Question

在一个很长的函数中，我需要在继续编写脚本之前获取用户选项。

这个想法是用这样的东西得到选择的值（'a'或'b'）：

function myMainFct {

  // a lot of lines here

    if(a_Defined_Value_Is_Ok) { var option="a"; }

    else {
      var choose = "<a onclick=\"myOption('a')\">A</a><a onclick=\"myOption('b')\">B</a>";
      // here I put the <a> choices in a div

        // now the subfunction
        function myOption(x) { return x; }

        // what will happen when I'll get the value
        if (x)  { var option=x; }
    }

    if (option=="a") {
      // let's continue the script for users with "a" option
    }

    else if (option=="b") {
      // let's continue the script for those with "b" option
    }

    // end of common main function
}

Answer 1

符合您的语法：

var x = (function myOption(x) { return x; })();

Answer 2

您需要将选项处理代码放在单独的函数中。

function myMainFct {

  //  a lot of lines here

  if(a_Defined_Value_IsOk) 
    myCompletion("a");

  else {
    var choose = "<a onclick=\"myCompletion('a')\">A</a><a onclick=\"myCompletion('b')\">B</a>";
    // here I put the <a> choices in a div

  }
  // end of common main function
}

function myCompletion(option) {

  if (option=="a") { 
    // let's continue the script for users with "a" option
  }

  else if (option=="b") {
    // let's continue the script for those with "b" option
  }

}

Answer 3

我终于找到了另一个解决方案。它不是最好的，但它有效。

function myOption(x) { myMainFct(x); } // return to main function when called

function myMainFct(x) {

  // a lot of lines here

  if(a_Defined_Value_Is_Ok) { var option="a"; }

  else {
    var choose = "<a onclick=\"myOption('a')\">A</a><a onclick=\"myOption('b')\">B</a>";
    // here I put the <a> choices in a div

    if (x)  { var option=x; }
  }

  if (option=="a") {
    // let's continue the script for users with "a" option
  }

  else if (option=="b") {
    // let's continue the script for those with "b" option
  }

  // end of common main function
}

Javascript调用一个子函数并从函数内部返回

3 个答案: