How to way Today date get at Client Script (JST/yyyymmdd)

[user_ms]

I'd like to get today's date using a client script.
If anyone knows how, please let me know.

The conditions are as follows:
・Get in Japan time（JST）
・Get in yyyymmdd format

[kaushal_snow]

Scenario 2: Prevent form submission if the entered date (in JST-normalized format) is in the past.

function onSubmit() {
var value = g_form.getValue('your_date_field');
if (!value) return true;

// Parse 'yyyyMMdd' into JS Date
var year = parseInt(value.substring(0, 4), 10);
var month = parseInt(value.substring(4, 6), 10) - 1;
var day = parseInt(value.substring(6, 8), 10);
var enteredDate = new Date(year, month, day);

var now = new Date();
now.setHours(0, 0, 0, 0);
var jstNow = new Date(now.getTime() + 9 * 60 * 60 * 1000);
jstNow.setHours(0, 0, 0, 0);

if (enteredDate < jstNow) {
g_form.addErrorMessage("The date cannot be in the past (JST).");
return false;
}
return true;
}

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