我想知道如何将变量插入地址以读取JSON文件。支持它是这样的。但这不起作用。第一部分有效，但这是一个如何工作的样本。工作部分被称为“workingMarketCap”
<!DOCTYPE html>
<html>
<body>
</body>
<!--============================ SCRIPT ============================ -->
<script>
//Variables
var myRequest = new XMLHttpRequest();
var watchList = ["AAPL", "FB", "GOOGL", "MSFT"];
var urlList = watchList.join(',');
//IEX API requests open and send
myRequest.open ('GET', `https://api.iextrading.com/1.0/stock/market/batch?symbols=${urlList}&types=quote`) //use API function "GET" to recieve data
myRequest.send()
//On the load of the data
myRequest.onload = function(){
var IEXData = JSON.parse(myRequest.responseText); //var IEXData converts JSON response to readable data for this code
readData(IEXData, watchList); //output it into this HTML file
}
/*
=======================
FUNCTIONS
=======================
*/
function readData(data, list) {
for(var i = 0; i < 3; i++) {
var workingMarketCap = data.AAPL.quote.marketCap;
console.log(workingMarketCap);
/* Does not work VVV */
var marketCap = data.`${list[i]}`.quote.marketCap;
console.log(marketCap);
}
}
</script>
</html>