你可以把你的函数名放在一个Array对象中，然后调用每个函数对应的数组键来执行它，DEMO:

function captchaTest(msg){
    let x = Math.floor(Math.random()*(21-1)) +1;
    let y = Math.floor(Math.random()*(11-1)) +1;
    let sum = function(){
        return x+y;
    }
    let sub = function(){
        if (y > x){
            let m = y;
            y = x;
            x = m;
            console.log(x,y,m,'--')
        }
        return x-y;
    }
    let mul = function(){
        return x*y;
    } 
    let OParr = [sum(), sub(), mul()]; 
    let OP = Math.floor(Math.random()*OParr.length);      
    let s = OParr[OP]; //!!! HERE !!! is the call as array element
    switch(OP){
        case 0:
            opra = '＋';
            break;
        case 1:
            opra = '━';
            break;
        default:
            opra = '✖';
    }
    let msg2 = 'Answer the following question to continue:'
    let p = prompt(msg+' '+msg2+'\n'+'What is the result of '+x+opra+y+' ?','')
    console.log(s,p,OP)
    if (s == p){
        alert ('Wow, Correct Answer!')
        return true;
    }
    else{
        alert('Sorry, the answer is not correct!')
        return false;
    }
}

谢谢你非常有用的回答。我在我的项目中使用了Jason Bunting的功能。

我扩展了它，使用一个可选的超时，因为设置超时的正常方式不会工作。请看abhishekisnot的问题

function executeFunctionByName(functionName, context, timeout /*, args */ ) { var args = Array.prototype.slice.call(arguments, 3); var namespaces = functionName.split("."); var func = namespaces.pop(); for (var i = 0; i < namespaces.length; i++) { context = context[namespaces[i]]; } var timeoutID = setTimeout( function(){ context[func].apply(context, args)}, timeout ); return timeoutID; } var _very = { _deeply: { _defined: { _function: function(num1, num2) { console.log("Execution _very _deeply _defined _function : ", num1, num2); } } } } console.log('now wait') executeFunctionByName("_very._deeply._defined._function", window, 2000, 40, 50 );

最简单的方法是像has元素一样访问它

window.ClientSideValidations.forms.location_form

和

window.ClientSideValidations.forms['location_form']

关于杰森和亚历克斯的帖子还有一个细节。我发现向上下文添加默认值很有帮助。只要写上context = context == undefined?窗口:上下文;在函数的开始。您可以将window更改为您首选的上下文，这样您就不需要每次在默认上下文中调用this时都传入相同的变量。

你也可以在eval("functionname as string")中调用javascript函数。(eval是纯javascript函数)

function testfunc(){
    return "hello world";
}

$( document ).ready(function() {

     $("div").html(eval("testfunc"));
});

工作示例:https://jsfiddle.net/suatatan/24ms0fna/4/

  let t0 = () => { alert('red0') }
  var t1 = () =>{ alert('red1') }
  var t2 = () =>{ alert('red2') }
  var t3 = () =>{ alert('red3') }
  var t4 = () =>{ alert('red4') }
  var t5 = () =>{ alert('red5') }
  var t6 = () =>{ alert('red6') }

  function getSelection(type) {
    var evalSelection = {
      'title0': t0,
      'title1': t1,
      'title2': t2,
      'title3': t3,
      'title4': t4,
      'title5': t5,
      'title6': t6,
      'default': function() {
        return 'Default';
      }
    };
    return (evalSelection[type] || evalSelection['default'])();
  }
  getSelection('title1');

一个更面向对象的解决方案…