feat(helper): add shared export

tools/helper/package.json

@@ -29,6 +29,7 @@
     "./client": "./lib/client/index.js",
     "./client/*": "./lib/client/*",
     "./node": "./lib/node/index.js",
+    "./shared": "./lib/shared/index.js",
     "./noopComponent": "./lib/client/noopComponent.js",
     "./noopModule": "./lib/client/noopModule.js",
     "./package.json": "./package.json"

tools/helper/src/shared/helper.ts

@@ -1,15 +1,11 @@
-export { isPlainObject } from 'vuepress/shared'
+import { isString } from 'vuepress/shared'
 
 /* Type helper */
 export const isDef = <T = any>(val?: T | undefined): val is T =>
   typeof val !== 'undefined'
 export const isBoolean = (val: any): val is boolean => typeof val === 'boolean'
 export const isNumber = (val: any): val is number => typeof val === 'number'
-export const isString = (val: unknown): val is string => typeof val === 'string'
 export const isArray = Array.isArray
-// eslint-disable-next-line @typescript-eslint/ban-types
-export const isFunction = <T extends Function>(val: any): val is T =>
-  typeof val === 'function'
 export const isRegExp = (val: unknown): val is RegExp => val instanceof RegExp
 
 /* String helper */

tools/helper/src/shared/index.ts

@@ -1,3 +1,4 @@
+export * from 'vuepress/shared'
 export * from './date.js'
 export * from './helper.js'
 export * from './url.js'