Minimal example under Lightning Locker:


<aura:application >
    <p id="special">Look at me! I am so very special!</p>
    <ui:button label="Element.style.color = 'red'" press="{!c.handle1}" />
    <ui:button label="Element.style.setProperty('color', 'green')" press="{!c.handle2}" />


    handle1 : function(c,e,h) {
        document.getElementById('special').style.color = 'red';
    handle2 : function(c,e,h) {
        document.getElementById('special').style.setProperty('color', 'green');

On API 37 with Lightning Locker enabled, both buttons try to set the same style property but only the second one succeeds. The first one silently fails. Now I realize it is not in general great practice to set inline styles using JavaScript when we can use classes instead, a lot of great plugins use these properties to dynamically style elements. For example the "qTip2" jQuery plugin runs into this issue: It is able to add classes and HTML attributes to the elements I select, but it is not successful at adding inline styles.

Given that setting .style.property fails but .style.setProperty() succeeds, can I gather that this is not intended behaviour?


Known issue in the queue - both syntaxes should be supported - will be fixed in Summer'16 but I am not sure exactly when yet.

| improve this answer | |
  • Thanks Doug. I already have a ticket open for this one so if there is a bug# I can attach to it that'd be great. – Charles T Jun 14 '16 at 15:21
  • Case number 13993271 was opened last week for this. – Charles T Jun 14 '16 at 17:51
  • Perfect - the bug is W-3193414 – Doug Chasman Jun 14 '16 at 18:29
  • OK, added. My ticket was originally about qTip2 not working but clearly this issue is at least one root cause. When it is resolved I can go back and try various libraries again and report if any still don't work. – Charles T Jun 14 '16 at 18:34
  • 1
    Hi Doug, as of today I can confirm this is now working in my sandbox. Thanks. – Charles T Jun 22 '16 at 13:02

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