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.image {
  background-image: url('original.webp');
}

@media (prefers-reduced-data: reduce) {
  .image {
    background-image: url('compressed.webp');
  }
}

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name: Node CI

on: [push]

jobs:
  build:

    runs-on: ubuntu-18.04

    steps:

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const container = document.querySelector('.listings-container');
const items = container.querySelectorAll('.listing-card-container');

items.forEach(item => {
	const isSold = item.querySelector('.is-sold');
	const isLeased = item.querySelector('.is-leased');
	
	if (isSold || isLeased) {
		item.querySelector('.listing-result__shortlist').click();	
	}

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// I removed everything bar the component with the binds and hopefully I can just point you in the right direction.

// when we look at doctorFormBlocks.map, there's two issues. One being that you're creating a new function instance with your 
// bind every render (which you correctly identified). But two, your map has an arrow function inside it which also results
// a new function instance every render! This would certainly add up. 

// Below is the class as you had it before. The way I would do it is to just make your map an instance method on 
// the component. 
// Before
export default class DoctorsPage extends React.Component {

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// For each image in the dataset, output this object:
// { src: "picture-3.jpg", caption: "Lorem Ipsum Dolor 2<br>Ut enim ad minim veniam, quis nostrud exercitation ullamco<br>2017" }

const data = [
	{
		"title": "Lorem Ipsum Dolor 1",
		"description": "Ut enim ad minim veniam, quis nostrud exercitation ullamco.",
		"year": "2018",
		"images": [
			"picture-1.jpg",

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(function(module, exports, __webpack_require__) {
   "use strict";
   Object.defineProperty(exports, "__esModule", {
      value: true
   });
   exports.someMaths = someMaths;
   var _someFile = __webpack_require__(1);
   var _someFile2 = _interopRequireDefault(_someFile);

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module.exports =
    /******/ (function(modules) { // webpackBootstrap
    /******/   // The module cache
    /******/   var installedModules = {};
    /******/
    /******/   // The require function
    /******/   function __webpack_require__(moduleId) {
    /******/
    /******/      // Check if module is in cache
    /******/      if(installedModules[moduleId]) {

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'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var multiplier = 10;

function someMaths() {
  console.log(multiplier);
  console.log(5 * multiplier);
  console.log(10 * multiplier);

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import babel from 'rollup-plugin-babel';

export default {
    input: './src/index.js',
    output: {
        file: './dist/bundle.rollup.js',
        format: 'cjs'
    },
    plugins: [
        babel({

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const path = require('path');
const webpack = require('webpack');

module.exports = {
    entry: {
        'index.webpack': path.resolve('./src/index.js')
    },
    output: {
        libraryTarget: "umd",
        filename: "bundle.webpack.js",