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Alternatives to escape(string) in JavaScript

When changing to TypeScript I’m not allowed to use escape(string) anymore because it’s deprecated. The reason I still use it is that the alternatives encodeURI and encodeURIComponent give a different results.

JavaScript

I don’t use this for URLs, but for a CSV export.

What are other alternatives that will give me the same result as escape(string)?

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Answer

In EcmaScript spec there is algorithm:

  1. Call ToString(string).
  2. Compute the number of characters in Result(1).
  3. Let R be the empty string.
  4. Let k be 0.
  5. If k equals Result(2), return R.
  6. Get the character at position k within Result(1).
  7. If Result(6) is one of the 69 nonblank ASCII characters ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789 @*_+-./, go to step 14.
  8. Compute the 16-bit unsigned integer that is the Unicode character encoding of Result(6).
  9. If Result(8), is less than 256, go to step 12.
  10. Let S be a string containing six characters “%uwxyz” where wxyz are four hexadecimal digits encoding the value of Result(8).
  11. Go to step 15.
  12. Let S be a string containing three characters “%xy” where xy are two hexadecimal digits encoding the value of Result(8).
  13. Go to step 15.
  14. Let S be a string containing the single character Result(6).
  15. Let R be a new string value computed by concatenating the previous value of R and S.
  16. Increase k by 1.
  17. Go to step 5.

which can be coded like this:

JavaScript
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