Function.prototype.changeThis = function (obj, args) {
    
    
	// 判断调用者是否为function类型
	if (typeof this !== 'function') {
    
    
		throw new Error('调用者不是一个函数')
		
	}
	const fn = Symbol() // 防止和其他属性冲突
	// 判断obj是否为null或者undefined
	if (obj == null || obj == undefined) {
    
    
		window[fn] = this
		window[fn](...args)
		delete window[fn]
	}
	// 判断obj是 number类型
	if (typeof obj === 'number') {
    
    
		Number.prototype[fn] = this
		Number.prototype[fn](...args)
		delete Number.prototype[fn]
	}
	// 判断obj是 string类型
	if (typeof obj === 'string') {
    
    
		String.prototype[fn] = this
		String.prototype[fn](...args)
		delete String.prototype[fn]
	}
	// 判断obj是boolean类型
	if (typeof obj === 'boolean') {
    
    
		Boolean.prototype[fn] = this
		Boolean.prototype[fn](...args)
		delete Boolean.prototype[fn]
	}
	// 判断obj是object类型
	if (typeof obj === 'object') {
    
    
		obj[fn] = this
		obj[fn](...args)
		delete obj[fn]
	}
	// 其他边界条件判断...
}
function foo(name) {
    
    
	this.name = name
	console.log(this, 'this')
}
foo.changeThis(123, ['张三'])
foo.changeThis('123', ['张三'])
foo.changeThis(true, ['张三'])
foo.changeThis({
    
     age: 123 }, ['张三'])
// Number {0, name: '张三', constructor: ƒ, toExponential: ƒ, toFixed: ƒ, …} 'this'
// String {'', name: '张三', constructor: ƒ, anchor: ƒ, big: ƒ, …} 'this'
// Boolean {false, name: '张三', constructor: ƒ, toString: ƒ, valueOf: ƒ, …} 'this'
// {age: 123, name: '张三', Symbol(): ƒ} 'this'

优雅的写法请看JavaScript-apply函数的简单实现