fix: user supplied prop function detection (#6070)

src/components/calendar/calendar.js

@@ -43,7 +43,7 @@ import {
 } from '../../utils/date'
 import { attemptBlur, attemptFocus, requestAF } from '../../utils/dom'
 import { stopEvent } from '../../utils/events'
-import { isArray, isPlainObject, isString, isUndefined } from '../../utils/inspect'
+import { isArray, isPlainObject, isString } from '../../utils/inspect'
 import { isLocaleRTL } from '../../utils/locale'
 import { mathMax } from '../../utils/math'
 import { toInteger } from '../../utils/number'
@@ -342,20 +342,12 @@ export const BCalendar = Vue.extend({
     },
     computedDateDisabledFn() {
       const { dateDisabledFn } = this
-      let result = null
-      try {
-        result = dateDisabledFn()
-      } catch {}
-      return isUndefined(result) ? () => false : dateDisabledFn
+      return dateDisabledFn.name !== 'default' ? dateDisabledFn : () => false
     },
     // TODO: Change `dateInfoFn` to handle events and notes as well as classes
     computedDateInfoFn() {
       const { dateInfoFn } = this
-      let result = null
-      try {
-        result = dateInfoFn()
-      } catch {}
-      return isUndefined(result) ? () => ({}) : dateInfoFn
+      return dateInfoFn.name !== 'default' ? dateInfoFn : () => ({})
     },
     calendarLocale() {
       // This locale enforces the gregorian calendar (for use in formatter functions)

src/components/form-file/form-file.js

@@ -10,14 +10,7 @@ import { makePropsConfigurable } from '../../utils/config'
 import { closest } from '../../utils/dom'
 import { hasPromiseSupport } from '../../utils/env'
 import { eventOn, eventOff, stopEvent } from '../../utils/events'
-import {
-  isArray,
-  isFile,
-  isFunction,
-  isNull,
-  isUndefined,
-  isUndefinedOrNull
-} from '../../utils/inspect'
+import { isArray, isFile, isFunction, isNull, isUndefinedOrNull } from '../../utils/inspect'
 import { File } from '../../utils/safe-types'
 import { escapeRegExp } from '../../utils/string'
 import { warn } from '../../utils/warn'
@@ -276,11 +269,9 @@ export const BFormFile = /*#__PURE__*/ Vue.extend({
     },
     computedFileNameFormatter() {
       const { fileNameFormatter } = this
-      let result = null
-      try {
-        result = fileNameFormatter()
-      } catch {}
-      return isUndefined(result) ? this.defaultFileNameFormatter : fileNameFormatter
+      return fileNameFormatter.name !== 'default'
+        ? fileNameFormatter
+        : this.defaultFileNameFormatter
     },
     clonedFiles() {
       return cloneDeep(this.files)

src/components/form-spinbutton/form-spinbutton.js

@@ -13,7 +13,7 @@ import { arrayIncludes, concat } from '../../utils/array'
 import { makePropsConfigurable } from '../../utils/config'
 import { attemptBlur, attemptFocus } from '../../utils/dom'
 import { eventOnOff, stopEvent } from '../../utils/events'
-import { isNull, isUndefined } from '../../utils/inspect'
+import { isNull } from '../../utils/inspect'
 import { isLocaleRTL } from '../../utils/locale'
 import { mathFloor, mathMax, mathPow, mathRound } from '../../utils/math'
 import { toFloat, toInteger } from '../../utils/number'
@@ -223,11 +223,7 @@ export const BFormSpinbutton = /*#__PURE__*/ Vue.extend({
     },
     computedFormatter() {
       const { formatterFn } = this
-      let result = null
-      try {
-        result = formatterFn()
-      } catch {}
-      return isUndefined(result) ? this.defaultFormatter : formatterFn
+      return formatterFn.name !== 'default' ? formatterFn : this.defaultFormatter
     },
     computedAttrs() {
       return {

src/components/form-tags/form-tags.js

@@ -21,7 +21,7 @@ import {
 } from '../../utils/dom'
 import { stopEvent } from '../../utils/events'
 import { pick } from '../../utils/object'
-import { isEvent, isNumber, isString, isUndefined } from '../../utils/inspect'
+import { isEvent, isNumber, isString } from '../../utils/inspect'
 import { escapeRegExp, toString, trim, trimLeft } from '../../utils/string'
 import formControlMixin, { props as formControlProps } from '../../mixins/form-control'
 import formSizeMixin, { props as formSizeProps } from '../../mixins/form-size'
@@ -508,11 +508,7 @@ export const BFormTags = /*#__PURE__*/ Vue.extend({
     },
     validateTag(tag) {
       const { tagValidator } = this
-      let result = null
-      try {
-        result = tagValidator()
-      } catch {}
-      return isUndefined(result) ? true : tagValidator(tag)
+      return tagValidator.name !== 'default' ? tagValidator(tag) : true
     },
     getInput() {
       // Returns the input element reference (or null if not found)

src/components/table/helpers/mixin-filtering.js

@@ -5,7 +5,7 @@ import identity from '../../../utils/identity'
 import looseEqual from '../../../utils/loose-equal'
 import { concat } from '../../../utils/array'
 import { makePropsConfigurable } from '../../../utils/config'
-import { isFunction, isString, isRegExp, isUndefined } from '../../../utils/inspect'
+import { isFunction, isString, isRegExp } from '../../../utils/inspect'
 import { toInteger } from '../../../utils/number'
 import { escapeRegExp } from '../../../utils/string'
 import { warn } from '../../../utils/warn'
@@ -83,11 +83,7 @@ export default {
     localFilterFn() {
       // Return `null` to signal to use internal filter function
       const { filterFunction } = this
-      let result = null
-      try {
-        result = filterFunction()
-      } catch {}
-      return isUndefined(result) ? null : filterFunction
+      return filterFunction.name !== 'default' ? filterFunction : null
     },
     // Returns the records in `localItems` that match the filter criteria
     // Returns the original `localItems` array if not sorting

src/mixins/form-text.js

@@ -1,7 +1,6 @@
 import { makePropsConfigurable } from '../utils/config'
 import { attemptBlur, attemptFocus } from '../utils/dom'
 import { stopEvent } from '../utils/events'
-import { isUndefined } from '../utils/inspect'
 import { mathMax } from '../utils/math'
 import { toInteger, toFloat } from '../utils/number'
 import { toString } from '../utils/string'
@@ -113,11 +112,7 @@ export default {
       return mathMax(toInteger(this.debounce, 0), 0)
     },
     hasFormatter() {
-      let result = null
-      try {
-        result = this.formatter()
-      } catch {}
-      return !isUndefined(result)
+      return this.formatter.name !== 'default'
     }
   },
   watch: {