如果满足条件，如何更改 div 中每个 p 的颜色?

Question

如何更改特定背景颜色

<p class="line3" style="color:green;margin-left:60px">' + SeatsLeft + ' seats left </p>

当其 employee.managerId 大于 19 时。 数据从我的数据库加载。这是我尝试过的，但它不起作用

$.each(employees, function(index, employee) {
var SeatsLeft = 20 - employee.managerId;
$('#employeeList').append('<li>' +
'<img src="js/citybus.png" class="list-icon"/>' +
'<p class="line1">' + employee.firstName + '</p>' +
'<p class="line2">' + difference + '</p>' +
'<p class="line3" style="color:green;margin-left:60px">' + SeatsLeft + ' seats left </p>' +
'<button id="bookSea" class="bubble" data-difference="' + hoursMin + '" data-route="' + employee.firstName + '" data-busnum="' + employee.lastName + '" onclick="bookSeat(this);">' + '<center><img src="js/seat.jpg" style="height:15px;width:15px;"/></center>' + '</button>' +
'<button data-diff="' + hoursMin + '" data-name="' + employee.firstName + '" class="bubble" style="margin-right:30px" onclick="setReminder(this);">' + '<center><img src="js/bell.png" style="height:15px;width:15px;"/></center>' + '</button></li>');
var x = document.getElementsByClassName("line3");
var i;
for (i = 0; i < x.length; i++) {
if (employee.managerId > 19) {
x[i].style.color = "red";
}
}
});

Answer 1

$.each(employees, function(index, employee) {
var SeatsLeft = 20 - employee.managerId;
var color = employee.managerId > 19 ? 'red' : 'green';
$('#employeeList').append('<li>' +
'<img src="js/citybus.png" class="list-icon"/>' +
'<p class="line1">' + employee.firstName + '</p>' +
'<p class="line2">' + difference + '</p>' +
'<p class="line3" style=' "color:' + color + ';margin-left:60px">' + SeatsLeft + ' seats left </p>' +
'<button id="bookSea" class="bubble" data-difference="' + hoursMin + '" data-route="' + employee.firstName + '" data-busnum="' + employee.lastName + '" onclick="bookSeat(this);">' + '<center><img src="js/seat.jpg" style="height:15px;width:15px;"/></center>' + '</button>' +
'<button data-diff="' + hoursMin + '" data-name="' + employee.firstName + '" class="bubble" style="margin-right:30px" onclick="setReminder(this);">' + '<center><img src="js/bell.png" style="height:15px;width:15px;"/></center>' + '</button></li>');    
});

Answer 2

也许你的意思

是

if (SeatsLeft === 0) $(".line3").css("color","red");

或

'<p class="line3" style="color:'+(SeatsLeft===0?"red":"green")+';margin-left:60px">' 
+ SeatsLeft + ' seat'+(SeatsLeft===1?"":"s")+' left </p>'