I'm trying to fetch data from this link:
<script type="text/javascript">
$.getJSON('http://api01.notaion.com/?item&id=120001462', function(data) {
});
</script>
I am uncertain whether I need to use a callback=?, and I am unsure about how to handle the data as well. There may be mistakes in my approach that I am not aware of. Any guidance would be appreciated.
The API does not appear to have CORS support, but it does offer JSONP:
$.ajax({
url: 'http://api01.notaion.com/?item&id=120001462',
dataType: 'jsonp'
})
.success(function(data) {
console.log(data);
});
When retrieving data from a different domain, jsonp must be used. Adding callback=? to the URL accomplishes this in jQuery, resulting in the following outcome:
<script type="text/javascript">
$.getJSON('http://api01.notaion.com/?item&id=120001462&callback=?', function(data) {
console.log(data);
console.log(data.item[0].itemId); #prints 120001462
});
</script>
Indeed, utilizing a JSONP call is necessary for this task. If you were to implement it with pure JavaScript, the code would resemble the following:
//establishing a global callback function
function jsonpCallback(jsonObject){
}
function getJSONP(){
var script = document.createElement('script');
script.src = 'http://api01.notaion.com/?item&id=120001462&callback=jsonpCallback';
document.getElementsByTagName('head')[0].appendChild(script);
}
Subsequently, once the function is invoked, your callback function would retrieve the data from the server.
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