encodeURIComponent vs encodeURI: Which One Should You Use?
encodeURI preserves URL structure; encodeURIComponent encodes everything. Learn the difference, when each applies, and common bugs caused by mixing them.
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Tags: encoding, javascript, url
encodeURIComponent vs encodeURI: Which One Should You Use? JavaScript gives you two encoding functions that look similar but behave very differently. Using the wrong one is one of the most common URL bugs in JavaScript code — it is silent, looks correct, but produces broken behavior in specific cases. This post explains exactly what each function does and when to use which. What Each Function Encodes The difference comes down to which characters each function leaves unencoded. Characters that neither function encodes (unreserved) Both functions leave these characters alone — they are safe everywhere in a URL: Characters that leaves alone but encodes This is the key difference. does not encode these characters because they have structural meaning in URLs: Plus some legacy characters it…
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