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noDuplicateJsxProps

Diagnostic Category: lint/suspicious/noDuplicateJsxProps

Since: v1.0.0

Sources:

Prevents JSX properties to be assigned multiple times.

Examples

Section titled Examples

Invalid

Section titled Invalid
<Hello name="John" name="John" />
code-block.jsx:1:8 lint/suspicious/noDuplicateJsxProps ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This JSX property is assigned multiple times.
  
  > 1 │ <Hello name=“John” name=“John” />
      │        ^^^^^^^^^^^
    2 │ 
  
  ℹ This attribute is assigned again here.
  
  > 1 │ <Hello name=“John” name=“John” />
      │                    ^^^^^^^^^^^
    2 │ 
  
<label xml:lang="en-US" xml:lang="en-US"></label>
code-block.jsx:1:8 lint/suspicious/noDuplicateJsxProps ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ This JSX property is assigned multiple times.
  
  > 1 │ <label xml:lang
=“en-US” xml:lang
=“en-US”></label>
      │        ^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ This attribute is assigned again here.
  
  > 1 │ <label xml:lang
=“en-US” xml:lang
=“en-US”></label>
      │                         ^^^^^^^^^^^^^^^^
    2 │

Valid

Section titled Valid
<Hello firstname="John" lastname="Doe" />
<label xml:lang="en-US" lang="en-US"></label>
Section titled Related links