why?

[yzxnwj]

Blockly.Blocks['setpeople'] = {
init: function() {
this.appendDummyInput()
.appendField("新建")
.appendField(new Blockly.FieldDropdown([["猫","cat"], ["",""], ["",""]]), "people");
this.appendDummyInput()
.appendField("命名为")
.appendField(new Blockly.FieldVariable("my_first_dance"), "peopleName")
.appendField(",位置位于")
.appendField(new Blockly.FieldDropdown([["顶部","top"], ["底部","bttom"], ["中间","center"]]), "location");
this.setPreviousStatement(true, null);
this.setNextStatement(true, null);
this.setColour(0);
this.setTooltip("");
this.setHelpUrl("");
}
};

Blockly.JavaScript['setpeople'] = function(block) {
var dropdown_people = block.getFieldValue('people');
var variable_peoplename = Blockly.JavaScript.variableDB_.getName(block.getFieldValue('peopleName'), Blockly.Variables.NAME_TYPE);
var dropdown_location = block.getFieldValue('location');
var code = 'makeNewDance('+dropdown_people+','+variable_peoplename+','+dropdown_location+')\n';
return code;
};

var runcode='';
$('.run').on('click',function(){
runcode= Blockly.JavaScript.workspaceToCode(workspace)

console.log(runcode)

})

Content unavailable of return

[NeilFraser]

Two things jump out at me.

One, you spelled 'bottom' wrong in your location dropdown options.

Second, the code is probably going to look like this:
makeNewDance(cat,my_first_dance,top)
whereas I'm guessing you probably want this:
makeNewDance("cat", my_first_dance, "top");
If that's the case, then you want this line:
var code = 'makeNewDance("'+dropdown_people+'", '+variable_peoplename+', "'+dropdown_location+'");\n';

There may be more issues, but your bug report doesn't actually say what the problem is, so I'm not sure what we should be looking for.

[RoboErikG]

Please ask for help on our forums, not on the issue tracker. If you've found a bug in Blockly fill out the bug template, but we generally won't debug your code here.