htmlで入力したり行を追加したり削除したりできるtableを作る

# htmlで入力したり行を追加したり削除したりできるtableを作る
htmlでtableに入力したいってことがよくあるので作った
[ここにソース置いてます](https://github.com/takashiAg/special_table)

#demo
![table.gif](https://qiita-image-store.s3.amazonaws.com/0/195504/b20e2b1f-b862-6645-7d6f-eb48526d9d8c.gif)

# requirement
- 行を削除したりできる
- 行を追加できる
- bootstrapとかに依存しない
- コピペで汎用的に使える
- 入力ができる。

#ソース全体
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.0/css/all.css"
          integrity="sha384-aOkxzJ5uQz7WBObEZcHvV5JvRW3TUc2rNPA7pe3AwnsUohiw1Vj2Rgx2KSOkF5+h" crossorigin="anonymous">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
          integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
            integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
            crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"
            integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
            crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"
            integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
            crossorigin="anonymous"></script>

    <script>
        function get_data_from_table() {
            let data = []
            Array.prototype.forEach.call(document.querySelectorAll("table#target>tbody>tr"), (e) => {
                if (e.classList.contains("hide"))
                    return;
                if (e.classList.contains("add_row"))
                    return;

                let row = []
                Array.prototype.forEach.call(e.querySelectorAll("td>input"), (txt) => {
                    row.push(txt.value)
                })
                data.push(row)
            })
            return data
        }
    </script>
    <style>
        .hide {
            display: none;
        }
    </style>
</head>
<body>
<table class="table table-striped" id="target">
    <thead>
    <tr>
        <th scope="row">key</th>
        <th>value</th>
        <th>delete</th>
    </tr>
    </thead>
    <tbody id="params">

    <tr class="add_row"
        onclick="let node=this.nextElementSibling.cloneNode(true);node.removeAttribute('id');node.classList.remove('hide');this.parentNode.insertBefore(node,this)">
        <td colspan="3" style="text-align: center"><i class="fas fa-plus"></i></td>
    </tr>

    <!--template-->
    <tr class="hide">
        <td><input style="width: 100%;outline: 0;border: 0px;background: transparent;"></td>
        <td><input style="width: 100%;outline: 0;border: 0px;background: transparent;"></td>
        <td onclick="this.parentNode.outerHTML = ''"><i class="fas fa-ban"></i></td>
    </tr>
    </tbody>
</table>
</body>
</html>
```


#最低限必要なもの
``get_data_from_table（）``を呼び出すとテーブルからデータを読み込んで配列で返します

```javascript
function get_data_from_table() {
    let data = []
    Array.prototype.forEach.call(document.querySelectorAll("table#target>tbody>tr"), (e) => {
        if (e.classList.contains("hide"))
            return;
        if (e.classList.contains("add_row"))
            return;

        let row = []
        Array.prototype.forEach.call(e.querySelectorAll("td>input"), (txt) => {
            row.push(txt.value)
        })
        data.push(row)
    })
    return data
}
```
```css
    .hide {
       display: none;
    }
```
```html
<table id="target">
    <thead>
    <tr>
        <th scope="row">key</th>
        <th>value</th>
        <th>delete</th>
    </tr>
    </thead>
    <tbody id="params">

    <tr class="add_row"
        onclick="let node=this.nextElementSibling.cloneNode(true);node.removeAttribute('id');node.classList.remove('hide');this.parentNode.insertBefore(node,this)">
        <td colspan="3" style="text-align: center"><i class="fas fa-plus"></i></td>
    </tr>

    <!--template-->
    <tr class="hide">
        <td><input style="width: 100%;outline: 0;border: 0px;background: transparent;"></td>
        <td><input style="width: 100%;outline: 0;border: 0px;background: transparent;"></td>
        <td onclick="this.parentNode.outerHTML = ''"><i class="fas fa-ban"></i></td>
    </tr>
    </tbody>
</table>
```