JavaScript API

Compile, Link, And Runtime Errors

CompileError, LinkError, RuntimeError, validation errors, import errors, memory errors, traps, and type mismatches.

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`CompileError` means the bytes could not be compiled. `LinkError` usually means imports do not match. `RuntimeError` is thrown for traps during execution.

Common validation errors include type mismatch, malformed section, bad index, invalid branch depth, and unsupported feature.
Common traps include `unreachable`, divide-by-zero, integer overflow conversion, out-of-bounds memory, and call_indirect type mismatch.
Browser messages vary, so tools should show the original message plus structured context where available.

References

MDN JavaScript interface