Especificaciones SpecificationĮCMAScript Language Specification # īCD tables only load in the browser with JavaScript enabled. Si necesita soporte para motores de JavaScript obsoletos que no soportan fineProperty es mejor no emplear polyfills para métodos Array.prototype, ya que no puede hacerlos no-enumerables. Object.prototype._lookupSetter_() (en-US) Obsoleto.Object.prototype._lookupGetter_() (en-US) Obsoleto.
Object.prototype._defineSetter_() (en-US) Obsoleto. Object.prototype._defineGetter_() Obsoleto The findIndex() method returns the index of the first array element that satisfies the provided test function or else returns -1. I would recommend to add core-js in your project for polyfills. Hope this helps Edit: MDN has removed the polyfill section. Let’s take some examples of using the JavaScript Array findIndex() method. You can use Polyfill as IE do not support () I have tested and it worked for me. The syntax of findIndex() method in JavaScript, is: array.findIndex(functionName(currentElementValue, currentElementIndex, currentElementArray), thisValue). Once the findIndex() finds such an element, it immediately returns the element’s index. The findIndex() executes the testFn on every element in the array until it finds the one where testFn returns a truthy value, which is a value that coerces to true. If you omit the thisArg argument, the findIndex() function uses undefined. The thisArg is an optional object to be used this when executing the callback. array is the array that the findIndex() was called upon. Regular expressions are a powerful and flexible way to validate email addresses in JavaScript. index is the index of the current element being processed. This article covers four common methods of email validation in JavaScript: using regular expressions, using HTML5 validation, using email validation third-party libraries, and performing server-side validation. 
element is the current element in the array.The testFn is a function to execute on each element in the array until the function returns true, indicating that the element has been found. The findIndex() takes two arguments: 1) testFn FindIndex( testFn( element ]) ) Code language: CSS ( css ) And then have your findIndex look for the correct record based on the id: const bookmarkId .value const objIndex bookMarksArray.findIndex (obj > obj.
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