1] = arguments[i] } return o.addEventListener.apply(o,args); } function F5_Invoke_removeEventListener(o, e, h, c) { console.log('removeEventListener '+e); var args = []; for (var i = 1; i<arguments.length; i++) { args[i-1] = arguments[i] } return o.removeEventListener.apply(o,args); } </script> } } } }

Fix Information

None

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips