函数调用错误，不知道为什么。的setTimeout（）

Question

我在js文件中调用此函数时收到错误。

    function currentGrassColor(grassArea, color){
         var grassField = $('.'+grassArea+'').find('img');
         setTimeout(function(){grassField.attr('src', 'img/grass'+color+'.png')},1000);
     }

    function currentGrassColor(currentProgram_grassBg, Green);

这就是我得到的错误

  

第4919行的错误col 93意外的令牌punc«;»，预期的punc«{»   /Applications/MAMP/htdocs/company/js/DataContent.js

Answer 1

应该是这样的：

function currentGrassColor(grassArea, color) {
    var grassField = $('.' + grassArea + '').find('img');
    setTimeout(function () {
        grassField.attr('src', 'img/grass' + color + '.png');   // was missing ;
    }, 1000);
}

currentGrassColor(currentProgram_grassBg, Green);               // don't need function here you are calling it, not defining it

专业提示：将代码粘贴到jsfiddle并点击“JSHint”。它会立即突出显示您的所有错误。

Answer 2

首先你缺少一个分号，你也应该把颜色放在引号中（除非绿色是一个变量）

function currentGrassColor(grassArea, color){
     var grassField = $('.'+grassArea+'').find('img');
     setTimeout(function(){
     grassField.attr('src', 'img/grass'+color+'.png');
     },1000);
 }

currentGrassColor(currentProgram_grassBg, "Green");