vanjs-org.github.io/assert/code/diff-simple.html at b3c6994aab0bf78fb9d9945f5e5f0fb82f09603a · vanjs-org/vanjs-org.github.io · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🤖</text></svg>">
    <title>Diff App</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
      .row { display: flex; }

      .column {
        width: 500px;
        margin: 2px;
      }

      .column textarea {
        box-sizing: border-box;
        width: 100%;
      }

      .add { background-color: #B5EFDB; }

      .remove {
        background-color: #FFC4C1;
        text-decoration: line-through;
      }
    </style>
  </head>
  <body>
    <script type="text/javascript" src="diff.min.js"></script>
    <script type="text/javascript" src="van-latest.nomodule.min.js"></script>
    <script>
      const {button, div, span, textarea} = van.tags

      const autoGrow = e => {
        e.target.style.height = "5px"
        e.target.style.height = (e.target.scrollHeight + 5) + "px"
      }

      const DiffApp = () => {
        const oldTextDom = textarea({oninput: autoGrow, rows: 1})
        const newTextDom = textarea({oninput: autoGrow, rows: 1})
        const diff = van.state([])
        return div(
          div({class: "row"},
            div({class: "column"}, oldTextDom), div({class: "column"}, newTextDom),
          ),
          div({class: "row"},
            button({onclick: () => diff.val = Diff.diffWords(oldTextDom.value, newTextDom.value)},
              "Diff",
            ),
          ),
          div({class: "row"}, () => div({class: "column", style: "white-space: pre-wrap;"},
            diff.val.map(d => span({class: d.added ? "add" : (d.removed ? "remove" : "")}, d.value)),
          )),
        )
      }

      document.body.appendChild(DiffApp())
    </script>
  </body>
</html>