Q
What is the difference between and ?
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A
async preserves the order; defer does not
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B
They are identical
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C
defer runs scripts in document order after the HTML is parsed; async runs each script as soon as it downloads, in any order
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D
defer blocks parsing
Correct Answer:
C. defer runs scripts in document order after the HTML is parsed; async runs each script as soon as it downloads, in any order
Explanation:
Use defer for scripts that depend on each other or on the DOM.
