@iimm/shared
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shared utils on browser and react env
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# @iimm/shared
[](https://npmjs.org/package/@iimm/shared)
[](https://npmjs.org/package/@iimm/shared)
## Install
```bash
npm install
```
## 导出内容
### nanoid
```typescript
const nanoid: (size?: number = 21) => string
const customNanoidAlphabet: (alpha: string, defaultSize?: number = 21) => ((size?: number = defaultSize) => string)
```
#### file
```typescript
// ===== convert =====
const fileToBase64 = (file: File) => Promise<string>;
const fileToArrayBuffer = (file: File) => Promise<ArrayBuffer>;
const fileToBinaryString = (file: File) => Promise<string>;
const fileToText = (file: File, encoding = 'utf-8') => Promise<string>;
// ==== info =====
const getMimeTypeFromBase64 = (base64Str: string) => mimeType:string;
// ==== download ====
const generateFileDownload = (file: InputFile, fileName = '', extension = '', onDownloadSuccess?: (file: InputFile, fileName: string) => void, onDownloadFail?: (file: InputFile, fileName: string) => void) => void;
```
#### image
```typescript
const isImageMimeType = (type: string) => type.indexOf('image/') === 0;
```
#### url
```typescript
const getFileNameFromUrl = (url = '') => string;
const getFileExtensionFromUrl = (url = '') => string;
```
### isX
```typescript
const isEqual = (a?: any, b?: any) => [ 'number', 'string' ].includes(typeof (a ?? 0))
? a === b
: JSON.stringify(a) === JSON.stringify(b);
const isInArray = (value: any, array: any[]) => {
if (!array || !Array.isArray(array)) return false;
return [ 'number', 'string' ].includes(typeof (value ?? 0))
? array.includes(value)
: array.some(item => isEqual(value, item));
};
const isObject = (value: any) => value !== null && typeof value === 'object';
const isFunction = (value: any) => typeof value === 'function';
const isString = (value: any) => typeof value === 'string';
const isNumber = (value: any) => typeof value === 'number';
const isUndefined = (value: any) => typeof value === 'undefined';
const isBrowser = !!(typeof window !== 'undefined' && window.document && window.document.createElement);
/** 字符串是否是Base64，可以有data前缀，也可以无 */
const isBase64 = (str: string) => {
if (!str) return false;
const re = /^(data:([a-z0-9/+.-])+;base64,)?([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$/;
return re.test(str);
};
```
TODO
## LICENSE
MIT