js自定义call apply bind

Function.prototype.myCall=function(context,...args){
    context=context==null ? globalThis : Object(context);
    const fnKey=Symbol('fn');
    context[fnKey]=this;
    const result=context[fnKey](...args);
    delete context[fnKey];
    return result;
}

Function.prototype.myApply=function(context,args=[]){
    context=context==null ? globalThis : Object(context);

 const fnKey=Symbol('fn'); context[fnKey]=this; const result=context[fnKey](...args); delete context[fnKey]; return result } 

Function.prototype.myBind = function(context, ...bindArgs) {
const originalFunc = this;

return function boundFunc(...callArgs) {
// 判断是否作为构造函数调用 (new boundFunc())
if (new.target) {
// 作为构造函数时，忽略绑定的 this
return new originalFunc(...bindArgs, ...callArgs);
} else {
// 普通调用，使用绑定的 context
const actualContext = context==null? globalThis : Object(context);

const fnKey = Symbol('fn');
actualContext[fnKey] = originalFunc;
const result = actualContext[fnKey](...bindArgs, ...callArgs);
delete actualContext[fnKey];
return result;
}
};
};

function logCall(...msg){
    console.log(msg)
}

function logApply(msg){
    console.log(msg)
}

logApply.myApply({},['this is mycall',4444]);
logCall.myCall({},'22',66);
const aa=logCall.myBind({},'55555','6666');
aa('9999')