// function we want to run
var fnstring = "runMe";
function runMe() {
// do stuff
}实现 fnstring()，在 php 中可以使用 call_user_func()，那么 js 中应该如何做呢？
// function we want to run
var fnstring = "runMe";
switch (fnstring) {
case "functionX": functionX(); break;
case "functionY": functionY(); break;
case "functionZ": functionZ(); break;
case "runMe": runMe(); break;
}// function we want to run
var fnstring = "runMe";
// find object
var fn = window[fnstring];
// is object a function?
if (typeof fn === "function") fn();// function name and parameters to pass
var fnstring = "runMe";
var fnparams = [1, 2, 3];
// find object
var fn = window[fnstring];
// is object a function?
if (typeof fn === "function") fn.apply(null, fnparams);javascript 元编程之如何不使用 eval，通过一个字符串来调用对应的函数
原文：https://www.cnblogs.com/ninkaki/p/14035564.html