Is there a more efficient method to achieve the following? Where selected_date is derived from django context as a python date:
<script type="text/javascript">
var selected_year = {{ selected_date|date:"Y" }}
var selected_month = {{ selected_date|date:"m" }} - 1;
var selected_day = {{ selected_date|date:"d"}}
var selected_date = new Date(selected_year, selected_month, selected_day);
alert(selected_date);
</script>
When it comes to working with dates in Python, I've found the isoformat function to be incredibly useful:
var selected_date = new Date("{{ selected_date.isoformat }}")
The given solution could produce an inaccurate date output based on the user's locale settings.
When testing in Firefox console:
>>> n = new Date('2011-01-01');
Date {Fri Dec 31 2010 16:00:00 GMT-0800 (PST)}
It is recommended to provide Year, Month, and Day as integers when creating a Date object.
A custom template filter is used to generate the correct date constructor:
@register.filter(name='jsdate')
def jsdate(d):
"""Converts a Python date object to a JavaScript Date() constructor format."""
try:
return "new Date({0},{1},{2})".format(d.year, d.month - 1, d.day)
except AttributeError:
return 'undefined'
After encountering an issue with Android returning 'Invalid Date' during parsing, I discovered that it appears to be more strict than the desktop Webkit. To resolve this, I switched to using the following method which has proven to be effective:
new Date('{{ talk.start_datetime|date:"D, d M Y H:i:s"}}'),
For more information on JavaScript date parsing, you can refer to the following link: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/parse
When working with dates in JavaScript, it is important to utilize the escapejs filter.
<script type="text/javascript">
var chosenDate = new Date({{ selected_date|escapejs }});
alert(chosenDate);
</script>
Instead of relying on timezone-unaware methods, you have the option to utilize Django's built-in Template Tag widthratio to seamlessly convert Python seconds to JavaScript milliseconds.
new Date({% widthratio selected_date|date:"U" 1 1000 %}
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