jquery延迟触发

function fetchData(url) {
    var deferred = $.Deferred();

    $.ajax({
        url: url,
        method: 'GET'
    }).done(function(data) {
        deferred.resolve(data);
    }).fail(function(jqXHR, textStatus, errorThrown) {
        deferred.reject(errorThrown);
    });

    return deferred.promise();
}

fetchData('https://api.example.com/data')
    .then(function(data) {
        console.log('Data fetched successfully:', data);
    })
    .fail(function(error) {
        console.error('Failed to fetch data:', error);
    });

$.ajax({
    url: url,
    method: 'GET'
}).done(function(data) {
    deferred.resolve(data); // 确保调用resolve方法
}).fail(function(jqXHR, textStatus, errorThrown) {
    deferred.reject(errorThrown); // 确保调用reject方法
});