warn-if-not-memoized

warns if wrapped function is not memoized

Usage

npm install --save warn-if-not-memoized

var warnIfNotMemoized = require('warn-if-not-memoized')

warnIfNotMemoized(fn, options)

Returns a wrapper for fn that will log a warning if successive calls to fn return values that are !== but are deeply equal according to options.isEqual (which defaults to lodash.isequal).

The wrapper will return its previous return value if it is deeply equal to the next value fn returns.

options

• isEqual ((a: any, b: any) => boolean): returns true if a and b are deeply equal (default: lodash.isequal)
• logError ((message: string) => any): logs the warning message (default: console.error)
• functionName (string): the name of the function to use in the warning message
• createWarningMessage ((info: {functionName: ?string, arguments: Array<any>, returnValue: any, prevReturnValue: any}) => string): creates a warning message when fn is determined to be not memoized.

warnIfNotMemoized.bypass (boolean)

Set warnIfNotMemoized.bypass = true in production to make warnIfNotMemoized return fn without wrapping it.

warnIfNotMemoized.defaultOptions

These are the global defaults for options. The actual values warnIfNotMemoized uses are:

require('lodash.defaults')({}, options, warnIfNotMemoized.defaultOptions)