未捕获的ReferenceError :(函数）未在HTMLButtonElement.onclick中定义 [英] Uncaught ReferenceError: (function) is not defined at HTMLButtonElement.onclick

问题描述

我有一个搜索表单，我试图让它在页面底部输出结果而不重新加载。

I have a search form where I'm trying to have it output the results at the bottom of the page without reloading.

<form action='' method='post'>
<div id="search-form">      
<input type="text" name="search" class="search-field" id="search" value="" />
<div class="submit-container">
<button type="button" value="" class="submit" id="searchbutton" onclick="searchoutput()" /></button>
            </div>
  </form>
  <br><br>
  <p>Type First Name</p>

我想在点击按钮时使用Ajax调用另一个脚本，在下面显示搜索结果。我一直收到错误：未捕获的ReferenceError：未在HTMLButtonElement.onclick上定义searchoutput

I want the search results to show below when the button is clicked, using Ajax call to another script. I keep getting an error: "Uncaught ReferenceError: searchoutput is not defined at HTMLButtonElement.onclick

这是我的javascript（使用jquery）：

Here is my javascript (using jquery):

$( document ).ready(function() {
function searchoutput() {
     if($(".search-field").val().length > 5) { //only shows results when more than 5 characters have been entered
        var search = $(".search-field").val();
        var update = $(".result");
        var goal = 0;
        $.get("query-include.php" , {search: search, goal: goal})
        .done(function( data ) {
          update.empty();
          update.append(data);
          $(this).remove();
                                });
                                             };
                         } 
  $( ".search-field" ).keydown(function() {
      var update =$(".results");
      update.empty();
                                       });
                             });

我已检查过其他帖子和花了很长时间试图自己解决问题。奇怪的是，如果我为keyup添加一个事件监听器，以便运行与用户类型相同的函数searchoutput：

I have checked other posts and spent a long time trying to get the solution on my own. The odd thing is if I add an event listener for "keyup" in order to run the same function searchoutput as the user types:

var searchfield = document.getElementById("search");
searchfield.addEventListener("keyup", searchoutput);

然后我没有得到ReferenceError并且脚本运行正常..我只得到函数问题按钮点击。

Then I don't get the ReferenceError and the script runs fine.. I only get the function issue on button click.

推荐答案

这是一个范围问题 - searchOutput 已定义在 $（文档）.ready（）函数的范围内。您可以尝试在该代码之前为 searchOutput 声明一个var，然后将其分配给这样的函数：

It's a scoping issue - searchOutput is defined within the scope of the $(document).ready() function. What you could try is to declare a var for searchOutput before that code, then assign it to the function like this:

var searchOutput;
$( document ).ready(function() {
  searchOutput = function () {
   if($(".search-field").val().length > 5) {
   //etc.

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