@wordpress/is-shallow-equal
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Test for shallow equality between two objects or arrays.
8 lines (7 loc) • 1.77 kB
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{
"version": 3,
"sources": ["../src/objects.ts"],
"sourcesContent": ["/**\n * Internal dependencies\n */\nimport type { ComparableObject } from '.';\n\n/**\n * Returns true if the two objects are shallow equal, or false otherwise.\n *\n * @param a First object to compare.\n * @param b Second object to compare.\n *\n * @return Whether the two objects are shallow equal.\n */\nexport default function isShallowEqualObjects(\n\ta: ComparableObject,\n\tb: ComparableObject\n): boolean {\n\tif ( a === b ) {\n\t\treturn true;\n\t}\n\n\tconst aKeys = Object.keys( a );\n\tconst bKeys = Object.keys( b );\n\n\tif ( aKeys.length !== bKeys.length ) {\n\t\treturn false;\n\t}\n\n\tlet i = 0;\n\n\twhile ( i < aKeys.length ) {\n\t\tconst key = aKeys[ i ];\n\t\tconst aValue = a[ key ];\n\n\t\tif (\n\t\t\t// In iterating only the keys of the first object after verifying\n\t\t\t// equal lengths, account for the case that an explicit `undefined`\n\t\t\t// value in the first is implicitly undefined in the second.\n\t\t\t//\n\t\t\t// Example: isShallowEqualObjects( { a: undefined }, { b: 5 } )\n\t\t\t( aValue === undefined && ! b.hasOwnProperty( key ) ) ||\n\t\t\taValue !== b[ key ]\n\t\t) {\n\t\t\treturn false;\n\t\t}\n\n\t\ti++;\n\t}\n\n\treturn true;\n}\n"],
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