pre-get

中文文档

fork proxymise, The information related to the "proxymise" execution stack will be lost, and the pre get is tracked, which greatly improves the availability

In addition, pre-get also makes proxy proxy more in line with normal thinking

1.  preget(xx) instanceof Promise // true 
    ;(await preget({a: 1})).a  // 1

2.  preget(xx).finally()  // Proxymise omits the processing of finally, and preget can be used normally

Chainable Promise Proxy.

Lightweight ES6 Proxy for Promises with no additional dependencies. pre-get allows for method and property chaining without need for intermediate then() or await for cleaner and simpler code.

Use

npm i pre-get

const preget = require('pre-get');

// Instead of thens
foo.then(value => value.bar())
  .then(value => value.baz())
  .then(value => value.qux)
  .then(value => console.log(value));

// Instead of awaits
const value1 = await foo;
const value2 = await value1.bar();
const value3 = await value2.baz();
const value4 = await value3.qux;
console.log(value4);

// Use pre-get
const value = await preget(foo).bar().baz().qux;
console.log(value);

Practical Examples

• Fetch and parse JSON
• Amazon DynamoDB get item
• Selenium WebDriverJS and Page Objects

Performance

Proxymised benchmark with 10000 iterations is practically as performant as the non-proxymised one.

node test/benchmark.js 
with proxymise: 3907.582ms
without proxymise: 3762.375ms