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# API Design Guidelines


# Introduction

The PayPal platform is a collection of reusable services that encapsulate well-defined business capabilities. Developers are encouraged to access these capabilities through Application Programming Interfaces (APIs) that enable consistent design patterns and principles. This facilitates a great developer experience and the ability to quickly compose complex business processes by combining multiple, complementary capabilities as building blocks.

PayPal APIs follow the [RESTful][0] architectural style as much as possible. To support our objectives, we have developed a set of rules, standards, and conventions that apply to the design of RESTful APIs. These have been used to help design and maintain hundreds of APIs and have evolved over several years to meet the needs of a wide variety of use cases.

We are sharing these guidelines to help propagate good API design practices in general. We have pulled extensively from the broader community and believe that it is importan

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import React from 'react';

/* Mouse trail adapted from a jQuery Codepen by Bryan C https://codepen.io/bryjch/pen/QEoXwA */

class Point {
  constructor(x, y) {
    this.x = x;
    this.y = y;
    this.lifetime = 0;
  }

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.AccessibleOnly {
  clip: rect(1px 1px 1px 1px); /* IE 6/7 */
  clip: rect(1px, 1px, 1px, 1px);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap; /* added line */
  width: 1px;
}

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alert(1);

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{"lastUpload":"2019-11-15T02:57:28.608Z","extensionVersion":"v3.4.2"}

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{"lastUpload":"2017-05-22T08:10:20.241Z","extensionVersion":"v2.7.0"}

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{"lastUpload":"2017-05-22T08:09:47.313Z","extensionVersion":"v2.7.0"}

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function toDataURL(url) {
    return fetch(url, {
      credentials: 'include',
    })
    .then(response => response.blob())
    .then(blob => new Promise((resolve, reject) => {
        var reader = new FileReader();
        reader.onloadend = () => resolve(reader.result);
        reader.onerror = reject;
        reader.readAsDataURL(blob);

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function addDOMEvent(html_element, event_name, event_function, useCapture) 
{       
  if(html_element.addEventListener) {
    html_element.addEventListener(event_name, event_function, useCapture); //don't need the 'call' trick because in FF everything already works in the right way
    return;
  }
  
  //Internet Explorer
  html_element.attachEvent("on" + event_name, function() { event_function.call(html_element); });                 
} 

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鱼的记忆只有七秒，(七秒)，关于你的记忆只有雨中的九秒，被淋湿，视线模糊了，是雨水