pleroma-fe/src/components/settings_modal/helpers/boolean_setting.js

import Checkbox from 'src/components/checkbox/checkbox.vue'
import Setting from './setting.js'

export default {
  ...Setting,
  props: {
    ...Setting.props,
    indeterminateState: [String, Object],
  },
  components: {
    ...Setting.components,
    Checkbox,
  },
  computed: {
    ...Setting.computed,
    isIndeterminate() {
      return this.visibleState === this.indeterminateState
    },
  },
  methods: {
    ...Setting.methods,
    getValue(e) {
      // Basic tri-state toggle implementation
      if (this.indeterminateState && !e && this.visibleState === true) {
        // If we have indeterminate state, switching from true to false first goes through indeterminate
        return this.indeterminateState
      }
      return e
    },
  },
}