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Support Article

Header collapses or expands on click of any icon on it



Some icons are placed on a collapsible header. On clicking any of these icons, the header expands or collapses which is not the expected behavior.

Error Messages

Not Applicable

Steps to Reproduce

1. Place any icon in collapsible bar
2. Click it, the layout is expanded if it is in collapsible mode and vice versa.


Root Cause

A defect in Pegasystems’ code or rules. When user clicks on the icon, the target appears as img tag due to which header is expanding or collapsing.


Perform the following local-change: 

In expandHeader API add a check for img tag.

Add below code snippet in UserWorkForm.

try {
if(typeof(pega.u)!="undefined" && typeof(pega.u.d)!= "undefined" ) {
pega.u.d.detachOnload(overrideExpandHeader, true);
pega.u.d.attachOnload(overrideExpandHeader, true);
} else {
pega.util.Event.removeListener(window, "load", overrideExpandHeader);
pega.util.Event.addListener(window, "load", overrideExpandHeader);
} catch(e) { }
function overrideExpandHeader(){
pega.u.d.expandHeader = function (expandElement, event, container){
var target = pega.util.Event.getTarget(event);
if(!target.tagName.match(/^(input|select|textarea|button|a)$/gi)) {
if(target.tagName.toLowerCase() == "i" || target.tagName.toLowerCase() == "img") {
if(target.getAttribute("data-ctl") && target.getAttribute("data-ctl") == "Icon") {
this.loadContainer(expandElement, event, container);
} else {
this.expandIt(expandElement, event);


Published January 31, 2016 - Updated October 8, 2020

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