Question

我在这样的函数中初始化了一个变量matching_id：

if (validation()) {
  matching_rule(sensor, nameE, cond, newVal);
  firing_rule(firingType, matching_id, nameE);
  console.log(matching_id);

  document.getElementById("form1").submit(); //form submission
  alert("Matching_id: "+matching_id[0]+"\nSensor: "+sensor +"\nConditions: "+cond + " \nDevice: "+ dev +"\nNew val: "+newVal+"\n Selected: "+ firingType + "\n Name : " + nameE + " \n Email : " + email + " \n Form Id : " + formID + "\n\n Form Submitted Successfully......");
}

当我在这里尝试访问matching_id时：

function matching_rule(type,name,cond,val){
    var req = '{"dataPredicate":{"'+cond+'": [ {"var": "value.'+type+'"},'+val+']  },"enabled": true,"name": "'+name+'"}';
    req_match.open('POST', url_matching, true);
    req_match.setRequestHeader('Accept', 'application/json');
    req_match.setRequestHeader('Content-type', 'application/json');
    req_match.setRequestHeader('X-API-KEY', kAPI);
    req_match.onreadystatechange = function(){
      console.log(req_match.status);
      if (req_match.status >= 200 && req_match.status < 400) {
        console.log(req_match);
        request_m.onload = req_m; // it's called here
        request_m.open('GET', url_matching, true);
        request_m.setRequestHeader('Accept', 'application/json')
        request_m.setRequestHeader('Content-type', 'application/json')
        request_m.setRequestHeader('X-API-KEY', kAPI)
        request_m.send();
      }else {
        console.log("NOOOOOO MATCHING RULE");
      }
    }
    console.log(req);
    req_match.send(req);
 }

注意：match_rule函数调用req_m函数。我得到了未定义。我无法获取其价值。

编辑：这是调用req_m函数的matching_rule函数。

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javascript使用从函数到函数的变量

0 个答案: