E009Error
Missing comma between items
Expected ',' or a closing bracket between two values.
What it means
Object members and array elements must be separated by commas. When one value is directly followed by another with no comma between them, the parser cannot tell where the first ends.
Example
Invalid
{ "a": 1 "b": 2 }Valid
{ "a": 1, "b": 2 }How to fix it
Add a comma between the two values.
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Diagnostics on this page come from @jsonlint/core, the open-source engine that powers the JSONLint validator. Install it with npm install @jsonlint/core.