问题
I need help for creating the JSON of the dynamicallly created dom objects which has exactly the same format, which was while receiving the JSON to create the dynamic element.
Please check the JS Fiddle link and the source code below. Now, if you see, in the table I'm getting the data through JSON. The checkbox values in the table are JSON objects. When I select any of the checkboxes and click on Save, the corresponding div is generated and displayed.
Now, I want to save this dynamically created DOM structure using the "Save displayed data and create json'" button and also create the JSON which will be of the same format (containg all the properties (irrespective of the fact, whether they were displayed or not in the corresponding parent. for e.g., the phone number, images all the data should be available in the JSON, even it is not displayed but is available in the original JSON).
JS Fiddle
<!doctype html>
<html>
<head>
<style>
table, th, td {
border: 1px solid #ddd;
border-collapse: collapse;
padding: 10px;
}
table {
margin: auto;
}
.parent {
height: 25%;
width: 90%;
padding: 1%;
margin-left: 1%;
margin-top: 1%;
border: 1px solid black;
}
.parent:nth-child(odd){
background: skyblue;
}
.parent:nth-child(even){
background: green;
}
</style>
<body>
<button onclick="createTable()">Load Table</button>
<button onclick="saveData()">Save Table data</button>
<table id="datatable" align="center">
<tr><th>Select</th><th>Name</th><th>DOB</th></tr>
</table>
<br />
<button onclick="createJson()">Save displayed data & create JSON</button>
<br />
<div class="container">
<
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
<script>
function createTable() {
$.getJSON("https://api.randomuser.me/?results=5", function(data) {
// First, clear the table
$('#datatable tr:has(td)').remove();
data.results.forEach(function (record) {
var json = JSON.stringify(record);
$('#datatable').append(
$('<tr>').append(
$('<td>').append(
$('<input>').attr('type', 'checkbox')
.addClass('selectRow')
.val(json)
),
$('<td>').append(
$('<a>').attr('href', record.picture.thumbnail)
.addClass('imgurl')
.attr('target', '_blank')
.text(record.name.first)
),
$('<td>').append(record.dob)
)
);
})
}).fail(function(error) {
console.log("**********AJAX ERROR: " + error);
});
}
function saveData(){
// Scrape the URLs that were already collected into a Set:
var used = new Set($('.myLink').map(function () {
return $(this).attr('href');
}).get());
var errors = [];
$('input.selectRow:checked').each(function(count) {
// Get the JSON that is stored as value for the checkbox
var obj = JSON.parse($(this).val());
// See if this URL was already collected (that's easy with Set)
if (used.has(obj.weburl)) {
errors.push(obj.title);
} else {
// Append it to the collection (use jQuery for appending)
$('.container').append(
$('<div>').addClass('parent').append(
$('<label>').addClass('dataLabel').text('Name: '),
obj.name.first + ' ' + obj.name.last,
$('<br>'), // line-break between name & pic
$('<img>').attr('src', obj.picture.thumbnail), $('<br>'),
$('<label>').addClass('dataLabel').text('Date of birth: '),
obj.dob, $('<br>'),
$('<label>').addClass('dataLabel').text('Address: '), $('<br>'),
obj.location.street, $('<br>'),
obj.location.city + ' ' + obj.location.postcode, $('<br>'),
obj.location.state, $('<br>')
)
);
}
// Clear checkbox:
$('input', this).prop('checked', false)
});
if (errors.length)
alert('The following were already selected:\n' + errors.join('\n'))
}
</script>
</body>
</head>
</html>
Sample JSON
{
"results": [
{
"gender": "male",
"name": {
"title": "mr",
"first": "romain",
"last": "hoogmoed"
},
"location": {
"street": "1861 jan pieterszoon coenstraat",
"city": "maasdriel",
"state": "zeeland",
"postcode": 69217
},
"email": "romain.hoogmoed@example.com",
"login": {
"username": "lazyduck408",
"password": "jokers",
"salt": "UGtRFz4N",
"md5": "6d83a8c084731ee73eb5f9398b923183",
"sha1": "cb21097d8c430f2716538e365447910d90476f6e",
"sha256": "5a9b09c86195b8d8b01ee219d7d9794e2abb6641a2351850c49c309f1fc204a0"
},
"dob": "1983-07-14 07:29:45",
"registered": "2010-09-24 02:10:42",
"phone": "(656)-976-4980",
"cell": "(065)-247-9303",
"id": {
"name": "BSN",
"value": "04242023"
},
"picture": {
"large": "https://randomuser.me/api/portraits/men/83.jpg",
"medium": "https://randomuser.me/api/portraits/med/men/83.jpg",
"thumbnail": "https://randomuser.me/api/portraits/thumb/men/83.jpg"
},
"nat": "NL"
}
],
"info": {
"seed": "2da87e9305069f1d",
"results": 1,
"page": 1,
"version": "1.1"
}
}
回答1:
You could alter your code so that at every save action, you not only add the data to the div, but also to a global variable, in which you would add the exact same data that you have in the checkbox's value attribute.
