Way to add condition on Running a Stage on Azure DevOps Multi stage YAML pipeline

I am trying to implement a multi-stage pipeline in azure devops that is running everytime a push is committed all branches.

But, I would like to skip a certain stage in executing a pipeline stage using condition, given certain branches

Here is the initial script:

jobs:
- job: JOB A
  variables:
    protected_branches: master, main
  condition: containsValue(variables['protected_branches'], variables['Build.SourceBranchName'])

Seems this script is not working

Thank you!

Since variables in Azure DevOps pipelines can only be defined as strings, you should use contains instead of containsValue.

Here is a code sample where I trigger the pipeline from a branch named test-pipeline:

jobs:
- job: Job_A
  variables:
    protected_branches: 'master, main'
  condition: contains(variables['protected_branches'], variables['Build.SourceBranchName'])
  steps:
  - powershell: |
      Write-Host "Will only if source branch is: master or main"

- job: Job_B
  variables:
    protected_branches: 'test-pipeline'
  condition: contains(variables['protected_branches'], variables['Build.SourceBranchName'])
  steps:
  - powershell: |
      Write-Host "Will only if source branch is: test-pipeline"

Output: