Rendering to JS with Jinja produces invalid number rather than string
Solution 1:
The problem is that
{{ '1.1.1.1' }}
renders as
1.1.1.1
Quotes are not included. JavaScript tries to parse this as a number and can't. Fortunately, Flask includes a Jinja filter for this.
var tmp = {{ value|tojson }};
tojson will include quotes around strings and omit them for numeric values. The filtered value, when rendered by Jinja, is valid JavaScript with the correct type.