添加'test'函数后报错Uncaught TypeError: ".goal_test".click不是函数求帮助

Hey there! Let's get this sorted out for you. That error is popping up because you're trying to call the .click() method directly on a string (".goal_test")—and strings don't have a click() method! This method belongs to actual DOM elements (or jQuery objects), not plain text.

Here's how to fix it: #

First, you need to grab the actual DOM element with the class goal_test before trying to trigger a click or bind an event to it. Here are two common approaches:

1. Using Native JavaScript

Use document.querySelector() to fetch the element first, then work with it:

// Get the element from the DOM
const goalTestElement = document.querySelector('.goal_test');

// Make sure the element exists before trying to use it (avoids null errors)
if (goalTestElement) {
  // Trigger a click
  goalTestElement.click();

  // Or if you're binding your 'test' function as the click handler:
  goalTestElement.addEventListener('click', test);
}

2. Using jQuery (if you're using it in your project)

If jQuery is included in your code, wrap the selector in $() to create a jQuery object, then use .click():

// Trigger a click
$('.goal_test').click();

// Or bind your 'test' function as the click handler:
$('.goal_test').click(test);

Quick Checks to Avoid Future Issues: #

• Double-check that your HTML has an element with the exact class goal_test (no typos like hyphens instead of underscores!).
• Make sure your JavaScript runs after the DOM has loaded—either put your script at the end of the <body> tag, or wrap your code in a DOMContentLoaded listener:

  document.addEventListener('DOMContentLoaded', function() {
    // Your code here
  });
  

内容的提问来源于stack exchange，提问作者Malinda