Load a JavaScript file dynamically and call a function from it

This is how you provide an embed code, which will load a JavaScript file dynamically into the website and call a function from inside the file with externally passed params.

<script>
    (function () {
        var params = {}; // If you want to pass anything, to the called function
        var script = document.createElement("script");
        script.type = "text/javascript";
        if (script.readyState) {
            script.onreadystatechange = function () {
                if (script.readyState == "loaded" || script.readyState == "complete") {
                    script.onreadystatechange = null;
                    theFunctionInsideExternalScript(params);
                }
            }
        } else {
            script.onload = function () {
                theFunctionInsideExternalScript(params);
            }
        }
        script.src = "your-external-script-file.js";
        document.getElementsByTagName("head")[0].appendChild(script)
    })();
</script>

(function () {

var params = {}; // If you want to pass anything, to the called function

var script = document.createElement("script");

script.type = "text/javascript";

if (script.readyState) {

script.onreadystatechange = function () {

if (script.readyState == "loaded" || script.readyState == "complete") {

script.onreadystatechange = null;

theFunctionInsideExternalScript(params);

}

} else {

script.onload = function () {

theFunctionInsideExternalScript(params);

}

script.src = "your-external-script-file.js";

document.getElementsByTagName("head")[0].appendChild(script)

})();

</script>

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