Error: JavaScript generator does not know how to generate code for block type

[Zayn Abbas]

Hi,

I am trying to create custom blocks for my workspace and integrate it with R shiny. This works well for non-custom blocks, however when I create a custom block and hit run I get this error:

Error: JavaScript generator does not know how to generate code for block type. 

Here is my block definition and the function where I run it:

Blockly.Blocks['previous_average_index'] = {

init: function() {

this.appendValueInput("VALUE")

.setCheck("Number")

.appendField("Previous Average Index:");

this.setOutput(true, "Number");

this.setColour(230);

this.setTooltip("Input the Previous Average Index");

this.setHelpUrl("");

}

};

// Define the JavaScript generator code for the custom block

Blockly.JavaScript['previous_average_index'] = function(block) {

console.log("Enter Generator");

// Get the value from the block's input

var value = Blockly.JavaScript.valueToCode(block, 'VALUE', Blockly.JavaScript.ORDER_ATOMIC);

// Output the value as-is, without any additional function

var code = value;

return [code, Blockly.JavaScript.ORDER_NONE];

};

function getWorkspaceCode(workspace) {

// Generate JavaScript code from the workspace

console.log("This is the workspace: " + workspace);

console.log(Blockly.JavaScript.workspaceToCode(workspace));

return Blockly.JavaScript.workspaceToCode(workspace);

}

Any help would be appreciated!

[Christopher Allen]

Hello Zayn,

I am trying to create custom blocks for my workspace and integrate it with R shiny. This works well for non-custom blocks, however when I create a custom block and hit run I get this error:

Error: JavaScript generator does not know how to generate code for block type. 

You should re-read our documentation about how to create custom block generator functions, or see my answer from yesterday to another developer with the same issue.

Best wishes,

Christopher