Bird
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What will be the output of this Flask template code?

medium📝 component behavior Q5 of 15
Flask - Security Best Practices
What will be the output of this Flask template code?
{% autoescape false %}{{ user_input }}{% endautoescape %}

if user_input = '<b>Bold</b>'?
A&lt;b&gt;Bold&lt;/b&gt;
B<b>Bold</b>
C{{ user_input }}
D<b>Bold</b>
Step-by-Step Solution
Solution:

  1. Step 1: Understand autoescape false block

    Inside this block, escaping is disabled, so HTML tags render as actual HTML.

  2. Step 2: Predict output with given input

    The tags will be interpreted by the browser, showing bold text.

  3. Final Answer:

    <b>Bold</b> renders as bold text -> Option D

  4. Quick Check:

    Autoescape false disables escaping = C [OK]
Quick Trick: Use autoescape false to render raw HTML blocks [OK]
Common Mistakes:
MISTAKES
  • Expecting escaped tags inside autoescape false
  • Confusing variable output with literal template code
  • Assuming autoescape false disables rendering

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