Built-in objects

First, global objects

The global (Global) object is a special object in ECMAScript because the object does not exist. (The Web browser implements global as part of the Window object)

The global object has some built-in properties and methods:

1. Uri Encoding method

The URI encoding can encode the link for sending to the browser. They replace the invalid characters with a special UTF-8 encoding, which allows the browser to accept and understand.

encodeURI () does not encode special characters that belong to URIs, such as colons, forward slashes, question marks, and # numbers

encodeURIComponent () encodes any non-standard characters it discovers (using a higher frequency because the encoding is more thorough)

After using the URI encoding, it can also be decoded by:

decodeURI () and decodeURIComponent () to decode

2. Eval () method

The eval () method acts primarily as a string parser, accepting only one parameter, which is the string of JavaScript code that executes.

Built-in objects