在我開始之前,我想提一下,我沒有太多關於JavaScript中的promise/deferred對象的經驗。
我試圖實現的是當用戶點擊一個按鈕,它運行多個$.getJSON
請求,處理響應並相應地更新頁面。
我還需要通知用戶時,所有這些請求已經完成,這裏是connect
方法我有它處理我談到的第一部分:
function connect(row) {
return new Promise(function(resolve, reject) {
var trees = $("#selectedTree").val();
var employee_id = row.attr("rel");
var columns = row.children();
var emailColumn = $(columns[1]);
var firstNameColumn = $(columns[2]);
var lastNameColumn = $(columns[3]);
var jobTitleColumn = $(columns[4]);
var statusColumn = $(columns[5]);
var actionsColumn = $(columns[6]);
actionsColumn.html("<span class='spinner'><i class='fa fa-spinner fa-spin'></i></span>");
$.getJSON("functions/connect_with.php", {
employee_id: employee_id,
trees: trees
}, function(response) {
emailColumn.html(response.message.person.email);
actionsColumn.html("<i class='text-success fa fa-check'></i>");
if(response.success) {
firstNameColumn.html(response.message.person.name.givenName);
lastNameColumn.html(response.message.person.name.familyName);
jobTitleColumn.html(response.message.person.employment.title);
}
statusColumn.html("<i class='text-success fa fa-sitemap'></i>");
resolve(true);
});
});
}
這是什麼情況時,用戶單擊所述按鈕:
$("#connectAll").click(function() {
alert("OFF WE GO");
$(this).hide();
var methods = [];
$(".staffMember input:checked").each(function(index, checkbox) {
checkbox = $(checkbox);
var row = checkbox.parents("tr");
methods.push(connect(row));
});
$.when.apply($, methods).then(function() {
alert("WE DID IT MOM");
$("#connectAll").show();
});
});
但是,兩個警報都會立即發送,而不是等待請求完成。我嘗試了其他方法來做到這一點,我似乎無法做到。
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/all – Hackerman
那麼,狗屎。感謝似乎做了伎倆。謝謝! – ThePerplexedOne
真的好鏈接@Hackerman,我不知道 – George