Uncaught TypeError: Cannot read properties of undefined (reading 'value')

The Needs Review Queue Bot → tested this issue. It either no longer applies to Drupal core, or fails the Drupal core commit checks. Therefore, this issue status is now "Needs work".

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The issue is resolved in the latest 10.1x dev environment.

latest code

      if (this.region === 'hidden') {
        const pluginSelect =
          typeof this.$pluginSelect.find('option')[0] !== 'undefined'
            ? this.$pluginSelect.find('option')[0].value
            : undefined;
        const value =
          typeof this.defaultPlugin !== 'undefined'
            ? this.defaultPlugin
            : pluginSelect;

        if (typeof value !== 'undefined') {
          if (this.$pluginSelect.length) {
            this.$pluginSelect[0].value = value;
          }
        }
      }

Next steps will be to add a test case.

This issue was fixed in Uncaught TypeError: this.$pluginSelect.find(...)[0] is undefined 🐛 Uncaught TypeError: this.$pluginSelect.find(...)[0] is undefined Fixed .

Added test as requested in #19 🐛 Uncaught TypeError: Cannot read properties of undefined (reading 'value') Needs review .This is up for a review now.

The Needs Review Queue Bot → tested this issue.

While you are making the above changes, we recommend that you convert this patch to a merge request → . Merge requests are preferred over patches. Be sure to hide the old patch files as well. (Converting an issue to a merge request without other contributions to the issue will not receive credit.)

Thanks for proving the issue is fixed @UtKarsh_33