精简JavaScript IF Else

Question

我有JavaScript的简写版本if else函数，并且我想知道如果其他情况正常，它将如何显示：

var criteriaField = criteria.hasOwnProperty('searchTerm') ? 'name': 'price';

Answer 1

It would look like this:

var criteriaField;
if (criteria.hasOwnProperty('searchTerm')) {
  criteriaField = 'name';
} else {
  criteriaField = 'price';
}

You should read more about the ternary operator ( ? ) here .

Answer 2

if (criteria.hasOwnProperty('searchTerm')) var criteriaField = 'name';
else var criteriaField = 'price';

Answer 3

The term before the ? operator is the condition, followed by the value if the condition evaluates to true, and then to false. SO, as an if-else statement, it could be written as:

var criteriaField;
if (criteria.hasOwnProperty('searchTerm')) {
    criteriaField = 'name';
} else{
    criteriaField = 'price';
}