Unknown directive¶

ID: js/unknown-directive
Kind: problem
Security severity: 
Severity: warning
Precision: high
Tags:
   - quality
   - reliability
   - correctness
Query suites:
   - javascript-code-quality.qls
   - javascript-security-and-quality.qls

Click to see the query in the CodeQL repository

If a directive is accidentally misspelled, it will have no effect.

Recommendation¶

Correct the misspelling.

Example¶

The following code snippet shows a function that contains a "usestrict" directive. Most likely, the programmer intended this to be a "use strict" directive, but due to the typo, the function will not execute in strict mode.

function f() {
    "usestrict";
    ...
}

Correct the misspelling by replacing "usestrict" with "use strict".

References¶

Mozilla Developer Network: “use strict”
asm.js: “use asm”

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