The below javascript code can be used to run a callback function only after the script file is fully loaded.
function load_script_file( file_url, callback ) {
var script = document.createElement( "script" )
script.type = "text/javascript";
if(script.readyState) { // If browser(IE) is < 9
script.onreadystatechange = function() {
if ( script.readyState === "loaded" || script.readyState === "complete" ) {
script.onreadystatechange = null;
callback();
}
};
} else {
script.onload = function() {
callback();
};
}
script.src = file_url;
document.getElementsByTagName( "head" )[0].appendChild( script );
}
// load script file and run the callback function
load_script_file('script_file_path', function() {
console.log("Script file is loaded");
});
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