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   <script src="https://api.trello.com/1/client.js?key=MY_KEY"></script>

    <script type="text/javascript">
      Trello.authorize({
        name: "My site",
        scope: {
          read: true,
          write: false
        },
        expiration: "never",

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getBoards() {
    return new Promise((resolve, reject) => {
      Trello.get(
        "/members/me/boards/",
        boards => resolve(boards),
        error => reject(new Error(`Getting boards failed: ${error}`))
      );
    });
  }

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      let boards = await trelloData.getBoards();

      boards = await Promise.all(
        boards.map(async board => {
          const lists = await trelloData.getLists(board.id, true);
          board.lists = lists;
          return board;
        })
      );

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const filterCards = (boards, filter) =>
  boards.reduce((result, board) => {
    const cardsResult = board.lists.reduce((cards, list) => {
      if (
        board.closed === false &&
        list.closed === false &&
        (filter.length === 0 ||
          list.name.toLowerCase() === filter.toLowerCase())
      ) {
        return cards.concat(list.cards.filter(card => card.closed === false));

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<form
  name="register"
  data-netlify="true"
  data-netlify-honeypot="sneaky-sneaky"
  onSubmit={handleSubmit}
    >
    <input
      type="text"
      name="email"
      placeholder="Enter your email"

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<input type="hidden" name="form-name" value="register" />
<input name="sneaky-sneaky" />

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 const [email, setEmail] = useState("")

 const handleSubmit = e => {
    fetch("/", {
      method: "POST",
      headers: { "Content-Type": "application/x-www-form-urlencoded" },
      body: formEncode({ "form-name": "register", email: email }),
    })
      .then(() => alert("Success!"))
      .catch(error => alert(error))

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import React, { useState } from "react"

const formEncode = data => {
  return Object.keys(data)
    .map(key => encodeURIComponent(key) + "=" + encodeURIComponent(data[key]))
    .join("&")
}

const RegistrationForm = () => {
  const [email, setEmail] = useState("")

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override func viewDidLoad() {
	super.viewDidLoad()

	contentView.addSubview(collectionView)
	collectionView.topAnchor.constraint(equalTo: self.contentView.topAnchor, constant: 0).isActive = true
	collectionView.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor, constant: 0).isActive = true
	collectionView.leadingAnchor.constraint(equalTo: self.contentView.leadingAnchor, constant: 0).isActive = true
	collectionView.trailingAnchor.constraint(equalTo: self.contentView.trailingAnchor, constant: 0).isActive = true
}

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var itemsPerRow: CGFloat = 3

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
	guard let flow = collectionViewLayout as? UICollectionViewFlowLayout else {
		fatalError("only flow layout is supported")
	}

	let paddingSpace = flow.sectionInset.left + flow.sectionInset.right + (minimumInteritemSpacing * itemsPerRow)
	let availableWidth = collectionView.frame.width - paddingSpace
	let widthPerItem = availableWidth / itemsPerRow