angular 报Property 'questionList' does not exist on type 'GlobalEventHandlers'.

this.questionList 报错，报Property 'questionList' does not exist on type 'GlobalEventHandlers'.
newobj.onblur = function(){
  element.innerHTML =newobj.value;
  element.className='q_title';
  console.log(this.questionList);
  this.questionList.filter((item, i) =>{item.questionId===qId?item.title=element.innerHTML:item.title;return true});
};

解决办法，

1、this 赋值给变量

let self=this;
newobj.onblur = function(){
  element.innerHTML =newobj.value;
  element.className='q_title';
  console.log(self.questionList);
  self.questionList.filter((item, i) =>{item.questionId===qId?item.title=element.innerHTML:item.title;return true});
};

2、箭头函数

newobj.onblur = () => {
  element.innerHTML =newobj.value;
  element.className='q_title';
  this.questionList.filter((item, i) =>{item.questionId===qId?item.title=element.innerHTML:item.title;return true});
  console.log(this.questionList);
};

 

参考链接  https://www.e-learn.cn/topic/1833370

来源：oschina

链接：https://my.oschina.net/u/3677751/blog/4321300