js objects are divided into local objects and host objects.
The so-called local objects, also known as built-in objects
Array Object Function Boolean
The so-called host object is the environment or object that has a host
BOM：window Navigator Screen History Location
DOM：Document Element Attribute Event
Both local objects inherit toString() and valueOf() methods
toString(): convert string
valueOf(): turn the original value (number)
1. Compare the size between local objects : follow the principle of array<string[toString()]<number[valueOf()]
That is, if any two are compared, the priority of the right side is higher than that of the left side . When comparing, the left side will be implicitly converted to the right side and then compared.
Array vs String: Array to String
Arrays vs Numbers: Arrays are first converted to strings and then to numbers
String vs Number: String to Number
When comparing with Boolean values, both sides are converted into numbers for comparison [true==>1 false==>0]
Arrays vs Booleans: Arrays are first converted to strings and then converted to numbers, and Booleans are converted directly to numbers
String vs Boolean: Strings are converted to numbers, and Booleans are directly captured as numbers
Number vs Boolean: Boolean to Number
2. Add (+) operation between local objects
String + Number: Number will be converted to string