How can I know the json has been loaded

[Mabbs]

---
layout: default
title: 搜索
---

<h1>搜索</h1>
<!-- HTML elements for search -->
Keyword: <input type="text" id="search-input" placeholder="Search blog posts.."><br>
<ul id="results-container"></ul>

<!-- or without installing anything -->
<script src="https://unpkg.com/simple-jekyll-search@latest/dest/simple-jekyll-search.min.js"></script>
<script>
function GetQueryString(name)
{
     var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
     var r = window.location.search.substr(1).match(reg);
     if(r!=null)return  unescape(r[2]); return null;
}
var mykeyword = GetQueryString("keyword");
var sbox = document.getElementById('search-input');
var status = false;
if(mykeyword !=null && mykeyword.toString().length>1){
     sbox.value = mykeyword;
}
var sjs = SimpleJekyllSearch({
     searchInput: sbox,
     resultsContainer: document.getElementById('results-container'),
     json: 'search.json',
     searchResultTemplate: '<li>{date} - <a href="{{ site.url }}{url}">{title}</a></li><br>',
});
sjs.search(mykeyword)
</script>

Firstly, this is my code, I tried use search function, It can use while I input to console: sjs.search(mykeyword), but this code in script, json may not be load. so how can I know the json has been loaded?

[Mabbs]

I solved the problem:

$(window).bind("load", function () {
     sjs.search(mykeyword);
})

[Mabbs]

I solved the problem:

$(window).bind("load", function () {
     sjs.search(mykeyword);
})

Hallucination

[Funeoz]

You can see your json file in the network tab of your browser's devtools.

[Mabbs]

You can see your json file in the network tab of your browser's devtools.

I mean program how to know,the success function is fake,i can't use callback.