catta

catta

catta is a simple request client for browser Support Fetch, AJAX, JSONP and even custom your own adapter. 中文文档-请点我

• Dead simple to use
• Uniform options and usage for each adapter
• Support all modern browser (include IE 9+, with comp. version)
• Support auto-detect browser to choice adapter (more detail)
• Custom own adapter
• light weight, core version less then 2 KB (min + gzip)

Browser support

• catta-min.js
  • All modern browser, except IE
  • No any es6+ polyfill, just pure library
• catta-min-comp.js
  • All modern browser, IE 9+
  • Core library with Promise and Object.assign polyfill
  • No Formdata polyfill, send {data: HTMLFormElement} need IE 10+ to work
  • No Global Fetch polyfill, if browser not support this feature, then it will downgrade to AJAX

Recommend to use the pure one, if your project already have those polyfill or no need IE Support.

Usage

Install First

# local install
npm install catta --save

Then import to your project

// With ES6 - *Recommend*
import catta from 'catta';

catta('http://some/url').then(function (res) {
  console.log(res);
});

// With CommonJS
const catta = require('catta');

// or catta.ajax or catta.jsonp or catta.fetch
catta.default('http://some/url').then(function (res) {
  console.log(res);
});

<!-- And also with <script> in HTML - *Not Recommend* -->
<script src="./node_modules/catta/dist/catta-min.js"></script>
<script>
  // or catta.ajax or catta.jsonp or catta.fetch
  catta.default('http://some/url').then(function (res) {
    console.log(res);
  });
</script>

Options

API

  import {ajax, fetch, jsonp, getScript} from 'catta';

  /**
   * make fetch/ajax/jsonp/getScript request
   * @param {string} url - request url
   * @param {Object} options - request options
   * 
   */
  ajax(url, options);

  // fetch request
  fetch(url, options);

  // jsonp request
  jsonp(url, options);

  // getScript 
  getScript(url);

Important Options

	Description	Type	Default	Fetch	AJAX	JSONP
url	request url	string	null	v	v	v
method	request method	string { get , post, put, delete, head }	'get'	v	v	x
data	the data send to server	string/Object/Form Element [3]	{}	v	v	v

Secondary Options

	Description	Type	Default	Fetch	AJAX	JSONP
type	restrict request type	string { fetch, ajax, jsonp, script }	'auto'	—	—	—
timeout	throw timeout error after seconds	number	3	! [1]	v	! [1]
resultType	the type of result	{ text, json, response }	text	v	v	! [2]

v Supported ! Partial Supported × Not Supported

1. Fetch and JSONP request can't be abort, current timeout is just throw timeout error

2. resultType option can't work with jsonp, because the result must be executable javascript code

3. Only support form element with FormData feature

   ​

Special Options

	Property	Description	Type
jsonp	callbackName	set custom callback name	string
fetch	cross	indicate whether request can cross-origin	boolean
ajax	-	-	-

Examples

Simple

import catta from 'catta';

catta('http://some/url').then(function (res) {
  console.log(res);
});

With full Options

import catta from 'catta';

catta('http://some/url', {
  type: 'jsonp',
  data: {
    page: 5,
    count: 20
  },
  timeout: 2,
  credential: false,
  cross: false,
  
  // sp. options
  jsonp: {
      callbackName: 'myCustomJSONP1'
  }
})
.then(res => console.log(res))
.catch(err => console.log(err));

Only use Fetch / AJAX / JSONP

import {fetch} from 'catta';

// only use fetch
fetch('http://some/url', {
  data: {a:1}
}).then(function (res) {
  console.log(res);
});

Custom request headers

import catta from 'catta';

catta('http://some/url', {
  headers: {
    'Content-Type': 'appliction/json'
  }
})
.then(function (res) {
  console.log(res);
});

Overwrite global config

import {globalConfig} from 'catta';

// set global config, it will work for each request
globalConfig({
  timeout: 10
});

Custom adapter

A custom adapter is just an object, that has detector and processor function.This feature is use to make a wrapper to your special request, and let catta to handle it.More detail see mtop adapter example

import {customAdapter} from 'catta';
import mtopAdapter from 'catta/lib/custom/mtop';

// set mtop adapter
customAdapter('mtop', mtopAdapter);

Other notices

• Auto-detect adapter logic
  • Specific options.type
  • Each custom adapter
  • Support fetch ? fetch : ajax

License

MIT License