Baseline Widely available
Note: This feature is available in Web Workers.
The cmp() method of the IDBFactory interface compares two values as keys to determine equality and ordering for IndexedDB operations, such as storing and iterating.
Note: Do not use this method for comparing arbitrary JavaScript values, because many JavaScript values are either not valid IndexedDB keys (booleans and objects, for example) or are treated as equivalent IndexedDB keys (for example, since IndexedDB ignores arrays with non-numeric properties and treats them as empty arrays, so any non-numeric arrays are treated as equivalent). This throws an exception if either of the values is not a valid key.
Syntax Parametersfirst
The first key to compare.
second
The second key to compare.
An integer that indicates the result of the comparison; the table below lists the possible values and their meanings:
Returned value Description -1 1st key is less than the 2nd key 0 1st key is equal to the 2nd key 1 1st key is greater than the 2nd key ExceptionsDataError DOMException
Thrown if one of the supplied keys was not a valid key.
const a = 1;
const b = 2;
const result = window.indexedDB.cmp(a, b);
console.log(`Comparison results: ${result}`);
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