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IDBDatabaseException

In the IndexedDB API, an IDBDatabaseException object represents exception conditions that can be encountered while performing database operations.
API Obsolete Reference

IDBFactory.open()

If an error occurs while the database connection is being opened, then an error event is fired on the request object returned from this method.
API Method Obsolete Reference

Notation

Represents a DTD notation (read-only). May declare format of an unparsed entity or formally declare the document's processing instruction targets. Inherits methods and properties from Node. Its nodeName is the notation name. Has no parent.
API Obsolete Reference Référence

Deprecated and obsolete features

This page lists features of JavaScript that are deprecated (that is, still available but planned for removal) and obsolete (that is, no longer usable).
Deprecated JavaScript Obsolete

Array.observe()

The Array.observe() method was used for asynchronously observing changes to Arrays, similar to Object.observe() for objects. It provided a stream of changes in order of occurrence. It's equivalent to Object.observe() invoked with the accept type list ["add", "update", "delete", "splice"]. However, this API has been deprecated and removed from Browsers. You can use the more general Proxy object instead.
Array JavaScript Method Obsolete

Array.unobserve()

The Array.unobserve() method was used to remove observers set by Array.observe(), but has been deprecated and removed from Browsers. You can use the more general Proxy object instead.
Array JavaScript Method Obsolete

Number.toInteger()

The Number.toInteger() method used to evaluate the passed value and convert it to an integer, but its implementation has been removed.
JavaScript Method Number Obsolete

Object.prototype.eval()

The Object.eval() method used to evaluate a string of JavaScript code in the context of an object, however, this method has been removed.
JavaScript Method Object Obsolete

Object.getNotifier()

The Object.getNotifer() method was used to create an object that allows to synthetically trigger a change, but has been deprecated and removed in browsers.
JavaScript Method Object Obsolete

Object.observe()

The Object.observe() method was used for asynchronously observing the changes to an object. It provided a stream of changes in the order in which they occur. However, this API has been deprecated and removed from browsers. You can use the more general Proxy object instead.
JavaScript Method Object Obsolete

Object.unobserve()

The Object.unobserve() method was used to remove observers set by Object.observe(), but has been deprecated and removed from Browsers. You can use the more general Proxy object instead.
JavaScript Method Object Obsolete

ParallelArray

The goal of ParallelArray was to enable data-parallelism in web applications. The higher-order functions available on ParallelArray attempted to execute in parallel, though they may fall back to sequential execution if necessary. To ensure that your code executes in parallel, it is suggested that the functions should be limited to the parallelizable subset of JS that Firefox supports.
JavaScript Obsolete ParallelArray

ElementTraversal

The ElementTraversal interface was defining methods allowing to access from one Node to another one in the document tree.
API DOM DOM Reference Obsolete