ShadowFunction

Secure and controlable embedded third-party code for your website.

gitbook: https://shadow-function.gitbook.io

Install：

$ npm install shadow-function --save

Test

Running demo：

$ npm start

Simulate the ISV code for security testing under demo/test.js.

Start

ShadowFunction

Simple example：

import { ShadowFunction, ShadowDocument } from 'shadow-function'
new ShadowFunction('console.log(a + b)')({
  a: 1,
  b: 2,
  console
})  // 3

Operational authority configuration：

let shadowFunction
shadowFunction = new ShadowFunction({
Node: [
  'nodeName',
  'nodeType',
  'textContent'
 ],
 Element: [
   'style',
   'onblur',
   'onfocus',
   'onscroll',
   'offsetWidth',
   'offsetHeight',
   'clientWidth',
   'clientHeight',
   'innerText',
   'setAttribute',
   'removeAttribute',
   'createTextNode',
   'addEventListener',
   'getElementsByTagName'
 ],
 HTMLDivElement: []
})
shadowFunction(`
  document.appendChild(document.createElement("div"))
`)({
  document
})

Prototype chain restriction

new ShadowFunction('console.log(a.prototype)')({
  console,
  a: {}
}) // undefined
new ShadowFunction('console.log(a.valueOf.__proto__)')({
  console,
  a: {}
}) // undefined

ShadowDocument

Secure and controllable method of creating nodes.

import { ShadowFunction, ShadowDocument } from 'shadow-function'
new ShadowFunction('console.log(a + b)')({a: 1, b: 2, console})  // 3
let shadowDocumentFn = new ShadowDocument(document.body, '<div>123</div>')
shadowDocumentFn(`
  document.body.append($template.content);
  console.log(document.body.getElementsByTagName("div")[0].innerText)
`)({
  console
})

Safe jsonp

import { jsonp } from 'shadow-function'
jsonp({
  url: "http://suggest.taobao.com/sug?code=utf-8&q=iphoneX"
}).then((data) => {
  console.log("jsonp:", data)
})