如何在函數外調用此函數？

Question

嗨，我放棄了這個。任何人都可以幫助我或有另一種方式來調用函數？

Answer 1

var stringWord; 
function firstFunction() 
{ 
    stringWord = "Hello World"; 
    secondFunction(); 
} 

function secondFunction() 
    { 
    alert(stringWord); 
    } 

function thirdFunction() 
{ 
    run = setTimeout('secondFunction()' , 5000); 
} 

Answer 2

function firstFunction() 
{ 
    stringWord = "Hello World"; 
    return function secondFunction()//How to call this function in thirdfunction() ?? 
    { 
    alert(stringWord); 
    }; 
} 

secondFunction = firstFunction(); 

function thirdFunction() 
{ 
    run = setTimeout('secondFunction()' , 5000); 
} 

的jsfiddle：http://jsfiddle.net/DRfzc/

Answer 3

試試這個：

function firstFunction() 
     { 
      stringWord = "Hello World"; 
      this.secondFunction = function()//How to call this function in thirdfunction() ?? 
      { 
      alert(stringWord); 
      } 
     } 
     var instand = new firstFunction(); 
     function thirdFunction(){ 
      run = setTimeout('instand.secondFunction()', 5000); 
     } 

希望這有助於。

Answer 4

沒有修改firstFunction()沒有辦法從firstFunction()外部撥打secondFunction()。如果這是可以接受的請繼續閱讀...

方法1：修改firstFunction()一個參考返回secondFunction()：

function firstFunction() { 
    stringWord = "Hello World"; 
    return function secondFunction() { 
    alert(stringWord); 
    } 
} 
// And then call `firstFunction()` in order to use the function it returns: 
function thirdFunction() { 
    run = setTimeout(firstFunction(), 5000); 
} 
// OR 
var secondFunc = firstFunction(); 
function thirdFunction() { 
    run = setTimeout(secondFunc, 5000); 
} 

方法2：有firstFunction()把一個參考secondFunction()在其範圍以外的變量訪問：

var secondFunc; 
function firstFunction() { 
    stringWord = "Hello World"; 
    function secondFunction() { 
    alert(stringWord); 
    } 
    window.secondFunc = secondFunction; // to make a global reference, AND/OR 
    secondFunc = secondFunc; // to update a variable declared in same scope 
          // as firstFunction() 
} 
firstFunction(); 
function thirdFunction() { 
    run = setTimeout(secondFunc, 5000); 
} 

需要注意的是，無論什麼方法，你必須真正呼叫firstFunction()嘗試使用INNE前r功能。