console.log(listName); //Today
console.log(listName == 'Today'); //false---------it should be true
console.log('Today' == 'Today'); //true
我的预感是，listname可能有一些空白字符？如果==不起作用，但它应该起作用，我肯定===不会起作用。所以尝试调整值:
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listName = "Today ";
listName = listName.trim();
console.log(listName);
console.log(listName == 'Today');
listName = "Today";
listName = listName.trim();
console.log(listName);
console.log(listName == 'Today');
console.log("Trying ===");
listName = "Today ";
listName = listName.trim();
console.log(listName);
console.log(listName === 'Today');
listName = "Today";
listName = listName.trim();
console.log(listName);
console.log(listName === 'Today');