javascript Google 标签管理器解析错误。主要表达
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Google Tag Manager Parse Error. Primary Expression
提问by Spencer Gallardo
I am trying to save this Custom Javascript Variable within Google Tag Manager and return this error each time:
我试图在 Google 标签管理器中保存这个自定义 Javascript 变量并每次都返回此错误:
Error at line 2, character 4: Parse error. primary expression expected
第 2 行错误,字符 4:解析错误。预期的主要表达
var prodID = function pID() {
return document.querySelector(".no-display > input[name=product]").value;
}();
Can someone help me? I believe I have a primary expression.
有人能帮我吗?我相信我有一个主要的表达。
回答by Spencer Gallardo
To fix the issue in Google tag manger, I simple re wrote the code to be :
为了解决 Google 标签管理器中的问题,我简单地重新编写了代码:
function() {
return document.querySelector(".no-display > input[name=product]").value;
}
回答by ted_zarzeczny
All code in a custom javascript variable should be within function() {}, or you will get this error.
自定义 javascript 变量中的所有代码都应在 function() {} 内,否则您将收到此错误。
Here's the documentation from Google:
这是谷歌的文档:
This field should be a JavaScript function that returns a value using the 'return' statement. If the function does not explicitly return a value, it will return undefined and your container may not behave as expected. Below is an example of this field:
该字段应该是一个使用“return”语句返回值的 JavaScript 函数。如果函数没有显式返回值,它将返回 undefined 并且您的容器可能不会按预期运行。以下是此字段的示例:
function() {
var now = new Date();
return now.getTime();
}