When I create a custom-html tag in Google Tagmanager I get this error:
JavaScript Compiler Error Typeform Tag Error at line 11, character 22: This language feature is only supported for ECMASCRIPT6 mode or better: const declaration.
The same error occurs for line 22.
This is my code:
<script>
function formatDate(dt) {
var y = ('00'+dt.getFullYear()).slice(-2);
var m = ('00' + (dt.getMonth()+1)).slice(-2);
var d = ('00' + dt.getDate()).slice(-2);
var h = ('00' + dt.getHours()).slice(-2);
var mm = ('00' + dt.getMinutes()).slice(-2);
return (y + m + d + h + mm);
}
nowDate = formatDate(new Date());
const getAfbItem = `${nowDate}`;
if (!window.dtlpcvCvConf) {
window.dtlpcvCvConf = [];
}
window.dtlpcvCvConf.push({
siteId: "",
commitData: {
pid: "",
amount: "",
mid: "",
u: `${getAfbItem}`,
t:"",
cvinfo:"1.1.1"
}
});
</script>
Please, share your thoughts or any advices, would highly appreciate it! - thanks you in advance.
Template literals (with the `) were introduced in ES6.
Since you are only using it as ${<variable>}, you are probably fine with just <variable>, you don't need to put it in a literal. If it isn't already a string, you can convert it to a string with ""+<variable>.
const and let similarly were introduced in ES6, just replace them with var. They behave slightly differently, but it is fine for most use-cases.
I'm not familiar with GTM, but this is probably a restriction to reach the widest audience possible.