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20 lines
351 B
20 lines
351 B
=proto
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duk_bool_t duk_is_undefined(duk_context *ctx, duk_idx_t index);
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=stack
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[ ... val! ... ]
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=summary
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<p>Returns 1 if value at <code>index</code> is either <code>undefined</code>, otherwise
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returns 0. If <code>index</code> is invalid, also returns 0.</p>
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=example
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if (duk_is_undefined(ctx, -3)) {
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/* ... */
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}
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=tags
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stack
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=introduced
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1.0.0
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