1. The general approach to object inheritance is to copy: Object.extend
The implementation of prototype.js is:
Object.extend = function(destination, source) {
for (property in source) {
destination[property ] = source[property];
}
return destination;
}
In addition, there is another method, which is: Function.apply (of course using Function. You can also call)
The apply method can hijack the method of another object and inherit the properties of another object
Function.apply(obj, args) method can receive two parameters
obj: This object will replace this object in the Function class
args: This is an array, which will be passed as parameters to Function (args-->arguments)
apply demonstration code is as follows:
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