javascript - 获取引用错误: appearance is not defined

Question

我正在尝试访问 super 英雄 api，但对于某些数据，它一直显示数据未定义。

 var html = "";
$.each(data.results,function(i,results){
html += "<li> first appearance: " + results.biography.first-appearance +"</li>";
// it is not showing anything with a "-" in but the rest are working fine 

 })
 $("#Results").html(html);

Answer 1

就像需要引用带有连字符的对象键一样，当您访问该键时，您需要使用带引号的方括号表示法:

const a = [{ biography: 'a', 'first-appearance': 'b' }];
    
console.log(a[0]['first-appearance'])