Javascript 解析一组JSON数组

我有一些这种格式的json数据

    var dataJSON = '[["a","b","0","1"],["c","d","3","4"],["e","f","5","6"],["g","h","7","8"],["i","j","9","10"]]';
document.getElementById("description").innerHTML=dataJSON;

和html：

<div id="description"></div>

Ho只针对每个数组中的第一个值，因此结果可以是a-c-e-g-i

*已编辑

使用JSON.parse和map:

要将其连接到由连字符和空格分隔的字符串中，请执行以下操作：

const str = first.join(" - ");

---

您必须将字符串解析为json对象，并在数组中循环，然后获取数组元素的第一个元素

var dataJSON = '[["a","b","0","1"],["c","d","3","4"],["e","f","5","6"],["g","h","7","8"],["i","j","9","10"]]';

var result = [];

JSON.parse(dataJSON).forEach(function(d){
  result.push(d[0]);
});

console.log(result.join(' - ');

代码示例

var dataJSON = '[["a","b","0","1"],["c","d","3","4"],["e","f","5","6"],["g","h","7","8"],["i","j","9","10"]]';

console.log(JSON.parse(dataJSON).map(item => item[0]));

// ["a", "c", "e", "g", "i"]

JSON.parse dataJSON.map arr=>arr[0]

var dataJSON = '[["a","b","0","1"],["c","d","3","4"],["e","f","5","6"],["g","h","7","8"],["i","j","9","10"]]';

console.log(JSON.parse(dataJSON).map(item => item[0]));

// ["a", "c", "e", "g", "i"]