提交表单时显示的数据会显示片刻，然后消失

Question

我正在尝试创建一个允许用户提交一些数据的计算器（表单），提交后将使用 plotly.js 绘制图表。现在我只是想获取一个示例图（与数据无关）以在提交空表单时呈现。但是，该图会显示一瞬间然后消失。看起来图表在页面刷新后半秒内可见，然后消失。我怎样才能防止这种情况发生？

<html>
<head>
  <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>

</head>
<body>
  <form>
    <button type="submit" onclick="calculate()">Calculate</button><br>
  </form>
  <div id="myDiv"><!-- Plotly chart will be drawn inside this DIV --></div>

</body>

<script>
function calculate(){

  var data = [
    {
      x: ['giraffes', 'orangutans', 'monkeys'],
      y: [20, 14, 23],
      type: 'bar'
    }
  ];

  Plotly.newPlot('myDiv', data);


};
</script>
</html>

Answer 1

将按钮类型从 'submit' 更改为 'button'

function calculate(){

  var data = [
    {
      x: ['giraffes', 'orangutans', 'monkeys'],
      y: [20, 14, 23],
      type: 'bar'
    }
  ];

  Plotly.newPlot('myDiv', data);


};

<html>
<head>
  <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>

</head>
<body>
  <form>
    <button type="button" onclick="calculate()">Calculate</button><br>
  </form>
  <div id="myDiv"><!-- Plotly chart will be drawn inside this DIV --></div>

</body>

<script>

</script>
</html>

See also this question

提交表单时显示的数据会显示片刻，然后消失

Data displayed upon submission of a form is visible for a moment and then disappears

javascript

plotly.js