Then, in another action, you would just need to output that as JSON to where ever you need it (posted to a URL, saved in localStorage, ...).
Here is the code, which has an extra button to output the JSON of the collected items to the console:
function createTable() {
$.getJSON("https://api.randomuser.me/?results=25", function(data) {
$('#datatable tr:has(td)').remove();
data.results.forEach(function (record) {
var json = JSON.stringify(record);
$('#datatable').append(
$('<tr>').append(
$('<td>').append(
$('<input>').attr('type', 'checkbox')
.addClass('selectRow')
.val(json)
),
$('<td>').append(
$('<a>').attr('href', record.picture.thumbnail)
.addClass('imgurl')
.attr('target', '_blank')
.text(record.name.first)
),
$('<td>').append(record.dob)
)
);
})
}).fail(function(error) {
console.log("**********AJAX ERROR: " + error);
});
}
var savedData = new Map; // Keyed by image URL. Start with nothing.
function saveData(){
var errors = [];
// Add selected to map
$('input.selectRow:checked').each(function(count) {
// Get the JSON that is stored as value for the checkbox
var obj = JSON.parse($(this).val());
// See if this URL was already collected (that's easy with Set)
if (savedData.get(obj.picture.thumbnail)) {
errors.push(obj.name.first);
} else {
// Append it to the Map:
savedData.set(obj.picture.thumbnail, obj);
}
});
refreshDisplay();
if (errors.length) {
alert('The following were already selected:\n' + errors.join('\n'));
}
}
function refreshDisplay() {
$('.container').html('');
savedData.forEach(function (obj) {
// Reset container, and append collected data (use jQuery for appending)
$('.container').append(
$('<div>').addClass('parent').append(
$('<label>').addClass('dataLabel').text('Name: '),
obj.name.first + ' ' + obj.name.last,
$('<br>'), // line-break between name & pic
$('<img>').addClass('myLink').attr('src', obj.picture.thumbnail), $('<br>'),
$('<label>').addClass('dataLabel').text('Date of birth: '),
obj.dob, $('<br>'),
$('<label>').addClass('dataLabel').text('Address: '), $('<br>'),
obj.location.street, $('<br>'),
obj.location.city + ' ' + obj.location.postcode, $('<br>'),
obj.location.state, $('<br>'),
$('<button>').addClass('removeMe').text('Delete')
)
);
})
// Clear checkboxes:
$('.selectRow').prop('checked', false);
}
function logSavedData(){
// Translate Map to array of values:
var data = Array.from(savedData, function (pair) {
return pair[1];
});
// Convert to JSON and log to console. You would instead post it
// to some URL, or save it to localStorage.
console.log(JSON.stringify(data, null, 2));
}
$(document).on('click', '.removeMe', function() {
var key = $('.myLink', $(this).parent()).attr('src');
// Delete this from the saved Data
savedData.delete(key);
// And redisplay
refreshDisplay();
});table, th, td {
border: 1px solid #ddd;
border-collapse: collapse;
padding: 10px;
}
.parent {
height: 25%;
width: 90%;
padding: 1%;
margin-left: 1%;
margin-top: 1%;
border: 1px solid black;
}
.parent:nth-child(odd){
background: skyblue;
}
.parent:nth-child(even){
background: green;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button onclick="createTable()">Create Table</button>
<table id="datatable">
<tr><th>Select</th><th>Name</th><th>DOB</th></tr>
</table>
<button onclick="saveData()">Save Selected</button>
<br />
<div class="container"></div>
<button onclick="logSavedData()">Get Saved Data</button>回答2:
I think it would be much more helpful to use jquery datatables for this functionality. You can do many things such as bind JSON from ajax calls directly/per column on the datatable and customize the DOM of the rendered html content. There is also a fileSave function that can export data.
NOTE: Any $('cssselector').Datatable content has to be in Json form.
For more info check out datatables ajax data source and custom buttons extension for datatables - from the API documentation. Using a custom button with an appropriate parseandSaveJson function will do the work you need.
来源：https://stackoverflow.com/questions/43275596/save-the-dynamically-created-dom-and-create-a-json