如何启动 onclick function 并使其启动另一个 function？
[英]How do I launch an onclick function and make it launch another function?
问题描述
I need to launch an onclick function when someone clicks a button on my site (has the id of "rum_sst_tab") and then launch another function that counts a google conversion ( gtag_report_conversion() ) 
I need to launch an onclick function when someone clicks a button on my site (has the id of "rum_sst_tab") and then launch another function that counts a google conversion ( gtag_report_conversion() )
I've tried some jQuery options for onclick, but they weren't working for me.我已经为 onclick 尝试了一些 jQuery 选项，但它们对我不起作用。 This is a wordpress site, and id that I'm trying to onclick on, is within a WordPress plugin - not sure if that complicates things or not with this.这是一个 wordpress 站点，我正在尝试打开 onclick 的 ID，位于 WordPress 插件中 - 不确定这是否会使事情复杂化。
document.getElementById("rum_sst_tab").onclick = gtag_report_conversion();
This is the other part of code that is connected to the gtag function:这是连接到 gtag function 的代码的另一部分：
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-58161224-5"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'AW-72452xxxx');
</script>
I'm also getting this error in the console:我也在控制台中收到此错误：
(index):1251 Uncaught TypeError: Cannot set property 'onclick' of null
1 个解决方案
解决方案1
-1 2019-10-28 17:33:19
If you try to access the DOM before it has been parsed, getElementById() will return null, so make sure you code is called after that.如果您尝试在解析之前访问 DOM， getElementById()将返回 null，因此请确保在此之后调用您的代码。 Otherwise adding a click event is straightforward...否则添加点击事件很简单......
<!DOCTYPE html>
<html>
<head>
<title>so test</title>
</head>
<body>
<button type="button" id="test-div">click me!</button>
<script>
function testFunc() {
console.log('doing the test!');
}
document.getElementById('test-div').onclick = testFunc;
</script>
</body>
</html>
解决方案2
-1 已采纳 2019-10-28 17:53:29
Correct way to call your function is:调用 function 的正确方法是：
document.getElementById('rum_sst_tab').onclick =
function(){
gtag_report_conversion();
}
(Look: Call a function with the submit button in HTML ) （看： 使用 HTML 中的提交按钮调用 function ）
Note:笔记：
It's recommended you wait 9-10 hours before checking your conversion rates.
(At the final thoughts of https://wpforms.com/how-to-track-form-submissions-as-google-adwords-conversions/ ) （在https://wpforms.com/how-to-track-form-submissions-as-google-adwords-conversions/的最终想法中）
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