Blockly 不在浏览器中显示任何内容

Question

我想进行块状自定义，但按照在线资源的说明进行操作后，浏览器中没有显示任何内容。

这是示例代码：

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Blockly test</title>
  <!-- core library -->
  <script src="https://unpkg.com/blockly/blockly.min.js"></script>
</head>

<body>
  <div id="editor"></div>
  <xml id="toolbox">
    <block type="controls_if"></block>
    <block type="controls_repeat_ext"></block>
    <block type="logic_compare"></block>
    <block type="math_number"></block>
    <block type="math_arithmetic"></block>
    <block type="text"></block>
    <block type="text_print"></block>
  </xml>

  <script>
    Blockly.Blocks['constant_value'] = {
      init: function () {
        this.appendValueInput('VALUE')
          .setCheck('String')
          .appendField('TEST');
        this.setOutput(true, 'Number');
        this.setColour(160);
        this.setTooltip('Returns number of letters in the provided text.');
        this.setHelpUrl('http://www.w3schools.com/jsref/jsref_length_string.asp');
      }
    }
    var workspacePlayground = Blockly.inject('editor',
      { toolbox: document.getElementById('toolbox') });
  </script>
</body>

</html>

如何显示 Blockly 编辑器？

Answer 1

您的 Blockly 工作区看起来不错。问题是缺少CSS 给编辑器一个高度和宽度，使其可见：

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Blockly test</title>
  <!-- core library -->
  <script src="https://unpkg.com/blockly/blockly.min.js"></script>
  
  <!-- add CSS to give the editor dimensions -->
  <style>
  #editor {
    width: 100%;
    height: 500px;
  }
  </style>
</head>

<body>
  <div id="editor"></div>
  <xml id="toolbox">
    <block type="controls_if"></block>
    <block type="controls_repeat_ext"></block>
    <block type="logic_compare"></block>
    <block type="math_number"></block>
    <block type="math_arithmetic"></block>
    <block type="text"></block>
    <block type="text_print"></block>
  </xml>

  <script>
    Blockly.Blocks['constant_value'] = {
      init: function () {
        this.appendValueInput('VALUE')
          .setCheck('String')
          .appendField('TEST');
        this.setOutput(true, 'Number');
        this.setColour(160);
        this.setTooltip('Returns number of letters in the provided text.');
        this.setHelpUrl('http://www.w3schools.com/jsref/jsref_length_string.asp');
      }
    }
    var workspacePlayground = Blockly.inject('editor',
      { toolbox: document.getElementById('toolbox') });
  </script>
</body>

</html>

我添加的是：

  <style>
  #editor {
    width: 100%;
    height: 500px;
  }
  </style>

Blockly 不在浏览器中显示任何内容

Blockly doesn't show anything in the browser

javascript

electron

blockly

google-blockly