How to execute a JavaScript function when I have its name as a string

named-js-functions.js

// see also https://stackoverflow.com/questions/359788/how-to-execute-a-javascript-function-when-i-have-its-name-as-a-string

window.example = function () { alert('hello world'); };

//or
name = 'example';
window[name] = function () { alert('hello world'); };

//or
window[name] = new Function( 'alert("hello world")' );

//and finally call the function
example();