I'm trying to implement slds tabs and in order to switch between tabs, I need to change the css classes. However, when I try to add or remove classes from the classList, it gives below error in console:

Refused to run the JavaScript URL because it violates the following Content Security Policy directive: "script-src 'self' 'nonce-3744c145-c1b2-ab4c-c4f2-225fd8e53422' chrome-extension: 'unsafe-inline' 'unsafe-eval' *.canary.lwc.dev *.visualforce.com https://ssl.gstatic.com/accessibility/ https://static.lightning.force.com". Note that 'unsafe-inline' is ignored if either a hash or nonce value is present in the source list.

Below is the code snippet:

        //remove class for already selected tab

I also tried,

`this.template.querySelector('.slds-is-active').className= '';

` Both of these approaches aren't working. Can someone please help me resolve this.

1 Answer 1


we dont need "." when we remove or add the class "slds-is-active"

it should be


here is an example https://developer.salesforce.com/docs/component-library/tools/playground/ycqTBcTN/1/edit

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